Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C2+OH

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (1): 107-113.

Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH

Zhenghong Bao^a, Kang Xiao^a,b, Xingzhen Qi^a, Xinxing Wang^a, Liangshu Zhong^a* Kegong Fang^c, Minggui Lin^c, Yuhan Sun^a,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

收稿日期:2012-11-22 修回日期:2013-01-10 出版日期:2013-01-20 发布日期:2013-02-06
通讯作者: Liangshu Zhong

Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH

Zhenghong Bao^a, Kang Xiao^a,b, Xingzhen Qi^a, Xinxing Wang^a, Liangshu Zhong^a* Kegong Fang^c, Minggui Lin^c, Yuhan Sun^a,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

Received:2012-11-22 Revised:2013-01-10 Online:2013-01-20 Published:2013-02-06
Contact: Liangshu

摘要/Abstract

摘要： 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.

关键词: higher alcohol synthesis, syngas, Cu-Fe composite oxides, molar ratio, GHSV

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.

Key words: higher alcohol synthesis, syngas, Cu-Fe composite oxides, molar ratio, GHSV

Zhenghong Bao, Kang Xiao, Xingzhen Qi, Xinxing Wang, Liangshu Zhong* Kegong Fang. Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH[J]. 能源化学(英文), 2013, 22(1): 107-113.

Zhenghong Bao, Kang Xiao, Xingzhen Qi, Xinxing Wang, Liangshu Zhong* Kegong Fang, Minggui Lin, Yuhan Sun*. Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH[J]. Journal of Energy Chemistry, 2013, 22(1): 107-113.

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Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH

Higher alcohol synthesis over Cu-Fe composite oxides with high selectivity to C₂₊OH

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