DOI: 10.1016/j.jcou.2018.05.013
Scopus记录号: 2-s2.0-85047008545
论文题名: DBD plasma-assisted CO2 methanation using zeolite-based catalysts: Structure composition-reactivity approach and effect of Ce as promoter
作者: Bacariza M.C. ; Biset-Peiró M. ; Graça I. ; Guilera J. ; Morante J. ; Lopes J.M. ; Andreu T. ; Henriques C.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 202
结束页码: 211
语种: 英语
英文关键词: CO2 methanation
; Nickel-cerium
; Plasma catalysis
; Structure-reactivity
; Zeolites
Scopus关键词: Atmospheric pressure
; Atmospheric structure
; Carbon dioxide
; Catalysis
; Catalysts
; Cerium
; Cerium compounds
; Dielectric materials
; Dielectric properties
; Hydrogenation
; Methanation
; Plasma theory
; Zeolites
; CO2 activation
; Plasma assisted catalysis
; Plasma catalysis
; Plasma conditions
; Power supply
; Structure reactivity
; Structure-reactivity relationships
; Zeolite catalyst
; Nickel compounds
英文摘要: In the present work the effects of the structure composition in terms of Si/Al ratio and Ce addition in the performances of Ni-based zeolites for CO2 methanation under DBD plasma-assisted catalysis were evaluated. Results were compared with the obtained for a commercial Ni/γ-Al2O3 catalyst and all samples were tested both under thermal and non-thermal DBD plasma conditions. It was found that a higher Si/Al ratio led to better performances not only under thermal but, especially, under plasma conditions, which was attributed to the lower affinity of this sample to water and, thus, to a decrease in the inhibitory role of this compound in Sabatier reaction. Furthermore, the addition of Ce as promoter favoured the dielectric properties of the materials and gave additional sites for CO2 activation leading to much better results than the obtained for a commercial Ni/γ-Al2O3 sample and for the Ni/zeolite, especially under plasma conditions. Indeed, the best zeolite of this work (NiCe/Zeolite) reported a CH4 yield of 75% with a power supply of 25 W while, under the same conditions, the commercial sample and the un-promoted Ni/Zeolite presented just 23% and 15%, CH4 yield, respectively. To our knowledge, this is the first time that a structure-reactivity relationship is attempted with zeolite catalysts under DBD plasma-assisted methanation conditions at atmospheric pressure. These facts also indicate that an important route is being opened, allowing answering to the essential question "what are the important characteristics a catalyst must have to show a better performance under plasma-assisted catalysis?". © 2018 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/111854
Appears in Collections: 气候减缓与适应
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作者单位: CQE-Centro de Química Estrutural, IST-InstitutoSuperior Técnico, Universidade de Lisboa, Av. Rovisco Pais, Lisboa, 1049-001, Portugal; IREC, Catalonia Institute for Energy Research, Sant Adrià de Besós, Jardins de les Dones de Negre 1, Barcelona, 08930, Spain; Department of Chemical Engineering, Imperial College London, London, SW7 2AZ, United Kingdom
Recommended Citation:
Bacariza M.C.,Biset-Peiró M.,Graça I.,et al. DBD plasma-assisted CO2 methanation using zeolite-based catalysts: Structure composition-reactivity approach and effect of Ce as promoter[J]. Journal of CO2 Utilization,2018-01-01,26