DOI: 10.1016/j.jcou.2016.10.015
Scopus记录号: 2-s2.0-84997170982
论文题名: CO production from CO2 via reverse water-gas shift reaction performed in a chemical looping mode: Kinetics on modified iron oxide
作者: Wenzel M. ; Aditya Dharanipragada N.V.R. ; Galvita V.V. ; Poelman H. ; Marin G.B. ; Rihko-Struckmann L. ; Sundmacher K.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 17 语种: 英语
英文关键词: Chemical looping
; CO production
; CO2 reduction
; Iron oxide
; Reverse water-gas shift
Scopus关键词: Carbon dioxide
; Carbon monoxide
; Cerium
; Chemical shift
; Gases
; Iron
; Iron oxides
; Kinetics
; Oxidation
; Reaction kinetics
; Sintering
; Thermogravimetric analysis
; Chemical looping
; Co-production
; Long term stability
; Oxidation and reduction
; Reactant concentrations
; Reaction mechanism
; Reverse water gas shift
; Reverse water-gas shift reaction
; Water gas shift
英文摘要: Carbon monoxide production from carbon dioxide via isothermal reverse water-gas shift chemical looping (RWGS-CL) is studied with a modified iron oxide oxygen carrier material (80wt% Fe2O3-Ce0.5Zr0.5O2). The material is characterized by TEM, XRD and thermogravimetry at temperatures from 750°C to 850°C and gas mole fractions of H2 and CO2 from 0.05 to 0.75, respectively. High temperature and high reactant concentrations favor the oxidation and reduction of the material during repeated redox cycles. The reaction rate of reduction is always faster than that of oxidation applying the same gas concentration of H2 and CO2, respectively. The long term stability of the material is investigated with 500 redox cycles in a plug flow reactor. The material shows gradual deactivation lowering the CO yield during the first 100 redox cycles. After that, a steady state CO yield is reached for the next 400 redox cycles. Deactivation is attributed to surface sintering which results in slower reaction kinetics. TG data was used for a kinetic analysis applying the master plot method. The experimental data for oxidation and reduction indicated reaction mechanisms, which are well described by a reaction order and a geometrical contraction model. After parameter estimation, a good agreement between the model and the TG data was achieved with the reaction order and geometrical contraction model for oxidation and reduction, respectively. The RWGS-CL process can be used for sustainable CO production from CO2 if the energy for the process and for H2 production is supplied by renewable sources. © 2016 Elsevier Ltd. 资助项目: College of Science, Technology, Engineering, and Mathematics, Youngstown State University
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52805
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Wenzel M.,Aditya Dharanipragada N.V.R.,Galvita V.V.,et al. CO production from CO2 via reverse water-gas shift reaction performed in a chemical looping mode: Kinetics on modified iron oxide[J]. Journal of CO2 Utilization,2017-01-01,17