Inhibition of methane formation in steam reforming reactions through modification of Ni catalyst and the reactants

CORC > 兰州化学物理研究所 > 中国科学院兰州化学物理研究所 > OSSO国家重点实验室

	Inhibition of methane formation in steam reforming reactions through modification of Ni catalyst and the reactants
	Lv GX(吕功煊); Lv GX(吕功煊)
刊名	Green Chemistry
	2009
卷号	11 页码:724-732
ISSN号	1463-9262
通讯作者	吕功煊
中文摘要	Methane, a greenhouse gas and a main by-product in steam reforming reaction, can greatly diminish hydrogen yield. Modifications of both the catalyst and reactants were performed in this study to suppress methane formation. Ni/Al2O3 catalysts modified with a series of promoters (Li, Na, K, Mg, Fe, Co, Zn, Zr, La, Ce) were evaluated in acetic acid reforming reaction. The addition of Co, Zr, La, or Ce to Ni/Al2O3 promoted the methanation reaction, and consequently promoted methane formation. Conversely, alkali metal modified samples effectively inhibited methane formation, especially the Ni–K/Al2O3 catalyst. Moreover, the addition of alkali metal remarkably increased the number of metallic Ni sites on the catalyst surface by promoting the reduction of Ni oxides, which enhanced the catalytic activity. In addition, the presence of K on alumina also promoted stability of the Ni catalyst through suppression of coke formation. Type of fuels reformed also affected methane formation. Methane selectivity was much higher in steam reforming of the neutral fuels (ethanol, 1-propanol) than in steam reforming of the acidic fuels (acetic acid, propanoic acid). Acidification of neutral alcohols with nitric acid remarkably suppressed methane formation, which was accomplished through the suppression of the methanation reaction. Besides, the addition of nitric acid to ethanol can help eliminate coke deposition in ethanol reforming reactions, since production of the main carbon precursor, ethylene, is suppressed to a significant extent in the presence of nitric acid.
学科主题	环境催化与清洁能源
收录类别	SCI
资助信息	the 973 Project of China (No. G 2003CB214503;2007CB613305;2009CB220003)
语种	英语
WOS记录号	WOS:000266004400022
公开日期	2012-09-21
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/530]
专题	兰州化学物理研究所_OSSO国家重点实验室兰州化学物理研究所_ERC国家工程研究中心
通讯作者	Lv GX(吕功煊); Lv GX(吕功煊)
推荐引用方式 GB/T 7714	Lv GX,Lv GX. Inhibition of methane formation in steam reforming reactions through modification of Ni catalyst and the reactants[J]. Green Chemistry,2009,11:724-732.
APA	吕功煊,&吕功煊.(2009).Inhibition of methane formation in steam reforming reactions through modification of Ni catalyst and the reactants.Green Chemistry,11,724-732.
MLA	吕功煊,et al."Inhibition of methane formation in steam reforming reactions through modification of Ni catalyst and the reactants".Green Chemistry 11(2009):724-732.