Chinese Journal of Catalysis ›› 2013, Vol. 34 ›› Issue (2): 330-335.DOI: 10.1016/S1872-2067(11)60485-3

• Research papers • Previous Articles     Next Articles

Effects of composite oxide supports on catalytic performance of Ni-based catalysts for CO methanation

ZHANG Han1, DONG Yunyun2, FANG Weiping2,a, LIAN Yixin2,b   

  1. 1Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China; 2Department of Chemistry, College of Chemistry and Chemical Engineering, National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2012-09-21 Revised:2012-11-12 Online:2013-02-05 Published:2013-02-05

Abstract: Metal-oxide-modified NiO/Al2O3 catalysts for methanation of CO were prepared using a modified grinding-mixing method and characterized using X-ray diffraction, transmission electron microscopy, N2 adsorption-desorption isotherms, temperature-programmed reduction by H2, temperature-programmed desorption by H2, Raman spectroscopy, and X-ray photoelectron spectroscopy. The results show that the activity of an MgO-modified NiO/Al2O3 catalyst is better than those of NiO/ZrO2-Al2O3 and NiO/SiO2-Al2O3 in the reaction temperature range 300–700 °C. The incorporation of a metal oxide into NiO/Al2O3 was found to weaken Ni–Al interactions, leading to generation of large numbers of active Ni species, and this was confirmed to be responsible for the improvement in the performances of the catalysts in the methanation reaction.

Key words: carbon monoxide, methanation, nickel-based catalyst, syngas, mixed oxide support