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CLC number: X701

On-line Access: 2018-01-12

Received: 2017-01-31

Revision Accepted: 2017-06-26

Crosschecked: 2017-12-15

Cited: 1

Clicked: 1621

Citations:  Bibtex RefMan EndNote GB/T7714

 ORCID:

Takashi Sagawa

https://orcid.org/0000-0002-0908-0487

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Journal of Zhejiang University SCIENCE A 2018 Vol.19 No.1 P.80-85

http://doi.org/10.1631/jzus.A1700056


Conversion of CO2 to useful substances with composite iron, nickel, and copper catalysts


Author(s):  Takashi Sagawa

Affiliation(s):  Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, Japan

Corresponding email(s):   sagawa@energy.kyoto-u.ac.jp

Key Words:  Iron catalyst, CO2 reduction, Water-gas shift reaction, Methanol synthesis


Takashi Sagawa. Conversion of CO2 to useful substances with composite iron, nickel, and copper catalysts[J]. Journal of Zhejiang University Science A, 2018, 19(1): 80-85.

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journal="Journal of Zhejiang University Science A",
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%T Conversion of CO2 to useful substances with composite iron, nickel, and copper catalysts
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T1 - Conversion of CO2 to useful substances with composite iron, nickel, and copper catalysts
A1 - Takashi Sagawa
J0 - Journal of Zhejiang University Science A
VL - 19
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SP - 80
EP - 85
%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1700056


Abstract: 
Composite materials of Fe/Al2O3, which consist of small particles of iron supported by thermally stable alumina even at 500–700 °C, have been widely used in the water-gas shift reaction for natural gas reforming. Therefore, Fe/Al2O3 is one of the promising candidates for re-transformation of exhausted CO2 into fuels such as alcohols and hydrocarbons. The development of a CO2 reforming system using the composite materials of Fe/Al2O3 through CO2 reduction to CO, dissociation of water into hydrogen, and methanol synthesis has been investigated. It was found that dry and steam (i.e. wet) reforming of CO2 produced almost the same amount of CO. At a temperature above 500 °C, maximal and saturated yields of CO and H2 from CO2 and water were obtained. However, this CO2 reforming system requires higher-pressure conditions from several tens to hundreds standard atmospheric pressure in order to achieve high yield and selectivity for methanol production. In this study we developed the modified CO2 reforming system by the utilization of Ni and/or Cu instead of Fe in order to obtain other types of useful products such as CO, CH4, and carbon, more efficiently and selectively under atmospheric pressure. When Ni or Cu was used, conversion of CO2 was reduced to 76%, while 9% of methane was detected in the case of Ni. On the other hand, though the CO2 conversion reduced half of the Fe, the selectivity of CO from CO2 increased to 95% in the case of Cu.

复合铁、镍、铜催化剂用于二氧化碳的资源化

目的:1. 对现有的CO2重整系统中铁系催化剂进行改进以期获得更高的产率和产物选择性;2. 实现反应体系中催化剂的高效回收以延长反应体系的可持续性.
创新点:1. 开发复合铁、镍、铜催化剂用于水煤气变换反应,获得了更高的产物选择性;2. 提高了CO2重整体系在常压条件下液态烃类的产率.
方法:1. 由核心沉淀法制得复合铁/氧化铝催化剂;2. 在固定床反应器中进行CO2重整反应.
结论:1. 干、湿条件下的CO2重整过程产生相同数量的CO;当温度高于500 °C时,CO的产率达到饱和.2. 采用镍作为铁催化剂助剂时,CO的选择性从85%降低到76%,但是产物中可检出9%的甲烷.3. 采用铜作为铁催化剂助剂时,尽管CO2的转化率降低了一半,然而CO的选择性提高到了95%.

关键词:铁催化剂;二氧化碳减排;水煤气变换;甲醇合成

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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