Journal of Energy Chemistry
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Journal of Energy Chemistry 2013, Vol. 22 Issue (1) :107-113    DOI:
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Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C2+OH

Zhenghong Baoa, Kang Xiaoa,b, Xingzhen Qia, Xinxing Wanga, Liangshu Zhonga* Kegong Fangc, Minggui Linc, Yuhan Suna,c*

a. Low-Carbon Conversion Center, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China; b. University of Chinese

Academy of Sciences, Beijing 100049, China; c. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences,

Taiyuan 030001, Shanxi, China


Abstract

 Cu-Fe composite oxides were prepared by co-precipitation method and tested for higher alcohol synthesis from syngas. The selectivity to C2+OH and C6+OH in alcohol distribution was very high while the methane product fraction in hydrocarbon distribution was rather low, demonstrating a promising potential in higher alcohols synthesis from syngas. The distribution of alcohols and hydrocarbons approximately obeyed Anderson-Schulz-Flory distribution with similar chain growth probability, indicating alcohols and hydrocarbons derived from the same intermediates. The effects of Cu/Fe molar ratio, reaction temperature and gas hourly space velocity (GHSV) on catalytic performance were studied in detail. The sample with a Cu/Fe molar ratio of 10/1 exhibited the best catalytic performance. Higher reaction temperature accelerated water-gas-shift reaction and led to lower total alcohols selectivity. GHSV showed great effect on catalytic performance and higher GHSV increased the total alcohol selectivity, indicating there existed visible dehydration reaction of alcohol into hydrocarbon.
Keywords: higher alcohol synthesis syngas Cu-Fe composite oxides molar ratio GHSV   
Received: 2012-11-22; published: 2013-02-06
Corresponding Authors: Liangshu  Email: zhongls@sari.ac.cn
Cite this article:   
Zhenghong Bao, Kang Xiao, Xingzhen Qi etc .Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C2+OH[J]  Journal of Energy Chemistry, 2013,V22(1): 107-113
URL:  
http://www.jenergchem.org/EN/     或     http://www.jenergchem.org/EN/Y2013/V22/I1/107
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