We studied the catalytic hydrogenation of CO2 to methane using nickel-niobia composite catalysts. Catalysts containing 10-70 wt% Ni were synthesized by wet impregnation and tested for CO 2 hydrogenation in a flow reactor. 40 wt% was found to be the optimum Ni loading, which resulted in CO2 conversion of 81% at 325 degrees C. We also calcined the Nb2O5 support at different temperatures to study the influence of calcination temperature on the catalytic performance. 40 wt% Ni loaded on Nb-2 O-5, which was calcined at 700 degrees C gave higher methanation activity (91% conversion of CO2). Time on stream study for 50 h showed a stable activity and selectivity; thus confirming the scope for practical application. (C) 2018 Published by Elsevier Ltd.
1.Univ Amsterdam, Vant Hoff Inst Mol Sci, POB 94157, NL-1090 GD Amsterdam, Netherlands 2.Indian Inst Sci, Ctr Nano Sci & Engn, Bangalore, Karnataka, India 3.Univ Liverpool, Dept Chem, Liverpool L69 7ZD, Merseyside, England 4.Univ Alicante, Lab Mat Avanzados, Inst Univ Mat Alicante, Dept Quim Inorgan, Apartado 99, E-03080 Alicante, Spain
Recommended Citation:
Gnanakumar, Edwin S.,Chandran, Narendraraj,Kozhevnikov, Ivan V.,et al. Highly efficient nickel-niobia composite catalysts for hydrogenation of CO2 to methane[J]. CHEMICAL ENGINEERING SCIENCE,2019-01-01,194:2-9