DOI: 10.1016/j.jcou.2018.02.011
Scopus记录号: 2-s2.0-85042472028
论文题名: Pinpointing energy losses in CO2 plasmas – Effect on CO2 conversion
作者: Berthelot A. ; Bogaerts A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 24 起始页码: 479
结束页码: 499
语种: 英语
英文关键词: CO2 conversion
; Energy efficiency
; Non-equilibrium plasmas
; Reduced electric field
; Vibrational excitation
Scopus关键词: Activation energy
; Carbon dioxide
; Electric excitation
; Electric fields
; Energy dissipation
; Energy transfer
; Ionization of gases
; Chemical kinetics model
; Empirical formulas
; Ionization degree
; Low gas temperature
; Nonequilibrium plasmas
; Vibrational energies
; Vibrational excitation
; Vibrational kinetics
; Energy efficiency
英文摘要: Plasma technology is gaining increasing interest for CO2 conversion, but to maximize the energy efficiency, it is important to track the different energy transfers taking place in the plasma. In this paper, we study these mechanisms by a 0D chemical kinetics model, including the vibrational kinetics, for different conditions of reduced electric field, gas temperature and ionization degree, at a pressure of 100 mbar. Our model predicts a maximum conversion and energy efficiency of 32% and 47%, respectively, at conditions that are particularly beneficial for energy efficient CO2 conversion, i.e. a low reduced electric field (10 Td) and a low gas temperature (300 K). We study the effect of the efficiency by which the vibrational energy is used to dissociate CO2, as well as of the activation energy of the reaction CO2 + O → CO + O2, to elucidate the theoretical limitations to the energy efficiency. Our model reveals that these parameters are mainly responsible for the limitations in the energy efficiency. By varying these parameters, we can reach a maximum conversion and energy efficiency of 86%. Finally, we derive an empirical formula to estimate the maximum possible energy efficiency that can be reached under the assumptions of the model. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111981
Appears in Collections: 气候减缓与适应
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作者单位: Department of Chemistry, Research group PLASMANT, University of Antwerp, Universiteitsplein 1, Antwerp, 2610, Belgium
Recommended Citation:
Berthelot A.,Bogaerts A.. Pinpointing energy losses in CO2 plasmas – Effect on CO2 conversion[J]. Journal of CO2 Utilization,2018-01-01,24