Phase Composition of Ni/Mg1-xNixO as a Catalyst Prepared for Selective Methanation of CO in H-2-Rich Gas

作者：Zhang, Mengmeng; Ma, Hongwei; Gao, Zhiming^*

来源：Journal of Nanomaterials, 2015, 2015: 790857.

DOI：10.1155/2015/790857

• PARTIAL OXIDATION
• NI/MGO CATALYSTS
• MGO
• TEMPERATURE
• REMOVAL
• PERFORMANCE

Supported Ni catalysts Ni/Mg1-xNix O were prepared by reducing samples NiO-MgO in H-2/N-2 mixture gas at 500 degrees C similar to 800 degrees C for selective methanation of CO in H-2 -rich gas (CO-SMET). The samples NiO-MgO were obtained by heating water slurry of MgO and Ni(NO3)(2) in a rotary evaporator at 80 degrees C and a final calcination in air at 400 degrees C similar to 800 degrees C. X-ray diffraction (XRD) and temperature programmed reduction (TPR) measurements demonstrate that the samples NiO-MgO were composed of solid solution Mg1-gamma Ni gamma O as the main phase and a minor amount of NiO at calcination temperature of 400 degrees C, and amount of the NiO was decreased as calcination temperature increased. Phase composition of the catalysts Ni/Mg1-x Ni-x O was estimated by the Rietveld method. Effects of reduction temperature, feed Ni/Mg ratio, and calcination temperature on phase composition and catalytic activity of the catalysts were investigated. It is clear that CO conversion was generally enhanced by an increased amount of metallic Ni of the catalysts.

• 出版日期2015
• 单位北京理工大学