DOI: 10.1016/j.jcou.2017.12.002
Scopus记录号: 2-s2.0-85037522351
论文题名: Study of LaxNiOy and LaxNiOy/MgAl2O4 catalysts in dry reforming of methane
作者: Messaoudi H. ; Thomas S. ; Djaidja A. ; Slyemi S. ; Barama A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 24 起始页码: 40
结束页码: 49
语种: 英语
英文关键词: Dry reforming
; Kinetic modelling
; Lanthanum
; Nickel
; Perovskite
; Spinel
Scopus关键词: Aluminum compounds
; Carbon
; Carbon dioxide
; Catalyst activity
; Catalysts
; Catalytic reforming
; Chemical shift
; Dispersions
; Kinetic theory
; Lanthanum
; Lanthanum compounds
; Magnesium compounds
; Methane
; Nickel
; Nickel compounds
; Perovskite
; Produced Water
; Sol-gels
; Steam reforming
; Water gas shift
; Dry reforming
; Dry reforming-of-methane
; H2 chemisorption
; Impregnation methods
; Kinetic modelling
; Reaction mechanism
; Reverse water-gas shift reaction
; Spinel
; Catalyst supports
英文摘要: Bulk LaxNiOy and supported LaxNiOy/MgAl2O4 (with x = 1 or 2 and y = 3 or 4) catalysts have been prepared respectively by sol-gel and impregnation methods The elaborated materials have been characterized by XRD, BET, H2-TPR, H2-chemisorption and TPO. The catalytic activity was evaluated in dry reforming of methane (DMR) with an equimolar ratio of CH4 and CO2. XRD analysis shows the presence of LaNiO3 La2NiO4 and MgAl2O4 phases. Higher specific surface areas and nickel dispersions were obtained for the supported catalysts. H2-TPR analysis revealed a low reducibility of the nickel in the supported solids. Supported catalysts were found more active and stable than bulk one in DMR in good agreement with higher Ni dispersion and the beneficial role of the basic support. The XRD analysis performed on the spent catalysts (after 65 h of catalytic test) revealed the presence of the initial phases with metallic nickel species. The TPO analysis showed a low carbon deposition for the supported catalysts. A kinetic study based on the reaction mechanism points out the participation of the reverse water gas shift reaction (RWGS) for the conversion of CO2 and of the produced H2 as well as contribution of steam methane reforming reaction for the conversion of CH4, with water produced from (RWGS), for temperatures over 1023 K. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111980
Appears in Collections: 气候减缓与适应
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作者单位: Laboratoire des Matériaux Catalytiques et Catalyse en Chimie Organique, Faculté de Chimie, USTHB, BP 32 El Alia, 16111Bab Ezzouar, Alger, Algeria; Institut de Chimie et Procédés pour l’Énergie, l'Environnement et la Santé, UMR 7515 CNRS-Université de Strasbourg, Groupe “Énergies et Carburants pour un Environnement durable”, 25 rue Becquerel, 67087 Strasbourg Cedex 2, France; Laboratoire des Procédés pour Matériaux, Energie, Eau et Environnement, Faculté des Sciences et des Sciences Appliquées, Université de Bouira, rue Drissi YahiaBouira 10000, Algeria
Recommended Citation:
Messaoudi H.,Thomas S.,Djaidja A.,et al. Study of LaxNiOy and LaxNiOy/MgAl2O4 catalysts in dry reforming of methane[J]. Journal of CO2 Utilization,2018-01-01,24