DOI: 10.1016/j.jcou.2018.01.008
Scopus记录号: 2-s2.0-85041484591
论文题名: An in-situ IR study on the adsorption of CO2 and H2O on hydrotalcites
作者: Coenen K. ; Gallucci F. ; Mezari B. ; Hensen E. ; van Sint Annaland M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 24 起始页码: 228
结束页码: 239
语种: 英语
英文关键词: Bidentate carbonate
; CO2 Capture
; Hydrotalcite
; In-situ IR
Scopus关键词: Adsorption
; Carbon dioxide
; Carbonates
; Carbonation
; Sorption
; Temperature
; Thermogravimetric analysis
; Water gas shift
; Adsorption capacities
; Bidentate carbonates
; CO2 capture
; Hydrotalcites
; In-situ IR
; Operating temperature
; Reversible adsorption
; Sorption enhanced water gas shift
; Indium compounds
英文摘要: In-situ IR technique was used to study the reversible adsorption of CO2 and H2O at elevated temperatures on a potassium-promoted hydrotalcite for its use in sorption-enhanced water-gas shift (SEWGS). It was found that mainly bidentate carbonate species are responsible for the reversible (cyclic) adsorption capacity of the sorbent. The presence of H2O can enhance the decomposition of bidentate carbonates bond to the stronger basic surface-sites. The basic strength of the involved adsorption sites for bidentate formation appears to be highly heterogeneous. At higher operating temperatures, reversible formation of bulk carbonates seem to participate in the reversible adsorption for CO2. The presence of H2O on the sorbent can lead to the formation of bi-carbonate, especially at lower operating temperatures of 300 °C. The transient absorbance of the main absorption bands for carbonate species identified during this study can be used in the development of a detailed description of the reversible adsorption/desorption kinetics reported before using thermogravimetric analyses. © 2018 The Authors Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111982
Appears in Collections: 气候减缓与适应
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作者单位: Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, Eindhoven, Netherlands
Recommended Citation:
Coenen K.,Gallucci F.,Mezari B.,et al. An in-situ IR study on the adsorption of CO2 and H2O on hydrotalcites[J]. Journal of CO2 Utilization,2018-01-01,24