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题名: Effective silica supported Sb-V mixed oxide catalyst for selective oxidation of methanol to formaldehyde
作者: Zhang, Haidong1;  Liu, Zhimin1;  Feng, Zhaochi1;  Li, Can1
关键词: Sb-V mixed oxide ;  Selective oxidation ;  Methanol ;  Formaldehyde
刊名: JOURNAL OF CATALYSIS
发表日期: 2008-12-10
DOI: 10.1016/j.jcat.2008.09.019
卷: 260, 期:2, 页:295-304
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Silica supported Sb-V mixed oxide catalysts (VSbO(x)/SiO(2)) were prepared and evaluated in methanol selective oxidation. One-pass yield of formaldehyde at 91% was obtained on one VSbO(x)/SiO(2) catalyst. The active phase of VSbO(x)/SiO(2) catalysts is found to be Sb-V mixed oxide, in which isolated VO(x) species can be stabilized. The relative amount of monomeric VO(x) species in VSbO(x)/SiO(2) catalyst is higher than pure supported VO(x) catalyst. On VSbO(x)/SiO(2) catalyst, the deep oxidation of intermediates is greatly depressed because the formation of adsorbed acyl species, which leads to CO(x). is not favored. The average oxidation state of the vanadium in VSbO(x)/SiO(2) catalysts increases with decreasing Sb/V ratio. Higher oxidation state of the vanadium in VSbO(x)/SiO(2) catalysts is found to be relevant to higher activity while V(4+) species are more selective to formaldehyde, Sb-V mixed oxide catalyst provides a possibility to adjust the production distribution in methanol selective oxidation by changing Sb/V ratio. (C) 2008 Elsevier Inc. All rights reserved.
关键词[WOS]: MOLYBDENUM OXIDE ;  SBOX/SIO2 CATALYSTS ;  ACTIVE-SITES ;  SURFACE ;  SPECTROSCOPY ;  PERFORMANCE ;  PROPANE ;  SBA-15 ;  DEHYDROGENATION ;  REACTIVITY
语种: 英语
WOS记录号: WOS:000261705200011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141058
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Haidong,Liu, Zhimin,Feng, Zhaochi,et al. Effective silica supported Sb-V mixed oxide catalyst for selective oxidation of methanol to formaldehyde[J]. JOURNAL OF CATALYSIS,2008,260(2):295-304.
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