CO<sub>2</sub> conversion by thermal plasma with carbon as reducing agent: high CO yield and energy efficiency

Peng LIU (刘朋); Xuesong LIU (刘雪松); Jun SHEN (沈俊); Yongxiang YIN (印永祥); Tao YANG (杨涛); Qiang HUANG (黄强); Daniel AUERBACH; Aart W KLEIYN

doi:10.1088/2058-6272/aadf30

Plasma Science and Technology > 2019 > 21(1): 12001-012001. > DOI: 10.1088/2058-6272/aadf30

Peng LIU (刘朋), Xuesong LIU (刘雪松), Jun SHEN (沈俊), Yongxiang YIN (印永祥), Tao YANG (杨涛), Qiang HUANG (黄强), Daniel AUERBACH, Aart W KLEIYN. CO₂ conversion by thermal plasma with carbon as reducing agent: high CO yield and energy efficiency[J]. Plasma Science and Technology, 2019, 21(1): 12001-012001. DOI: 10.1088/2058-6272/aadf30

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CO₂ conversion by thermal plasma with carbon as reducing agent: high CO yield and energy efficiency

¹ School of Chemical Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
² Center of Interface Dynamics for Sustainability, Institute of Materials, China Academy of Engineering Physics, Chengdu 610200, People’s Republic of China

Funds: The authors wish to acknowledge the supports of National Natural Science Foundation of China (Nos. 11775155, 51561135013, 21603202).

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Received Date: July 03, 2018

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Abstract

Abstract

A key problem in CO₂ conversion by thermal plasma is suppressing the inverse reactions, CO+O→CO₂and CO+0.5O₂ →CO₂, to simultaneously obtain high CO yield and energy efficiency. This can be done by quickly quenching the decomposed gas or rapidly taking away free oxygen from decomposed gas. In this paper, experiments of CO₂ conversion by thermal plasma with carbon as a reducing agent are presented. Carbon quickly devoured free oxygen in thermal plasma decomposed gas, and not only is the inverse reaction completely suppressed, but the discharge energy to form oxygen atoms, oxygen molecular, and thermal energy is also reused. A CO₂ conversion rate of 67%–94% and the corresponding electric energy efficiency of about 70% are achieved, both are much higher than that seen so far by other plasma implementations.
- thermal plasma,
- CO₂ conversion,
- CO₂ utilization

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References (21)

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