Volume 8, Issue 6 2000083
Full Paper

Catalytic Toluene Reforming with In Situ CO2 Capture via an Iron–Calcium Hybrid Absorbent for Promoted Hydrogen Production

Long Han

Corresponding Author

Long Han

Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Chaowang Rd. 18, Hangzhou, 310014 China

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Qi Liu

Qi Liu

Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Chaowang Rd. 18, Hangzhou, 310014 China

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Yuan Zhang

Yuan Zhang

Department of Environmental Impact Assessment, Hangzhou Branch of Zhejiang Environment Technology Co., LTD, Xiangwang Rd. 199, Hangzhou, 311100 China

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Qinhui Wang

Corresponding Author

Qinhui Wang

State Key Laboratory of Clean Energy Utilisation, Institute for Thermal Power Engineering, Zhejiang University, Zheda Rd. 38, Hangzhou, 310027 China

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Nai Rong

Corresponding Author

Nai Rong

Department of Building Environment and Thermal Engineering, School of Environment and Energy Engineering, Anhui Jianzhu University, Ziyun Rd. 292, Hefei, 230601 China

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Xiaorui Liang

Xiaorui Liang

State Key Laboratory of Clean Energy Utilisation, Institute for Thermal Power Engineering, Zhejiang University, Zheda Rd. 38, Hangzhou, 310027 China

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Yi Feng

Yi Feng

State Key Laboratory of Clean Energy Utilisation, Institute for Thermal Power Engineering, Zhejiang University, Zheda Rd. 38, Hangzhou, 310027 China

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Kaili Ma

Kaili Ma

Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Chaowang Rd. 18, Hangzhou, 310014 China

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Mi Yan

Mi Yan

Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Chaowang Rd. 18, Hangzhou, 310014 China

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Yanjun Hu

Yanjun Hu

Institute of Energy and Power Engineering, College of Mechanical Engineering, Zhejiang University of Technology, Chaowang Rd. 18, Hangzhou, 310014 China

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First published: 04 April 2020
Citations: 13

Abstract

A two-step sol–gel method is adopted to prepare an iron–calcium hybrid absorbent (Ca–Al–Fe) integrating iron catalysis component and inert support with CaO for calcium looping gasification. Effects of Ca–Al–Fe on cyclic CO2 capture reactivity, mechanical strength, and enhanced reforming of biomass tar model component (toluene) are investigated by comparing with three reference absorbents. Results show that main components of Ca–Al–Fe are CaO, mayenite (Ca12Al14O33), and brownmillerite (Ca2Fe2O5). Ca12Al14O33 plays key roles in keeping stable cyclic carbonation reactivity and significantly promotes mechanical strength of the novel absorbent. In comparison with other absorbents without coupling Ca12Al14O33 or Ca2Fe2O5, Ca–Al–Fe approaches the highest toluene conversion (around 60%) and has the lowest coke deposition (12.2 mg g−1), due to the synergetic influences of Ca2Fe2O5 and Ca12Al14O33, which significantly promotes hydrogen production while reducing CO2 yield in reforming syngas. In addition, influences of reaction conditions such as iron loading, reaction temperature, molar ratio of H2O to carbon in toluene, and absorbent particle size on toluene reforming are examined in the presence of Ca–Al–Fe. Potential reaction routes of toluene reforming are also analyzed and discussed.

Conflict of Interest

The authors declare no conflict of interest.

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