Ni-Mg-Al solid basic layered double oxide catalysts prepared using surfactant-assisted coprecipitation method for CO2 reforming of CH4

作者：Tan, Pengjia; Gao, Zhihua; Shen, Chaofeng; Du, Yali; Li, Xiaodong; Huang, Wei^*

来源：Chinese Journal of Catalysis, 2014, 35(12): 1955-1971.

DOI：10.1016/S1872-2067(14)60171-6

• Surfactant
• Coprecipitation method
• Nickel
• Magnesium aluminum oxide
• Methane
• Carbon dioxide
• Reforming

Ni-Mg-Al solid basic catalysts for CO2 reforming of CH4 were prepared using a surfactant-assisted coprecipitation method. The preferred orientations of the surfactants on the Ni(111) and Ni(200) crystal planes were investigated. The catalytic performance of the surfactant-modified catalysts was tested at 800 degrees C. The cetyltrimethylammonium bromide (CTAB)-modified catalyst (CB-LDO; LDO = layered double oxide) was further studied at various reaction temperatures. All the catalysts were characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, temperature-programmed reduction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy, and temperature-programmed oxidation. The results show that growth of the Ni(200) plane is promoted by tetrapropylammonium hydroxide and restrained by P123, PVP, and CTAB. The crystallinity degree of Ni(200) plays a key role in the activation of CH4. The CB-LDO catalysts retain high activities and stabilities, because of the crystal phase transformation at high temperature during the reaction; this leads to the formation of spinel NiAl2O4 and exposure of the Ni(200) crystal plane.

• 出版日期2014-12
• 单位太原理工大学; 中国航天科工集团公司