Citation: YANG Shu-qian, ZHANG Na, HE Jian-ping, ZHANG Lei, WANG Hong-hao, BAI Jin, ZHANG Jian, LIU Dao-sheng, YANG Zhan-xu. Effect of impregnation sequence of Ce on the performance of Cu/Zn-Al catalysts derived from hydrotalcite precursor in methanol steam reforming[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(4): 479-488. shu

Effect of impregnation sequence of Ce on the performance of Cu/Zn-Al catalysts derived from hydrotalcite precursor in methanol steam reforming

1.
College of Chemistry, Chemical Engineering, and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China
2.
Department of Chemical Engineering, Fushun Vocational Technology Institute, Fushun 113122, China

Corresponding author: ZHANG Lei, lnpuzhanglei@163.com BAI Jin, baijin_fy@163.com
Received Date: 30 October 2017
Revised Date: 13 December 2017

Fund Project: the Science Research General Foundation of Liaoning Education Department L2015296the Doctoral Scientific Research Foundation of Liaoning Provinve 201601322The project was supported by the National Natural Science Foundation of China (21376237), the Doctoral Scientific Research Foundation of Liaoning Provinve (201601322), the Science Research General Foundation of Liaoning Education Department(L2015296) and Research Fund Project for the Construction of Instrument and Equipment Sharing Service Platform of Liaoningthe National Natural Science Foundation of China 21376237

Figures(11)

ZnAl-LDHs was prepared by in-situ synthesis method on γ-Al₂O₃ and the Cu/Zn-Al, Ce/Cu/Zn-Al, Cu/Ce/Zn-Al and Cu-Ce/Zn-Al catalysts were then obtained by wet impregnation method for methanol steam reforming. The catalysts were characterized by XRD, XRF, SEM, N₂ sorption, XPS, H₂-TPR and N₂O titration; the effect of impregnation sequence of Ce on the performance of the Cu/Zn-Al catalysts in methanol steam reforming to produce hydrogen was investigated. The results showed that the impregnation sequence of Ce has a significant influence on the reducibility of resultant catalyst, which subsequently affects the catalytic performance. The Ce/Cu/Zn-Al catalyst exhibits the highest activity; over it, the methanol conversion reaches 100% under 250℃ and with a water/methanol molar ratio of 1.2 and gas hourly space velocity of 800 h^-1, which is almost 40% higher than that achieved on the Cu/Zn-Al catalyst.
- impregnation sequence,
- hydrotalcite,
- ceria,
- methanol steam reforming,
- hydrogen
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