PENG Nannan, LI Ning*, DNEG Minghai, WEI Lining, JIANG Wu

(College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China)

Abstract: NiCoPrLa hydrotalcites were synthesized by microwave, microwave-hydrothermal and hydrothermal treatment. In order to study the crystalline phase and thermal stability of the hydrotalcite-like compounds and the crystalline phase、reducibility、adsorptive property and carbon deposition resisting property of the derived mixed oxides, the obtained samples were characterized by XRD, TG, TPO, TPR, TPD and FT-IR. At the meantime, the ethanol steam reforming was taken as the proble reaction to investigate the initial activity and the selectivity of mixed oxides derived from NiCoPrLa hydrotalcite-like compounds prepared by different methods. The results showed that the structure and thermal stability of the hydrotalcite were influenced by preparation methods. The hydrothermal method could synthesis hydrotalcite with good crystallinity, microwave-hydrothermal method could improve the thermal stability of the hydrotalcite-like compounds，the catalyst synthesized by microwave-hydrothermal method had a better catalytic performance and carbon deposition resisting property，and the ethanol conversion of the catalyst achieved 86% at 350℃.

Key words: preparation methods; hydrotalcite-like compound; derived mixed oxides

E-mail: lining5891539@163.com 

Journal of Molecular Catalysis, Vol. 26, Issue 5, 2012, 414-422