Effects and control of steam in the systems of methanol and DME synthesis from syngas over Cu-based catalysts

	Effects and control of steam in the systems of methanol and DME synthesis from syngas over Cu-based catalysts
	Luan, Youshun; Xu, Hengyong; Yu, Chunying; Li, Wenzhao; Hou, Shoufu
刊名	catalysis letters
	2008-10-01
卷号	125 期号:3-4 页码:271-276
关键词	steam methanol DME synthesis syngas nano-silica alcohol pre-treatment
通讯作者	徐恒泳
产权排序	1;1
英文摘要	effects of steam in the systems of methanol synthesis over cuznoal(2)o(3) catalyst and one-step dme synthesis over cuznoal(2)o(3)/gamma-al(2)o(3)-hzsm-5 were investigated, respectively. the results showed that there were two different effects in both systems: for the former (methanol synthesis), a little steam (< 10%) in the feed gas increased the catalytic activity and stability; for the latter (dme synthesis) where steam was created significantly, presence of steam in the feed gas accelerated sintering of cu particles and deactivation velocity. the results of hydro-thermal treatment of pre-reduced cuznoal(2)o(3) catalyst showed that high temperature (> 240 degrees c) and high steam content (> 10%) can greatly enhance the sintering velocity of cu crystalline. commercial nano-sio(2) and nano-al(2)o(3) with high surface area were utilized to control the steam concentration in the system of one-step dme synthesis. owing to their hydrophilic surface, however, neither of them depressed the deactivation velocity effectively. the pre-treatment of nano-sio(2) support with alcohol can change the surface of the support from hydrophilic to hydrophobic property, which can be found to control the steam surrounding the active metallic cu and keep the catalytic stability.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	dimethyl ether ; hybrid catalysts ; synthesis gas ; cu/zno/al2o3 ; temperature ; support ; zsm-5
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000259412500016
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/100681]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Luan, Youshun,Xu, Hengyong,Yu, Chunying,et al. Effects and control of steam in the systems of methanol and DME synthesis from syngas over Cu-based catalysts[J]. catalysis letters,2008,125(3-4):271-276.
APA	Luan, Youshun,Xu, Hengyong,Yu, Chunying,Li, Wenzhao,&Hou, Shoufu.(2008).Effects and control of steam in the systems of methanol and DME synthesis from syngas over Cu-based catalysts.catalysis letters,125(3-4),271-276.
MLA	Luan, Youshun,et al."Effects and control of steam in the systems of methanol and DME synthesis from syngas over Cu-based catalysts".catalysis letters 125.3-4(2008):271-276.