Influence of rare earth promoters on the performance of Ni/Mg(Al)O catalysts for hydrogenation and steam reforming of toluene

稀有金属（英文版）, 2009, 25(6): 582-589. doi: 10.1007/s12598-009-0112-5

^1, , ^2, , ^3, , ^4, , ^5,

1.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

2.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

3.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

4.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

5.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

基金项目: the National High Technology Research and Development Program of China(2006AA11A189) the Science and Technol-ogy Commission of Shanghai Municipality, China(0952nm01400;07DZ12036)

Influence of rare earth promoters on the performance of Ni/Mg(Al)O catalysts for hydrogenation and steam reforming of toluene

ZHANG Yuwen ^1, , CHENG Hongwei ^2, , LU Xionggang ^3, , DING Weizhong ^4, , ZHOU Guozhi ^5,

1.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

2.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

3.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

4.Shanghai Key Laboratory of Modern Metallurgy and Materials Processing, School of Materials Science and Engineering, Shanghai University, Shanghai 200072,China

Keywords： hydrogen production

CeO_(2-), La_2O_(3-), and ZiO_2-promoted Ni/Mg(Al)O catalysts synthesized by hydrotalcite-type precursors have been investigated with respect to catalytic activity and carbon formation in the hydrogenation and steam reforming of toluene as a model tar compound. X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) specific surface area and H_2-temperature programmed reduction (TPR) were used to observe the characteristics of the prepared catalysts. The carbon formation and its amount on the used catalysts were examined by transmission election microscope (TEM), scanning electron microscope (SEM) and thermogravimetric (TG). The trend of catalytic activity as derived from the experimental results followed the order: Ni-Ce>Ni-La>Ni-Zr>Ni. The catalyst modified with CeO_2 exhibited the highest catalytic perform-ance and had good carbon resistance in the hydrogenation and steam reforming of toluene. A toluene conversion of 96.8%, a CH_4 yield of 45.2% and a CO yield of 50.4% have been achieved. The addition of promoters led to better dispersion of nickel species and higher interac-tion nickel-support, which were favorable for increasing the catalytic activity and effectively preventing carbon formation.

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Influence of rare earth promoters on the performance of Ni/Mg(Al)O catalysts for hydrogenation and steam reforming of toluene

参考文献