DOI: 10.1016/j.jcou.2017.07.020
Scopus记录号: 2-s2.0-85026828092
论文题名: The effect of the compensating cation on the catalytic performances of Ni/USY zeolites towards CO2 methanation
作者: Bacariza M.C. ; Bértolo R. ; Graça I. ; Lopes J.M. ; Henriques C.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 21 起始页码: 280
结束页码: 291
语种: 英语
英文关键词: CO2 methanation
; Compensating cations
; FTIR operando
; Nickel
; Zeolites
Scopus关键词: Calcium
; Carbon dioxide
; Catalysts
; Cesium
; Hydrogenation
; Ion exchange
; Lithium
; Methanation
; Nickel
; Particle size
; Positive ions
; Zeolites
; Catalyst properties
; Catalytic performance
; CO2 adsorption
; Compensating cations
; Divalent cation
; Monovalent cations
; Operando
; Textural properties
; Cesium compounds
英文摘要: In the present work, monovalent (Cs+, K+, Na+, Li+) and divalent (Ba2+, Ca2+, Mg2+) cations have been exchanged in a HUSY zeolite and impregnated with 15% of Ni, in order to be used as catalysts for CO2 methanation reaction. The results showed that the order of improvement of the catalytic performances is Cs+ > Na+ > Li+ > K+ > H+ for the monovalent cations and Mg2+ > Ca2+ > Ba2+ for the divalent. No important differences were observed in terms of Ni reducibility followed by H2-TPR and textural properties determined by N2 adsorption experiments. In addition, similar Ni particles sizes were observed for Cs+, Na+, Li+ and H+ and much bigger Ni particles were found on K+ sample. The differences in the performances of these monovalent exchanged samples were thus attributed to the reported enhancement of the CO2 adsorption capacity and framework basicity of the zeolites containing these cations. In terms of divalent cations, Mg2+ sample presented both the lower Ni particle size and the better performances, while no relevant differences were observed in terms of Ni species reducibility and textural properties among all the divalent samples. Thus, Mg2+ induces not only an enhancement of the CO2 activation, but also of the Ni dispersion. To conclude, this work constitutes a crucial advance in the use of zeolites as supports for CO2 conversion into CH4 by tuning the catalyst properties through the exchanged cation, as almost no studies on this subject have been published. © 2017 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52639
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Bacariza M.C.,Bértolo R.,Graça I.,et al. The effect of the compensating cation on the catalytic performances of Ni/USY zeolites towards CO2 methanation[J]. Journal of CO2 Utilization,2017-01-01,21