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. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论