Selective methanation of carbon monoxide in hydrogen rich stream over Ni/CeO۲ nanocatalysts

نویسندگانبهزاد نعمت الهی-مهران رضائی-ابراهیم نعمتی لای
نشریهJ RARE EARTH
نوع مقالهFull Paper
تاریخ انتشار۲۰۱۵-۴-۰۱
رتبه نشریهISI
نوع نشریهچاپی
کشور محل چاپدانمارک
نمایه نشریهISI ,SCOPUS

چکیده مقاله

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 ºC. 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.