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题名: Effect of support and acidity of catalyst on direct oxidation of ethylene to acetic acid
作者: Zhang, JL;  Wang, XP;  Cai, TX;  Cheng, MJ;  Bao, XH
关键词: palladium ;  acid ;  silica ;  activated carbon ;  acid clay ;  supported catalyst ;  ethylene ;  oxidation ;  acetic acid
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2002-05-01
卷: 23, 期:3, 页:203-206
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: The direct oxidation of ethylene to acetic acid over Pd-acid/support catalysts in a fixed-bed reactor was studied The results showed that when the phospho-tungstic acid ( H3PW12), phospho-molybdic acid (H3PMo12) I phosphoric acid, sulfuric acid, silicotungstic acid (H4SiW12) or its soldium salts were supported on Pd/SiO2, the acid strength influences the catalytic activity strongly, and the catalyst with stronger acid strength has higher activity. The acidity of Pd-H4SiW12 catalysts supported respectively on SiO2, activated carbon (AC), and acid clay (ACy) was characterized by NH3-TPD and i-C3H7OH dehydration. The results showed that the supports affect the catalytic activity through influencing the acid strength. The more the strong acid sites on catalyst, the higher the catalytic activity. When the silica, AC or ACy was used as support, the influence of Pd dispersion determined by hydrogen adsorption on the catalytic activity can not be observed. Therefore, it can be deduced that the decisive factor to the activity of catalysts is the acid strength but not the Pet dispersion.
关键词[WOS]: HETEROPOLY
语种: 英语
WOS记录号: WOS:000176236500004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139045
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Zhang, JL,Wang, XP,Cai, TX,et al. Effect of support and acidity of catalyst on direct oxidation of ethylene to acetic acid[J]. CHINESE JOURNAL OF CATALYSIS,2002,23(3):203-206.
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