Selective methanation of carbon monoxide in hydrogen rich stream over Ni/CeO2 nanocatalysts

被引：56
|
作者：
Nematollahi, Behzad [1 ]
Rezaei, Mehran [1 ,2 ]
Lay, Ebrahim Nemati [1 ]
机构：
[1] Univ Kashan, Fac Engn, Dept Chem Engn, Catalyst & Adv Mat Res Lab, Kashan, Iran
[2] Univ Kashan, Inst Nanosci & Nanotechnol, Kashan, Iran
来源：
JOURNAL OF RARE EARTHS | 2015年 / 33卷 / 06期
基金：
美国国家科学基金会;
关键词：
methanation; nickel; cerium oxide; high surface area; carbon monoxide; rare earths; CATALYTIC-HYDROGENATION; NI-CEO2; CATALYSTS; CO2; METHANATION; NICKEL-CERIA; GAS; PERFORMANCE; OXIDATION; SYNGAS; PHASE;
D O I：
10.1016/S1002-0721(14)60462-2
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
In the present work, selective methanation of carbon monoxide in hydrogen rich stream was investigated over Ni/CeO2 nanocatalysts. The obtained results revealed that increasing in nickel loading decreased the BET surface area, pore volume and nickel dispersion. The 25% Ni/CeO2 with a NiO crystal size of 12 nm exhibited the highest activity in CO methanation reaction and reached to maximum CO conversion and CH4 selectivity at temperatures above 230 degrees C. The catalytic results revealed that CO selective methanation well progressed at lower temperatures while CO2 methanation was completely suppressed until CO conversion reached to maximum value.
引用
收藏
页码：619 / 628
页数：10
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