CO methanation over Ni catalysts supported on high surface area mesoporous nanocrystalline γ-Al2O3 for CO removal in H2-rich stream

被引：81

作者：

Alihosseinzadeh, Amir ^{[1
]}

Nematollahi, Behzad ^{[2
]}

Rezaei, Mehran ^{[2
]}

Lay, Ebrahim Nemati ^{[2
]}

机构：

[1] Univ Tehran, Coll Engn, Sch Chem Engn, Tehran, Iran

[2] Univ Kashan, Fac Engn, Dept Chem Engn, Catalyst & Adv Mat Res Lab, Kashan, Iran

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2015年 / 40卷 / 04期

基金：

美国国家科学基金会;

关键词：

Ni supported catalysts; Gamma alumina; CO methanation; Ni active sites; SELECTIVE METHANATION; NI/AL2O3; CATALYSTS; CARBON-MONOXIDE; NATURAL-GAS; NICKEL; PERFORMANCE; SYNGAS; OXIDATION; STEAM;

D O I：

10.1016/j.ijhydene.2014.11.138

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this work, nickel catalysts supported on mesoporous nanocrystalline gamma alumina with high surface area were prepared and employed in CO methanation reaction. The prepared samples were characterized by XRD, BET, SEM, TEM, TPD and TPR techniques. The results showed that the optimized gamma-Al2O3 possessed a mesoporous nanocrystalline structure with a high surface area of 328 m(2) g(-1). The catalytic results revealed that 25 wt.% Ni/Al2O3 catalyst exhibited the highest catalytic activity and showed 100% CO conversion at temperatures as low as 240 C. This catalyst exhibited the high stability for CO conversion and CH4 selectivity during 120 h time on stream at 240 degrees C. In addition, the effect of GHSV, CO:H-2 ratio and the effect of CO2 and H2O on the catalytic performance of Ni/Al2O3 catalysts in CO methanation reaction was investigated. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：1809 / 1819

页数：11

共 33 条

[31] Nickel on a macro-mesoporous Al2O3@ZrO2 core/shell nanocomposite as a novel catalyst for CO methanation [J].