A highly active and stable chromium free iron based catalyst for H2 purification in high temperature water gas shift reaction

被引：17

作者：

Meshkani, Fereshteh ^{[1
]}

Rezaei, Mehran ^{[1
,2
]}

机构：

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

[2] Univ Kashan, Inst Nanosci & Nanotechnol, Kashan, Iran

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 32期

关键词：

Cr-free catalyst; Fe2O3; Nanostructure; Iron based; Water-gas shift; PROMOTER; REMOVAL; OXIDE; CO; CU;

D O I：

10.1016/j.ijhydene.2014.08.092

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 mesoporous nanocrystalline chromium free Fe-Al-Ni catalysts with various Fe/Al and Fe/Ni ratios were prepared by coprecipitation method for high temperature water gas shift reaction. The prepared catalysts were characterized using X-ray diffraction (XRD), N-2 adsorption (BET), temperature-programmed reduction (TPR) and transmission electron microscopy (TEM) techniques. The catalytic results revealed that the catalyst with Fe/Al = 10 and Fe/Ni = 5 weight ratios exhibited the highest catalytic activity among the prepared catalysts and the commercial chromium containing one. This catalyst possessed a high surface area of 177.4 m(2) g(-1) with an average pore size of 4.3 nm with a high stability during 20 h time on stream. Furthermore, the effect of calcination temperature, GHSV and steam/gas ratio on the structural properties and catalytic performance of the catalyst with the highest activity was investigated. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：18302 / 18311

页数：10

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