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| 1 | Ti-Si composite oxide-supported cobalt catalysts for CO_2 hydrogenation显示文摘In the present work, different silica-based supported cobalt (Co) catalysts were synthesized and used for CO2 hydrogenation for methanation. Different supports, such as SSP, MCM-41, TiSSP and TiMCM were used to prepare Co catalysts with 20 wt% Co loading. The supports and catalysts were characterized by means of N2 physisorption, XRD, SEM/EDX, XPS, TPR and CO chemisorption. It is found that after calcination of catalysts, Ti is present in the form of anatase. The introduction of Ti plays important roles in the properties of Co catalysts by:(i) facilitating the reduction of Co oxides species which are strongly interacted with support, (ii) preventing the formation of silicate compounds, and (iii) inhibiting the RWGS reaction. Based on CO2 hydrogenation, the CoTiMCM catalyst exhibites the highest activity and stability. | Jakrapan Janlamool Piyasan Praserthdam Bunjerd Jongsomjit | 2011 | Journal of Natural Gas Chemistry2011，20，5： | 4 |
| 2 | Effect of zirconia-modified alumina on the properties of Co/γ-Al2O3 catalysts显示文摘 | Jongsomjit Bunjerd Panpranot Joongjai Goodwin James G Jr | 2003 | Journal of Catalysis2003，215，1： | 1 |
| 3 | Effect of zirconia-modified alumina on the properties of Co/γ-A12O3 catalysts 显示文摘 | Jongsomjit Bunjerd Panpranot Joongjai James G Goodwin Jr | 2003 | Journal of Catalysis2003，215，1： | 1 |
| 4 | Cu/Mg-Al水滑石催化剂用于乙醇的氧化脱氢:乙醇浓度和还原条件的影响显示文摘目的:对现有的乙醇氧化脱氢体系中Mg-Al催化剂进行改进,以期获得更高的收率和产物选择性。创新点:1.制备Cu改性的Mg-Al催化剂用于乙醇氧化脱氢反应,获得了更高的乙醛收率和选择性;2.Cu/Mg-Al催化剂制备方法简单,制备价格低廉(无需贵金属),制备条件温和(无需高温高压);3.Cu/Mg-Al催化剂在使用前无需预还原。方法:1.采用共沉淀法和浸渍法制备Cu/Mg-Al催化剂;2.通过乙醇氧化脱氢反应对催化剂进行考评,以探究Cu改性、乙醇浓度和催化剂的还原条件对催化活性的影响。结论:1.与Mg-Al催化剂相比,经由Cu改性的Mg-Al催化剂的乙醇氧化脱氢活性显著提高;在350℃,乙醛最大收率为41.8%。2.进料气中水的存在(乙醇浓度下降)会对Cu/Mg-Al的催化性能产生不利影响,使得乙醇转化率和乙醛收率下降;但在高温区间(350~400℃),这个不利影响有所减弱。3.反应前,催化剂在氢气气氛下的还原步骤对Cu/Mg-Al催化活性的影响不明显。 | Piriya PINTHONG Piyasan PRASERTHDAM Bunjerd JONGSOMJIT | 2020 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2020，21，3： | 1 |
| 5 | Effect of zirconia-modified alumina on the properties of Co/ γ -Al 2 O 3 catalysts显示文摘 | Bunjerd Jongsomjit Joongjai Panpranot James G Goodwin | 2003 | Journal of Catalysis2003，，1： | 1 |
| 6 | LLDPE/TiO_2 nanocomposites produced from different crystallite sizes of TiO_2 via in situ polymerization显示文摘Nano-TiO2 particles with a range of crystallite sizes were synthesized by a conventional sol-gel method,and then used as nanoparticle substrates in the synthesis of LLDPE/TiO2 nanocomposites via in situ polymerization of ethylene/1-hexene with zirconocene/MMAO catalyst.It was found that the size of the nano-TiO2 crystallite nanoparticles can influence the catalytic activity in the polymerization system.The larger nano-TiO2 crystallites provided better catalytic activity in the polymerization system due to more space for monomer attack.In addition,by thermo-gravimetric analysis,it can be seen that the larger nano-TiO2 crystallites also exhibited lower interaction with available MMAO.Consequently,the MMAO reacted more efficiently with the zirconocene catalyst during the activation process,and enhanced polymerization catalysis.All the polymer nanocomposites products did not have well defined melting temperature indicating non-crystalline polymers.This is due to the high amount of hexene incorporation(based on 13C NMR).The difference in crystallite sizes of the nano-TiO2 also affected how 1-hexene became incorporated into the polymer nanocomposites.The smaller crystallite size of nano-TiO2 allowed greater 1-hexene incorporation due to depression of the reactivity of the ethylene.The contribution of this work helps develop a better understanding of the role of nano-TiO2 in the catalytic activity of the polymerization system and in the microstructure of the polymer composite product.However,this study only considers work on the laboratory scale,so for commercial application of these results,it is necessary to scale up the polymerization process.It is only at this stage,that other physical properties,such as the mechanical properties of these materials can be sensibly determined. | CHAICHANA Ekrachan PATHOMSAP Somsakun MEKASUWANDUMRONG Okorn PANPRANOT Joongjai SHOTIPRUK Artiwan JONGSOMJIT Bunjerd | 2012 | Chinese Science Bulletin2012，57，17： | 1 |
| 7 | Liquid-phase selective hydrogenation of 1-heptyne over Pd / TiOz cata- lyst synthesized by one-step flame spray pyrolysis 显示文摘 | Okom M Songphon P Bunjerd J | 2010 | Catalysis Letters2010，136，12： | 1 |
| 8 | Solvent effect on synthesis of zirconia support for tungstated zirconia catalysts显示文摘 | PEANGPIT W BUNJERD J PIYASAN P | 2010 | Journal of Industrial and Engineering Chemistry2010，16，2： | 1 |
| 9 | 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 显示文摘 | KONGKIAT S BUNJERD J CHAIRIT S | 2007 | Appl Surf Sci2007，253，8： | 1 |
| 10 | Surface defect (Ti3+) controlling in the first step on the anatase TiO2 nanocrystal by using sol-gel technique 显示文摘 | KONGKIAT S BUNJERD J CHAIRIT S | 2008 | Appl Surf Sci2008，255，5： | 1 |
| 11 | Investigation of isosynthesis via CO hydrogenation over ZrO 2 and CeO 2 catalysts: Effects of crystallite size, phase composition and acid–base sites显示文摘 | Watcharapong Khaodee Bunjerd Jongsomjit Suttichai Assabumrungrat Piyasan Praserthdam Shigeo Goto | 2006 | Catalysis Communications2006，，3： | 1 |
| 12 | Synergistic Effects of the ZnCl_2-SiCl_4 Modified TiCl_4/MgCl_2/THF Catalytic System on Ethylene/1-Hexene and Ethylene/1-Octene Copolymerizations显示文摘The copolymerizations of ethylene with 1-hexene or 1-octene by using TiCl4 /MgCl2 /THF catalysts modified with different metal halide additives(ZnCl2, SiCl4, and the combined ZnCl2-SiCl4) were investigated based on catalytic activity and copolymer properties. It was found that the catalyst modified with mixed ZnCl2-SiCl4 revealed the highest activities for both ethylene/1-hexene and ethylene/1-octene copolymerization. The increase in activities was due to the formation of acidic sites by modifying the catalysts with Lewis acids. Based on the FTIR measurements, the characteristic C―O―C peaks of the catalysts modified with metal halide additives were slightly shifted to lower wavenumber when compared to the unmodified catalyst. This showed that the modified catalysts could generate more acid sites in the TiCl4 /MgCl2 /THF catalytic system leading to an increase in activities as well as comonomer insertion(as proven by13C-NMR). However, Lewis acidmodifications did not affect the microstructure of the copolymers obtained. By comparison on the properties of copolymers prepared with the unmodified catalyst, it was found that polymers with ZnCl2 and/or SiCl4 modification exhibited a slight decrease in melting temperature, crystallinity and density. It is suggested that these results were obtained based on the different amount of α-olefins insertion, regardless of the types of Lewis acids and comonomer. | Wanna Phiwkliang Bunjerd Jongsomjit Piyasan Praserthdam | 2014 | Chinese Journal of Polymer Science2014，32，1： | 1 |
| 13 | Co-support compound formation in Co/Al 2 O 3 catalysts: effect of reduction gas containing CO显示文摘 | Bunjerd Jongsomjit James G Goodwin | 2002 | Catalysis Today2002，，3： | 1 |
| 14 | Transesterifica- tion of palm oil and esterification of palm fatty acid in near-and super-critical methanol with SO4 - ZrO2 cata- lysts显示文摘 | Akaraphol P Navadd L Bunjerd J | 2010 | Fuel2010，89，9： | 1 |
| 15 | POISONING OF ACTIVE SITES ON ZIEGLER-NATTA CATALYST FOR PROPYLENE POLYMERIZATION显示文摘The effects of poisoning materials on catalytic activity and isospecificity of the supported Ziegler-Natta catalyst were investigated.A minor amount of simple structure of Lewis base,i.e.,methanol,acetone,ethyl acetate,was introduced into the catalyst slurry for partial poisoning catalytic active centers.It was found that the variations in deactivation power were in the order of methanol>acetone>ethyl acetate.The kinetic investigation via stopped-flow polymerization showed that poisoning compounds caused... | Kitti Tangjituabun Sang Yull Kim Yuichi Hiraoka Toshiaki Taniike Minoru Terano Bunjerd Jongsomjit Piyasan Praserthdam | 2008 | Chinese Journal of Polymer Science2008，26，5： | 0 |
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