Dr. Bunjerd Jongsomjit

ดร. บรรเจิด จงสมจิตร

Education : Ph.D. in Chemical Engineering, University of Pittsburgh, 2002 M.S. in Chemical Engineering, Colorado School of Mines, 1998 B.S. in Chemistry with 2ndclass honors, Kasetsart University, 1990

Address

Department of Chemical Engineering, 10th Floor, Building 4,
Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

bunjerd.j@chula.ac.th

Research profile

02-218-6874

02-218-6877

Research interest

My research focuses on heterogeneous catalysis including: (i) catalytic ethanol transformation into other value-added products such as ethylene, diethyl ether, acetaldehyde, butanol, etc., (ii) development of polymerization catalysts such as Ziegler-Natta and metallocene catalysts for olefin polymerization, and (iii) methanol synthesis via CO and CO2 hydrogenationover copper-based catalysts.

Highlights

Development of solid acid catalysts such as mixed-phase alumina, acid-modified clay, La and Zr-modified SBA-15, Pd modified beta zeolite and W/TiO2 , for ethanol dehydration to ethylene and diethyl ether.
Development of solid catalysts such as activated carbons, MgAl mixed oxides, and supported AgLi for ethanol dehydrogenation to acetaldehyde and butanol.
Development of Ziegler-Natta catalysts for gas-phase polymerization.
Utilization of CO2 for methanol synthesis.

Expertise

Heterogeneous Catalysis

Catalytic ethanol reaction

Polymerization catalysts

Research Groups

Center of Excellence on Catalysis and Catalytic Reaction Engineering

Publications

Auepattana-aumrung, C., Wannapaiboon, S., Wannakao, S., Praserthdam, S., Jongsomjit, B., Panpranot, J., Praserthdam, P. A study of the acidity on catalyst surface to control 1-butene reaction mechanism of metallosilicate catalysts, 2022, Molecular Catalysis, 529, 112533.

Prasertcharoensuk, P., Promtongkaew, A., Tawatchai, M., Marquez, V., Jongsomjit, B., Tahir, M., Praserthdam, S., Praserthdam, P. A review on sensitivity of operating parameters on biogas catalysts for selective oxidation of Hydrogen Sulfide to elemental sulfur, 2022, Chemosphere, 301, 134579.

Kamsuwan, T., Guntida, A., Praserthdam, P., Jongsomjit, B. Differences in Deterioration Behaviors of Cu/ZnO/Al2O3Catalysts with Different Cu Contents toward Hydrogenation of CO and CO2, 2022, ACS Omega, 7 (29), 25783-25797.

Istadi, I., Amalia, R., Riyanto, T., Anggoro, D.D., Jongsomjit, B., Putranto, A.B. Acids treatment for improving catalytic properties and activity of the spent RFCC catalyst for cracking of palm oil to kerosene-diesel fraction fuels, 2022, Molecular Catalysis, 527, 112420.

Preedavijitkul, S., Autthanit, C., Praserthdam, P., Jongsomjit, B. Role of Cr on Cu-Cr catalyst via direct ethanol dehydrogenation to ethyl acetate, 2022, Journal of Environmental Chemical Engineering, 10 (3), 107542.

Khamkeaw, A., Jongsomjit, B., Yip, A.C.K., Phisalaphong, M. Application of activated carbon derived from bacterial cellulose for mesoporous HZSM-5 catalyst synthesis and performances of catalyst in bioethanol dehydration, 2022, Biomass and Bioenergy, 160, 106440.

Guntida, A., Jongsomjit, B., Praserthdam, S., Praserthdam, P. Enhanced stability of Ti-containing silica catalysts for biodiesel epoxidation with hydrogen peroxide: Presence of strong metal–support interactions for alleviating permanent deactivation, 2022, Fuel, 314, 122736.

Kamsuwan, T., Jongsomjit, B., Herrera, J.E. The role of ruthenium on the acidity of mixed alumina and silica phases and its impact on activity for ethanol dehydration, 2022, Canadian Journal of Chemical Engineering, 100 (3), 559-568.

Seekhiaw, P., Pinthong, P., Praserthdam, P., Jongsomjit, B. Optimal Conditions for Butanol Production from Ethanol over MgAlO Catalyst Derived from Mg-Al Layer Double Hydroxides, 2022, Journal of Oleo Science, 71 (1), 141-149.

Charoensuppanimit, P., Chaiapha, B., Assabumrungrat, S., Jongsomjit, B. Incorporation of diethyl ether production to existing bioethanol process: Techno-economic analysis, 2021, Journal of Cleaner Production, 327, 129438.

Tohdee, K., Semmad, S., Jotisankasa, A., Praserthdam, P., Jongsomjit, B. Investigation of sulfonated solid acid catalysts derived from oil palm kernel shell, corncob, and diatomaceous earth for esterification of ethanol and propanoic acid, characterisation and their performance, 2021, Bioresource Technology Reports, 16, 100855.

Klinthongchai, Y., Prichanont, S., Praserthdam, P., Jongsomjit, B. Study of deactivation in mesocellular foam carbon (MCF-C) catalyst used in gas-phase dehydrogenation of ethanol, 2021, Scientific Reports 11(1), 11683.

Sricharoen, C., Jongsomjit, B., Panpranot, J., Praserthdam, P. The key to catalytic stability on sol–gel derived SnOx/SiO2 catalyst and the comparative study of side reaction with K-PtSn/Al2O3 toward propane dehydrogenation, 2021, Catalysis Today 375, 343-351.

Autthanit, C., Likitpiriya, N., Praserthdam, P., Jongsomjit, B. Development of a New Ternary Al2O3-HAP-Pd Catalyst for Diethyl Ether and Ethylene Production Using the Preferential Dehydration of Ethanol, 2021, ACS Omega 6(30), 19911-19923.

Kamsuwan, T., Krutpijit, C., Praserthdam, S., Phatanasri, S., Jongsomjit, B., Praserthdam, P. Comparative study on the effect of different copper loading on catalytic behaviors and activity of Cu/ZnO/Al2O3 catalysts toward CO and CO2 hydrogenation, 2021, Heliyon 7(7), e07682.

Klinthongchai, Y., Prichanont, S., Praserthdam, P., Jongsomjit, B. Effect of TMB/P123 ratios on physicochemical properties of mesocellular foam carbon (MCF-C) as catalyst for ethanol dehydrogenation, 2021, Materials Today Chemistry 20, 100466.

Auepattana-aumrung, C., Praserthdam, S., Wannakao, S., Jongsomjit, B., Panpranot, J., Praserthdam, P. Observation of reduction on alkane products in butene cracking over ZSM-5 modified with Fe, Cu, and Ni catalysts, 2021, Fuel 291, 120265.

Autthanit, C., Khaochartchai, C., Praserthdam, P., Jongsomjit, B. Elucidation of Pd modification effect on catalytic behaviors of γ-Al2O3-P catalysts toward ethanol dehydration and dehydrogenation, 2021, Catalysis Communications 148, 106169.

Kamsuwan, T., Jongsomjit, B., Herrera, J.E. The role of ruthenium on the acidity of mixed alumina and silica phases and its impact on activity for ethanol dehydration, 2021, Canadian Journal of Chemical Engineering .

Pinthong, P.| Praserthdam, P.| Jongsomjit, B. Oxidative dehydrogenation of ethanol over Cu/Mg-Al catalyst derived from hydrotalcite: effect of ethanol concentration and reduction conditions, 2020, Journal of Zhejiang University: Science A 21(3), 218-28.

Tumawong, P.| Chaichana, E.| Jongsomjit, B. Effect of immobilization methods on the production of polyethylene-cellulose biocomposites via ethylene polymerization with metallocene/MAO catalyst, 2020, Bulletin of Chemical Reaction Engineering & Catalysis 15(3), 752-64.

Tresatayawed, A.| Glinrun, P.| Autthanit, C.| Jongsomjit, B. Pd modification and supporting effects on catalytic dehydration of ethanol to ethylene and diethyl ether over W/TiO2 catalysts, 2020, Journal of Oleo Science 69(5), 503-15.

Pongchan, T.| Praserthdam, P.| Jongsomjit, B. Gas-phase polymerization of ethylene over Ti-based Ziegler–Natta catalysts prepared from different magnesium sources,
2020, Materials Today Chemistry 18, 100366.

Sricharoen, C.| Jongsomjit, B.| Panpranot, J.| Praserthdam, P. The key to catalytic stability on sol–gel derived SnOx/SiO2 catalyst and the comparative study of side reaction with K-PtSn/Al2O3 toward propane dehydrogenation, 2020, Catalysis Today.

Takkawatakarn, T.| Suriye, K.| Jongsomjit, B.| Panpranot, J.| Praserthdam, P. Influence of acidity on the performance of silica supported tungsten oxide catalysts assessed by in situ and Operando DRIFTS,
2020, Catalysis Today 358, 343-53.

Boonpai, S., Suriye, K., Jongsomjit, B., Panpranot, J., Praserthdam, P. Hydrogen activated WOx-supported catalysts for Lewis acid transformation to Bronsted acid observed by in situ DRIFTS of adsorbed ammonia: Effect of different supports on the Lewis acid transformation,
2020, Catalysis Today 358, 370-86.

Auepattana-aumrung, C., Suriye, K., Jongsomjit, B., Panpranot, J., Praserthdam, P. Inhibition effect of Na+ form in ZSM-5 zeolite on hydrogen transfer reaction via 1-butene cracking, 2020, Catalysis Today, 358, 237-45.

Pongchan, T., Praserthdam, P., Jongsomjit, B. Temperature effect on propylene polymerization behavior over Ziegler-Natta catalyst with different cocatalyst systems,
2020, Materials Research Express 7(2), 25309.

Autthanit, C., Chatkaew, W., Praserthdam, P., Jongsomjit, B. Effect of different phase composition in titania on catalytic behaviors of AgLi/TiO2 catalysts via ethanol dehydrogenation , 2020, Journal of Environmental Chemical Engineering 8, 103547.

Auepattana-aumring, C., Marquez, V., Wannakao, S., Jongsomjit, B., Panpranot, J., Praserthdam, P. Role of Al in Na-ZSM-5 zeolite structure on catalyst stability in butene cracking reaction , 2020, Scientific Reports 10, 13643.

Krutpijit, C., Tochaeng, P., Jongsomjit, B. Temperature and ethanol concentration effects on catalytic ethanol dehydration behaviors over alumina-spherical silica particle composite catalysts , 2020, Catalysis Communications 145, 106102.

Khamkeaw, A., Asavamongkolkul, T., Perngyai, T., Jongsomjit, B., Phisalaphong, M. Interconnected micro, meso, and macro porous activated carbon from bacterial nanocellulose for superior adsorption properties and effective catalytic performance , 2020, Molecules 25(18), 4063.

Boonpai, S., Wannakao, S., Panpranot, J., Jongsomjit, B., Praserthdam, P. Active Site Formation in WOxSupported on Spherical Silica Catalysts for Lewis Acid Transformation to Brønsted Acid Activity , 2020, Journal of Physical Chemistry C, 124, 29, 15935-15943.

Klinthongchai, Y., Prichanont, S., Praserthdam, P. Synthesis, characteristics and application of mesocellular foam carbon (MCF-C) as catalyst for dehydrogenation of ethanol to acetaldehyde. 2020. Journal of Environmental Chemical Engineering, 103752.

Kamsuwan, T., Praserthdam, P., Jongsomjit, B. Tuning of catalytic behaviors in ethanol dehydration with oxygen cofeeding over Pd-HBZ catalyst for ethylene production at low temperature. 2020. Catalysis Communications, 137, 105941.

Pongchan, T., Praserthdam, P., Jongsomjit, B. Facile Investigation of Ti3+ State in Ti-based Ziegler-Natta Catalyst with A Combination of Cocatalysts Using Electron Spin Resonance (ESR). 2020. Bulletin of Chemical Reaction Engineering & Catalysis, 15 (1), 55-65.

Kerdnoi, P., Autthanit, C., Chitpong, N., Jongsomjit, B. Catalytic Dehydration of Ethanol over W/TiO2 Catalysts Having Different Phases of Titania Support. 2020. Bulletin of Chemical Reaction Engineering & Catalysis, 15 (1), 96-103.

Krutpijit, C., Tian, W., Jongsomjit, B., Pjontek, D., Herrera, J. E. Lithium promotion in ethanol oxidative dehydrogenation over Al-modified Ag/Montmorillonite clays. 2020. Molecular Catalysis, 483, 110717.

Khamkeaw, A., Phisalaphong, M., Jongsomjit, B., Lin, K. Y. A., Yip, A. C. Synthesis of mesoporous MFI zeolite via bacterial cellulose-derived carbon templating for fast adsorption of formaldehyde. 2020. Journal of hazardous materials, 384, 121161.

Jamnongphol S., Jaturapiree A., Sukrat K., Saowapark T., Chaichana E., Jongsomjit B. Rice Husk-Derived Silica as a Support for Zirconocene/MMAO Catalyst in Ethylene Polymerization. 2020. Waste and Biomass Valorization, 11 (2), 769-779.

Rittiruam, M., Jongsomjit, B., Praserthdam, S. A computational-experimental investigation on high ethylene selectivity in ethanol dehydration reaction found on WO x/ZrO 2-activated carbon bi-support systems. 2019. Scientific Reports, 9 (1), 1-9.

Khamkeaw, A., Jongsomjit, B., Robison, J., Phisalaphong, M. Activated carbon from bacterial cellulose as an effective adsorbent for removing dye from aqueous solution. 2019. Separation Science and Technology, 54 (14), 2180-2193.

Wandondaeng, T., Autthanit, C., Jongsomjit, B., Praserthdam, P. Observation of Increased Dispersion of Pt and Mobility of Oxygen in Pt/-Al2O3 Catalyst with La Modification inCO Oxidation. 2019. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (3).

Khamkeaw, A., Phanthang, L., Jongsomjit, B., Phisalaphong, M. Activated carbon derived from bacterial cellulose and its use as catalyst support for ethanol conversion to ethylene. 2019. Catalysis Communications, 129, 105750.

Sangpatch, T., Supakata, N., Kanokkantapong, V., Jongsomjit, B. Fuel oil generated from the cogon grass-derived Al–Si (Imperata cylindrica (L.) Beauv) catalysed pyrolysis of waste plastics. 2019. Heliyon, 5 (8), e02324.

Ob-eye, J., Praserthdam, P., Jongsomjit, B. Ethanol Dehydrogenation to Acetaldehyde over Activated Carbons-Derived from Coffee Residue. 2019. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (2), 268.

Pinthong, P., Praserthdam, P., Jongsomjit, B. Oxidative Dehydrogenation of Ethanol over Vanadium-and Molybdenum-modified Mg-Al Mixed Oxide Derived from Hydrotalcite. (2019). Journal of oleo science, 68 (7), 679-687.

Chaichana, E., Boonsinvarothai, N., Chitpong, N., Jongsomjit, B. Catalytic dehydration of ethanol to ethylene and diethyl ether over alumina catalysts containing different phases with boron modification. 2019. Journal of Porous Materials, 26 (2), 599-610.

Tresatayawed, A., Glinrun, P., Jongsomjit, B. Ethanol Dehydration over WO3/TiO2 Catalysts Using Titania Derived from Sol-Gel and Solvothermal Methods. 2019. International Journal of Chemical Engineering, 2019.

Chaichana, E., Wiwatthanodom, W., Jongsomjit, B. Carbon-Based Catalyst from Pyrolysis of Waste Tire for Catalytic Ethanol Dehydration to Ethylene and Diethyl Ether. 2019. International Journal of Chemical Engineering, 2019.

Pinthong, P., Praserthdam, P., Jongsomjit, B. Effect of calcination temperature on Mg-Al layered double hydroxides (LDH) as promising catalysts in oxidative dehydrogenation of ethanol to acetaldehyde. 2019. Journal of oleo science, 68 (1), 95-102.

Limlamthong, M., Chitpong, N., Jongsomjit, B. Influence of Phosphoric Acid Modification on Catalytic Properties of γ-χ Al2O3 Catalysts for Dehydration of Ethanol to Diethyl Ether. (2019). Bulletin of Chemical Reaction Engineering & Catalysis, 14 (1), 1.

Takkawatakarn, T., Suriye, K., Jongsomjit, B., Panpranot, J., Praserthdam, P. Influence of acidity on the performance of silica supported tungsten oxide catalysts assessed by in situ and Operando DRIFTS. 2019. Catalysis Today.

Ob-eye, J., Praserthdam, P., Jongsomjit, B. Dehydrogenation of ethanol to acetaldehyde over different metals supported on carbon catalysts. 2019. Catalysts, 9 (1), 66.

Ob-eye, J., Jongsomjit, B. Dehydrogenation of Ethanol to Acetaldehyde over Co/C Catalysts. 2019. Engineering Journal, 23 (3), 1-13.

Autthanit, C., Chatkaew, W., Praserthdam, P., Jongsomjit, B. Effect of different phase composition in titania on catalytic behaviors of AgLi/TiO2 catalysts via ethanol dehydrogenation. 2019. Journal of Environmental Chemical Engineering, 103547.

Thanarattanasap, N., Tumawong, P., Sinsawat, T., Chaichana, E., Jongsomjit, B. Polyethylene/Bacterial-Cellulose Biocomposite Synthesized via In Situ Polymerization with Zirconocene/MMAO Catalyst. 2019. Engineering Journal, 23 (3), 15-28.

Yun, D., Krutpijit, C., Jongsomjit, B., Herrera, J. E. Asymmetrical coexistence of associatively and dissociatively adsorbed alcohol species over α-Fe2O3 iron oxide nanoparticles. 2018. Surface Science, 677, 203-212.

Autthanit, C., Praserthdam, P., Jongsomjit, B. Oxidative and non-oxidative dehydrogenation of ethanol to acetaldehyde over different VOx/SBA-15 catalysts. 2018. Journal of environmental chemical engineering, 6 (5), 6516-6529.

Niyomthai, T., Jongsomjit, B., Praserthdam, P. Impact of AlCl3 and FeCl2 Addition on Catalytic Behaviors of TiCl4/MgCl2/THF Catalysts for Ethylene Polymerization and Ethylene/1-Hexene Copolymerization. (2018). Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3), 393-404.

Kamsuwan, T., Jongsomjit, B. Characterization of Different Si-and Al-based Catalysts with Pd Modification and Their Use for Catalytic Dehydration of Ethanol. 2018. Journal of oleo science, 67 (8), 1005-1014.

Niyomthai, T., Jongsomjit, B., Praserthdam, P. Hydrogen effects in TiCl 4/MgCl 2/THF catalysts with second Lewis acid addition on ethylene polymerization behaviors. 2018. Polymer Bulletin, 75 (7), 3211-3226.

Niyomthai, T., Ratchadaphet, A., Jongsomjit, B., Praserthdam, P. Influence of Hydrogen on Catalytic Properties of Ziegler‐Natta Catalysts Prepared by Different Methods in Ethylene Polymerization. 2018. Advances in Polymer Technology, 37 (4), 1035-1040.

Autthanit, C., Jongsomjit, B. Production of ethylene through ethanol dehydration on SBA-15 catalysts synthesized by sol-gel and one-step hydrothermal methods. 2018. Journal of oleo science, 67 (2), 235-243.

Buapan, E., Chaichana, E., Chitpong, N., Jongsomjit, B. Synthesis of Mesoporous TiO 2 with a Template Free One Step Reaction of Acid-Catalyzed TiC. 2018. Engineering Journal, 22 (3), 11-24.

Krutpijit, C., Jongsomjit, B. Catalytic ethanol dehydration over different acidactivated montmorillonite clays. 2016. Journal of Oleo Science 65 (4) , 347-355.

Chanchuey, T., Autthanit, C., Jongsomjit, B. Effect of Mo-doped mesoporous Al-SSP catalysts for the catalytic dehydration of ethanol to ethylene. 2016. Journal of Chemistry 2016

Wannaborworn, M., Sriphaisal, T., Praserthdam, P., Jongsomjit, B. Ethylene/1-hexene copolymerization over different phases titania-supported zirconocene catalysts. 2015. Engineering Journal 19 (5) , 55-67.

Janlamool, J., Jongsomjit, B. Oxidative dehydrogenation of ethanol over AgLi-Al<inf>2</inf>O<inf>3</inf> catalysts containing different phases of alumina. 2015. Catalysis Communications 70 , 49-52.

Janlamool, J., Jongsomjit, B. Oxidative dehydrogenation of ethanol over AgLi-Al2O3 catalysts containing different phases of alumina. 2015. Catalysis Communications 70 , 49-52.

Wannaborworn, M., Praserthdam, P., Jongsomjit, B. A comparative study of solvothermal and sol-gel-derived nanocrystalline alumina catalysts for ethanol dehydration. 2015. Journal of Nanomaterials 2015

Kaewduang, M., Chaichana, E., Jongsomjit, B., Jaturapiree, A. Use of coir-filled LLDPE as a reinforcement for natural rubber composite. 2015. Key Engineering Materials 659 , 522-526.

Hongmanee, G., Sripothongnak, S., Jongsomjit, B., Praserthdam, P. Observation on different reducing power of cocatalysts on the Ziegler-Natta catalyst containing alkoxide species for ethylene polymerization. 2014. Journal of Applied Polymer Science 131 (20)

Janlamool, J., Bashlakov, D., Berg, O., Praserthdam, P., Jongsomjit, B., Juurlink, L. Desorption of water from distinct step types on a curved silver crystal. 2014. Molecules 19 (8) , 10845-10862.

Phiwkliang, W., Jongsomjit, B., Praserthdam, P. Synergistic effects of the zncl2-sicl4 modified ticl4/mgcl2/thf catalytic system on ethylene/1-hexene and ethylene/1-octene copolymerizations. 2014. Chinese Journal of Polymer Science (English Edition) 32 (1) , 84-91.

Jantasee, S., Jongsomjit, B., Yano, H., Shiono, T. Modification effect of spherical zirconia with SiCl4 as a support of methylaluminoxane for heterogeneous single-site catalyst. 2013. European Polymer Journal 49 (12) , 4195-4200.

Phiwkliang, W., Jongsomjit, B., Praserthdam, P. Effect of ZnCl2- and SiCl4-doped TiCl 4/MgCl2/THF catalysts for ethylene polymerization. 2013. Journal of Applied Polymer Science 130 (3) , 1588-1594.

Wannaborworn, M., Praserthdam, P., Jongsomjit, B., Cai, Z., Yano, H., Shiono, T. Copolymerization of ethylene and 1-hexene with ansa- dimethylsilylene(fluorenyl) (t-butylamido)dimethyltitanium complexes activated by modified methylaluminoxane. 2013. Macromolecular Chemistry and Physics 214 (22) , 2584-2590.

Panupakorn, P., Chaichana, E., Praserthdam, P., Jongsomjit, B. Polyethylene/clay nanocomposites produced by in situ polymerization with zirconocene/MAO catalyst. 2013. Journal of Nanomaterials 2013

Niticharoenwong, B., Shotipruk, A., Mekasuwandumrong, O., Panpranot, J., Jongsomjit, B. Characteristics of activated carbons derived from deoiled rice bran residues. 2013. Chemical Engineering Communications 200 (10) , 1309-1321.

Chanchaochai, P., Boonnoun, P., Laosiripojana, N., Goto, M., Jongsomjit, B., Panpranot, J., Mekasuwandumrong, O., Shotipruk, A. Transesterification of palm oil at near-critical conditions using sulfonated carbon-based acid catalyst. 2013. Chemical Engineering Communications 200 (11) , 1542-1552.

Khaubunsongserm, S., Jongsomjit, B., Praserthdam, P. Bis [N-(3-tert-butylsalicylidene) cyclooctylamine] titanium dichloride activated with MAO for ethylene polymerization. 2013. European Polymer Journal 49 (7) , 1753-1759.

Chaichana, E., Pathomsap, S., Shiono, T., Jongsomjit, B. Observation of bimodal LLDPE/TiO2 nanocomposites produced by in situ polymerization with

zirconocene/MMAO catalysts via Ga modification on TiO2 nanofiller. 2013. Engineering Journal 17 (3) , 33-42.

Khaubunsongserm, S., Hormnirun, P., Nanok, T., Jongsomjit, B., Praserthdam, P. Fluorinated bis(phenoxy-imine)titanium complexes with methylaluminoxane for the synthesis of ultra high molecular weight polyethylene. 2013. Polymer (United Kingdom) 54 (13) , 3217-3222.

Jantasee, S., Shiono, T., Jongsomjit, B. Copolymerization of ethylene/1-hexene with zirconocene/MAO catalyst supported on spherical zirconia modified with BCl3, SiCl4, and glycerol. 2013. Polymer Bulletin 70 (6) , 1753-1768.

Pinkaew, K., Praserthdam, P., Jongsomjit, B. Effect of nanocrystallite size of TiO2 in Co/TiO2 and Co/TiO2-Ru catalysts on methanation. 2013. Korean Journal of Chemical Engineering 30 (1) , 50-54.

Pinyocheep, J., Ayudhya, S., Jongsomjit, B., Praserthdam, P. Observation on inhibition of Ti 3+ reduction by fumed silica addition in Ziegler-Natta catalyst with in situ ESR. 2012. Journal of Industrial and Engineering Chemistry 18 (6) , 1888-1892.

Amornlertpreecha, S., Shiono, T., Jongsomjit, B. Copolymerization of ethylene/1-Olefin with mesoporous titania-supported zirconocene/MAO catalyst. 2012. Engineering Journal 16 (5) , 9-15.

Srisawad, N., Chaitree, W., Mekasuwandumrong, O., Shotipruk, A., Jongsomjit, B., Panpranot, J. CO 2 hydrogenation over Co/Al 2O 3 catalysts prepared via a solid-state reaction of fine gibbsite and cobalt precursors. 2012. Reaction Kinetics, Mechanisms and Catalysis 107 (1) , 179-188.

Rojanapipatkul, S., Goodwin, J., Praserthdam, P., Jongsomjit, B. Effect of cobalt precursors on properties of Co/CoAl 2O 4 catalysts synthesized by solvothermal method. 2012. Engineering Journal 16 (4) , 5-14.

Kumpangpet, R., Jongsomjit, B., Thanachayanont, C., Prichanont, S. Fabrication of gold nanoparticles/ polypyrrole /HRP electrode for phenol biosensor by electropolymerization. 2012. Engineering Journal 16 (3) , 45-52.

Jongsomjit, B., PinKaew, K., Mekasuwandumrong, O., Panpranot, J., Shotipruk, A., Praserthdam, P., Goodwin, J. Zirconia modification on nanocrystalline titania-supported cobalt catalysts for methanation. 2012. Engineering Journal 16 (4) , 29-38.

Kaivalchatchawal, P., Samingprai, S., Shiono, T., Praserthdam, P., Jongsomjit, B. Effect of Ga- and BCl 3-modified silica-supported [t-BuNSiMe 2(2,7-t-Bu 2Flu)]TiMe 2/MAO catalyst on ethylene/1-hexene copolymerization. 2012. European Polymer Journal 48 (7) , 1304-1312.

Chaichana, E., Pathomsap, S., Mekasuwandumrong, O., Panpranot, J., Shotipruk, A., Jongsomjit, B. LLDPE/TiO 2 nanocomposites produced from different crystallite sizes of TiO 2 via in situ polymerization. 2012. Chinese Science Bulletin 57 (17) , 2177-2184.

Wannaborworn, M., Praserthdam, P., Jongsomjit, B. Lldpe synthesis via sio 2-ga-supported zirconocene/mmao catalyst. 2012. Journal of Industrial and Engineering Chemistry 18 (1) , 373-377.

Chaichana, E., Shiono, T., Praserthdam, P., Jongsomjit, B. A comparative study of in situ and ex situ impregnation for LLDPE/silica composites production. 2012. Engineering Journal 16 (1) , 27-36.

Chaichana, E., Ngowthanawat, A., Mekasuwandumrong, O., Panpranot, J., Shotipruk, A., Jongsomjit, B. Catalytic performance of ZnO nanoparticle in formation of LLDPE/ZnO nanocomposites. 2012. Iranian Polymer Journal (English Edition) 21 (1) , 51-63.

Senso, N., Praserthdam, P., Jongsomjit, B., Taniike, T., Terano, M. Effects of Ti oxidation state on ethylene, 1-hexene comonomer polymerization by MgCl 2-supported Ziegler-Natta catalysts. 2011. Polymer Bulletin 67 (9) , 1979-1989.

Patthamasang, S., Jongsomjit, B., Praserthdam, P. Effect of EtOH/MgCl 2 molar ratios on the catalytic properties of MgCl 2-SiO 2/TiCl 4 Ziegler-Natta catalyst for ethylene polymerization. 2011. Molecules 16 (10) , 8332-8342.

Janlamool, J., Praserthdam, P., Jongsomjit, B. Ti-Si composite oxide-supported cobalt catalysts for CO 2 hydrogenation. 2011. Journal of Natural Gas Chemistry 20 (5) , 558-564.

Senso, N., Jongsomjit, B., Praserthdam, P. Effect of calcination treatment of zirconia on W/ZrO 2 catalysts for transesterification. 2011. Fuel Processing Technology 92 (8) , 1537-1542.

Khaodee, W., Tangchupong, N., Jongsomjit, B., Laosiripojana, N., Praserthdam, P., Assabumrungrat, S. Isosynthesis via CO hydrogenation over SO4-ZrO2 catalysts. 2010. Journal of Industrial and Engineering Chemistry 16 (3) , 411-418.

Petchmala, A., Laosiripojana, N., Jongsomjit, B., Goto, M., Panpranot, J., Mekasuwandumrong, O., Shotipruk, A. Transesterification of palm oil and esterification of palm fatty acid in near- and super-critical methanol with SO4-ZrO2 catalysts. 2010. Fuel 89 (9) , 2387-2392.

Mekasuwandumrong, O., Phothakwanpracha, S., Jongsomjit, B., Shotipruk, A., Panpranot, J. Liquid-phase selective hydrogenation of 1-heptyne over Pd/TiO2 catalyst synthesized by one-step flame spray pyrolysis. 2010. Catalysis Letters 136 (1-2) , 164-170.

Ngaosuwan, K., Jongsomjit, B., Praserthdam, P. The role of zirconia surface on catalytic activity of tungstated zirconia via two-phase esterification of acetic acid and 1-heptanol. 2010. Catalysis Letters 136 (1-2) , 134-140.

Wongmaneenil, P., Jongsomjit, B., Praserthdam, P. Solvent effect on synthesis of zirconia support for tungstated zirconia catalysts. 2010. Journal of Industrial and Engineering Chemistry 16 (2) , 327-333.

Tangchupong, N., Khaodee, W., Jongsomjit, B., Laosiripojana, N., Praserthdam, P., Assabumrungrat, S. Effect of calcination temperature on characteristics of sulfated zirconia and its application as catalyst for isosynthesis. 2010. Fuel Processing Technology 91 (1) , 121-126.

Praserthdam, S., Jongsomjit, B. Observation on different turnover number in two-phase acid-catalyzed esterification of dilute acetic acid and 1-heptanol. 2009. Catalysis Letters 130 (3-4) , 583-587.

Tangjituabun, K., Jongsomjit, B., Praserthdam, P. Catalytic behaviors of SiO2-supported various aluminoxanes as coactivator in MgCl2/DEP/TiCl4-TEA catalysts for propylene polymerization. 2009. Catalysis Communications 10 (9) , 1319-1323.

Wongmaneenil, P., Jongsomjit, B., Praserthdam, P. Influence of calcination treatment on the activity of tungstated zirconia catalysts towards esterification. 2009. Catalysis Communications 10 (7) , 1079-1084.

Chitpong, N., Praserthdam, P., Jongsomjit, B. A study on characteristics and catalytic properties of Co/ZrO2-B catalysts towards methanation. 2009. Catalysis Letters 128 (1-2) , 119-126.

KHAODEE, W., TANGCHUPONG, N., JONGSOMJIT, B., PRASERTHDAM, P., ASSABUMRUNGRAT, S. A study on isosynthesis via CO hydrogenation over ZrO2-CeO2 mixed oxide catalysts. 2009. Catalysis Communications 10 (5) , 494-501.

Chitpong, N., Praserthdam, P., Jongsomjit, B. A study on isosynthesis via CO hydrogenation over ZrO2-CeO2 mixed oxide catalysts. 2009. Catalysis Communications 10 (5) , 494-501.

[bis(n-(3-tert butylsalicylidene)anilinato)] titanium (IV) dichloride complex. 2011. Molecules 16 (2) , 1655-1666.

Wannaborworn, M., Praserthdam, P., Jongsomjit, B. Observation of different catalytic activity of various 1-olefins during ethylene/1-olefin copolymerization with homogeneous metallocene catalysts. 2011. Molecules 16 (1) , 373-383.

Boonoun, P., Laosiripojana, N., Muangnapoh, C., Jongsomjit, B., Panpranot, J., Mekasuwandumrong, O., Shotipruk, A. Application of sulfonated carbon-based catalyst for reactive extraction of 1,3-propanediol from model fermentation mixture. 2010. Industrial and Engineering Chemistry Research 49 (24) , 12352-12357.

Senso, N., Khaubunsongserm, S., Jongsomjit, B., Praserthdam, P. The influence of mixed activators on ethylene polymerization and ethylene/1-hexene copolymerization with silica-supported ziegler-natta catalyst. 2010. Molecules 15 (12) , 9323-9339.

Praserthdam, S., Wongmaneenil, P., Jongsomjit, B. Investigation of different modifiers for nanocrystal zirconia on W/ZrO2 catalysts via esterification. 2010. Journal of Industrial and Engineering Chemistry 16 (6) , 935-940.

Wongmaneenil, P., Jongsomjit, B., Praserthdam, P. Study on solvent/alkoxide molar ratios on synthesis zirconia nanoparticles for tungstated zirconia catalysts over esterification. 2010. Catalysis Letters 139 (1-2) , 42-49.

Wongmaneenil, P., Jongsomjit, B., Praserthdam, P. Isosynthesis via CO hydrogenation over SO4-ZrO2 catalysts. 2010. Journal of Industrial and Engineering Chemistry 16 (3) , 411-418.

Phoowakeereewiwat, S., Jongsomjit, B., Praserthdam, P. Investigation of diene addition on ethylene-propylene (EP) copolymerization with a zirconocene catalyst: Effects of diene types and E/P ratios. 2009. Journal of Materials Processing Technology 209 (1) , 520-524.

Suriye, K., Jongsomjit, B., Satayaprasert, C., Praserthdam, P. Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol-gel technique. 2008. Applied Surface Science 255 (5 PART 2) , 2759-2766.

Phoowakeereewiwat, S., Jongsomjit, B., Praserthdam, P. Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol-gel technique. 2008. Applied Surface Science 255 (5 PART 2) , 2759-2766.

Owpradit, W., Jongsomjit, B. A comparative study on synthesis of LLDPE/TiO2 nanocomposites using different TiO2 by in situ polymerization with zirconocene/dMMAO catalyst. 2008. Materials Chemistry and Physics 112 (3) , 954-961.

ROJANAPIPATKUL, S., JONGSOMJIT, B. Synthesis of cobalt on cobalt-aluminate via solvothermal method and its catalytic properties for carbon monoxide hydrogenation. 2008. Catalysis Communications 10 (2) , 232-236.

Srijumnong, S., Suttipitakwong, P., Jongsomjit, B., Praserthdam, P. Effect of supports and solvents on ethylene polymerization with titanium complex consisting of phenoxy-imine ligands/dMMAO catalytic system. 2008. Journal of Molecular Catalysis A: Chemical 294 (1-2) , 1-7.

Wongwaiwattanakul, P., Jongsomjit, B. Copolymerization of ethylene/1-octene via different pore sized silica-based-supported zirconocene/dMMAO catalysts. 2008. Catalysis Communications 10 (1) , 118-122.

Burakorn, T., Panpranot, J., Mekasuwandumrong, O., Chaisuk, C., Praserthdam, P., Jongsomjit, B. Characterization of cobalt dispersed on the mixed nanoscale

alumina and zirconia supports. 2008. Journal of Materials Processing Technology 206 (1-3) , 352-358.

Tangjituabun, K., Kim, S., Hiraoka, Y., Taniike, T., Terano, M., Jongsomjit, B., Praserthdam, P. Poisoning of active sites on ziegler-natta catalyst for propylene polymerization. 2008. Chinese Journal of Polymer Science (English Edition) 26 (5) , 547-552.

Kittiruangrayab, S., Burakorn, T., Jongsomjit, B., Praserthdam, P. Characterization of cobalt dispersed on various micro- and nanoscale silica and zirconia supports. 2008. Catalysis Letters 124 (3-4) , 376-383.

Tangjituabun, K., Yull Kim, S., Hiraoka, Y., Taniike, T., Terano, M., Jongsomjit, B., Praserthdam, P. Effects of various poisoning compounds on the activity and stereospecificity of heterogeneous Ziegler-Natta catalyst. 2008. Science and Technology of Advanced Materials 9 (2)

Pothirat, T., Jongsomjit, B., Praserthdam, P. A comparative study of SiO2- and ZrO2-supported zirconocene/MAO catalysts on ethylene/1-olefin copolymerization. 2008. Catalysis Communications 9 (6) , 1426-1431.

Bunchongturakarn, S., Jongsomjit, B., Praserthdam, P. Impact of bimodal pore MCM-41-supported zirconocene/dMMAO catalyst on copolymerization of ethylene/1-octene. 2008. Catalysis Communications 9 (5) , 789-795.

Desharun, C., Jongsomjit, B., Praserthdam, P. Study of LLDPE/alumina nanocomposites synthesized by in situ polymerization with zirconocene/d-MMAO catalyst. 2008. Catalysis Communications 9 (4) , 522-528.

Pothirat, T., Jongsomjit, B., Praserthdam, P. Effect of Zr-modified SiO2-supported metallocene/MAO catalyst on copolymerization of ethylene/1-octene. 2008. Catalysis Letters 121 (3-4) , 266-273.

Khaodee, W., Jongsomjit, B., Praserthdam, P., Goto, S., Assabumrungrat, S. Impact of temperature ramping rate during calcination on characteristics of nano-ZrO2 and its catalytic activity for isosynthesis. 2008. Journal of Molecular Catalysis A: Chemical 280 (1-2) , 35-42.

Suriye, K., Praserthdam, P., Jongsomjit, B. Effect of surface sites of TiO2 support on the formation of cobalt-support compound in Co/TiO2 catalysts. 2007. Catalysis Communications 8 (11) , 1772-1780.

Tupabut, P., Jongsomjit, B., Praserthdam, P. Impact of boron modification on MCM-41-supported cobalt catalysts for hydrogenation of carbon monoxide. 2007. Catalysis Letters 118 (3-4) , 195-202.

Jongsomjit, B., Kittiruangrayub, S., Praserthdam, P. Study of cobalt dispersion onto the mixed nano-SiO2-ZrO2 supports and its application as a catalytic phase. 2007. Materials Chemistry and Physics 105 (1) , 14-19.

Jongsomjit, B., Ngamposri, S., Praserthdam, P. Observation of bimodal polyethylene derived from TiO2-supported zirconocene/MAO catalyst during polymerization of ethylene and ethylene/1-hexene. 2007. Catalysis Letters 117 (3-4) , 177-181.

Ketloy, C., Jongsomjit, B., Praserthdam, P. Characteristics and catalytic properties of [t-BuNSiMe2Flu]TiMe2/dMMAO catalyst dispersed on various supports towards ethylene/1-octene copolymerization. 2007. Applied Catalysis A: General 327 (2) , 270-277.

Jongsomjit, B., Panpranot, J., Praserthdam, P. Effect of nanoscale SiO2 and ZrO2 as the fillers on the microstructure of LLDPE nanocomposites synthesized via in situ polymerization with zirconocene. 2007. Materials Letters 61 (6) , 1376-1379.

Khaodee, W., Jongsomjit, B., Assabumrungrat, S., Praserthdam, P., Goto, S. Investigation of isosynthesis via CO hydrogenation over ZrO2 and CeO2 catalysts: Effects of crystallite size, phase composition and acid-base sites. 2007. Catalysis Communications 8 (3) , 548-556.

Suriye, K., Praserthdam, P., Jongsomjit, B. Control of Ti3+surface defect on TiO2 nanocrystal using various calcination atmospheres as the first step for surface defect creation and its application in photocatalysis. 2007. Applied Surface Science 253 (8) , 3849-3855.

Chaichana, E., Jongsomjit, B., Praserthdam, P. Effect of nano-SiO2 particle size on the formation of LLDPE/SiO2 nanocomposite synthesized via the in situ

polymerization with metallocene catalyst. 2007. Chemical Engineering Science 62 (3) , 899-905.

Intaragamjon, N., Shiono, T., Jongsomjit, B., Praserthdam, P. Effect of α-olefins on copolymerization of ethylene and α-olefin with [t-BuNSiMe2Flu]TiMe2 catalyst. 2006. Studies in Surface Science and Catalysis 161 , 271-274.

Intaragamjon, N., Shiono, T., Jongsomjit, B., Praserthdam, P. Elucidation of solvent effects on the catalytic behaviors for [t-BuNSiMe2Flu]TiMe2 complex during ethylene/1-hexene copolymerization. 2006. Catalysis Communications 7 (9) , 721-727.

Tangjituabun, K., Jongsomjit, B., Praserthdam, P. The role of CaO in the Ziegler-Natta catalyst for propylene polymerization. 2006. Catalysis Letters 109 (3-4) , 147-152.

Jongsomjit, B., Wongsalee, T., Praserthdam, P. Catalytic behaviors of mixed TiO2-SiO2-supported cobalt Fischer-Tropsch catalysts for carbon monoxide hydrogenation. 2006. Materials Chemistry and Physics 97 (2-3) , 343-350.

Jongsomjit, B., Sakdamnuson, C., Panpranot, J., Praserthdam, P. Role of ruthenium in the reduction behavior of ruthenium-promoted cobalt/titania Fischer-Tropsch catalysts. 2006. Reaction Kinetics and Catalysis Letters 88 (1) , 65-71.

Wongsalee, T., Jongsomjit, B., Praserthdam, P. Effect of zirconia-modified titania consisting of different phases on characteristics and catalytic properties of Co/TiO2 catalysts. 2006. Catalysis Letters 108 (1-2) , 55-61.

Panpranot, J., Taochaiyaphum, N., Jongsomjit, B., Praserthdam, P. Differences in characteristics and catalytic properties of Co catalysts supported on micron- and nano-sized zirconia. 2006. Catalysis Communications 7 (3) , 192-197.

Jongsomjit, B., Phoowakeereewiwat, S., Thongyai, S., Shiono, T., Praserthdam, P. Impact of diene addition on properties for ethylene-propylene copolymerization with rac-Et[Ind]2ZrCl2/MAO catalyst. 2005. Materials Letters 59 (28) , 3771-3774.

Jongsomjit, B., Ngamposri, S., Praserthdam, P. Application of silica/titania mixed oxide-supported zirconocene catalyst for synthesis of linear low-density polyethylene. 2005. Industrial and Engineering Chemistry Research 44 (24) , 9059-9063.

JONGSOMJIT, B., WONGSALEE, T., PRASERTHDAM, P. Characteristics and catalytic properties of Co/TiO2 for various rutile: Anatase ratios. 2005. Catalysis Communications 6 (11) , 705-710.

Suriye, K., Praserthdam, P., Jongsomjit, B. Impact of Ti3+ present in titania on characteristics and catalytic properties of the Co/TiO2 catalyst. 2005. Industrial and Engineering Chemistry Research 44 (17) , 6599-6604.

Jongsomjit, B., Wongsalee, T., Praserthdam, P. Study of cobalt dispersion on titania consisting various rutile:anatase ratios. 2005. Materials Chemistry and Physics 92 (2-3) , 572-577.

Jongsomjit, B., Ngamposri, S., Praserthdam, P. Role of titania in TiO2-SiO2 mixed oxides-supported metallocene catalyst during ethylene/1-octene copolymerization. 2005. Catalysis Letters 100 (3-4) , 139-146.

Jongsomjit, B., Ngamposri, S., Praserthdam, P. Catalytic activity during copolymerization of ethylene and 1-hexene via mixed TiO2/SiO2-supported MAO with rac-Et[Ind] 2ZrCl2 metallocene catalyst. 2005. Molecules 10 (6) , 672-678.

Jongsomjit, B., Chaichana, E., Praserthdam, P. LLDPE/nano-silica composites synthesized via in situ polymerization of ethylene/1-hexene with MAO/metallocene catalyst. 2005. Journal of Materials Science 40 (8) , 2043-2045.

Jongsomjit, B., Sakdamnuson, C., Praserthdam, P. Dependence of crystalline phases in titania on catalytic properties during CO hydrogenation of Co/TiO2 catalysts. 2005. Materials Chemistry and Physics 89 (2-3) , 395-401.

Jongsomjit, B., Kaewkrajang, P., Praserthdam, P. Effect of silane-modified silica/MAO-supported Et[Ind]2ZrCl 2 metallocene catalyst on copolymerization of ethylene. 2004. European Polymer Journal 40 (12) , 2813-2817.

Jongsomjit, B., Kaewkrajang, P., Shiono, T., Praserthdam, P. Supporting effects of silica-supported methylaluminoxane (MAO) with zirconocene catalyst on ethylene/1-olefin copolymerization behaviors for linear low-density polyethylene (LLDPE) production. 2004. Industrial and Engineering Chemistry Research 43 (24) , 7959-7963.

Jongsomjit, B., Praserthdam, P., Kaewkrajang, P. A comparative study on supporting effect during copolymerization of ethylene/1-olefins with silica-supported zirconocene/MAO catalyst. 2004. Materials Chemistry and Physics 86 (2-3) , 243-246.

Jongsomjit, B., Kaewkrajand, P., Wanke, S., Praserthdam, P. Erratum: A comparative study of ethylene/α-olefin copolymerization with silane-modified silica-supported MAO using zirconocene catalysts (Catalysis Letters 94:3-4). 2004. Catalysis Letters 95 (3-4) , 219.

Jongsomjit, B., Kaewkrajang, P., Wanke, S., Praserthdam, P. A comparative study of ethylene/α-olefin copolymerization with silane-modified silica-supported MAO using zirconocene catalysts. 2004. Catalysis Letters 94 (3-4) , 205-208.

Jongsomjit, B., Sakdamnuson, C., Goodwin Jr, J., Praserthdam, P. Co-support compound formation in titania-supported cobalt catalyst. 2004. Catalysis Letters 94 (3-4) , 209-215.

Jongsomjit, B. Effect of zirconia-modified alumina on the properties of Co/γ -Al2O3 catalysts. 2003. Journal of Catalysis 215 (1) , 66-77.

Jongsomjit, B. Co-support compound formation in Co/Al2O3 catalysts: Effect of reduction gas containing CO. 2002. Catalysis Today 77 (3) , 191-204.

Jongsomjit, B., Panpranot, J., Goodwin, J. Co-support compound formation in alumina-supported cobalt catalysts. 2001. Journal of Catalysis 204 (1) , 98-109.