Chinese Journal of Catalysis ›› 2012, Vol. 33 ›› Issue (7): 1176-1182.DOI: 10.3724/SP.J.1088.2012.20138

• Research papers • Previous Articles     Next Articles

Pre-reforming of Liquefied Petroleum Gas over Magnesium Aluminum Mixed Oxide Supported Nickel Catalysts

WANG Xinxing, WANG Xueguang*, SHANG Xingfu, NIE Wangxin, ZOU Xiujing, LU Xionggang, DING Weizhong   

  1. Shanghai Key Laboratory of Modern Metallurgy and Material Processing, Shanghai University, Shanghai 200072, China
  • Received:2012-01-16 Revised:2012-02-24 Online:2012-06-21 Published:2012-06-21

Abstract: The catalytic performance of Ni catalysts supported on magnesium aluminum mixed oxide (Ni/MgmAl) for the pre-reforming of liquefied petroleum gas (LPG) was studied, and the catalysts were prepared by the co-precipitation-impregnation method and calcined in the lower temperature range of 400–700 oC. The X-ray diffraction and H2 temperature-programmed reduction results showed that Ni species were highly dispersed on the catalyst surface without NiAl2O4 spinel formation. The Ni/MgmAl catalysts could be reduced to metallic Ni nanoparticles at 650 oC, which showed excellent catalytic activity and stability for LPG pre-reforming at 400 oC and a low steam/carbon molar ratio of 2.0. The effects of Mg/Al molar ratios, Ni loading, and calcination temperature of the support and catalyst on the catalytic behavior of the Ni/MgmAl catalysts were investigated in detail. The results revealed that the 15%Ni/Mg1.25Al catalyst with both support and catalyst calcined at 500 oC had the optimal catalytic performance for LPG pre-reforming. Compared with Ni/MgmAl catalysts calcined at high temperature (≥ 800 oC), the present catalysts showed easier coke deposition and a slight decrease in catalytic activity and stability. However, it may be more promising candidate for LPG pre-reforming for the use of hydrogen fuel cells in transportation and small stationary application due to lower reduction temperature.

Key words: nickel catalyst, magnesium aluminum mixed oxide, liquefied petroleum gas, pre-reforming, steam reforming