DOI: 10.1016/j.jcou.2015.04.003
Scopus记录号: 2-s2.0-84952304277
论文题名: Modifying alumina with CaO or MgO in supported Ni and Ni-Co catalysts and its effect on dry reforming of CH4
作者: Sengupta S. ; Deo G.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2015
卷: 10 起始页码: 67
结束页码: 77
语种: 英语
英文关键词: Basic promoters
; Carbon deposition
; CH4
; CO2
; Ni-Co/Al2O3
; Reforming
Scopus关键词: Alumina
; Aluminum
; Carbon
; Carbon dioxide
; Catalyst activity
; Catalysts
; Catalytic reforming
; Magnesia
; Nickel
; Reforming reactions
; Basic promoters
; Carbon deposition
; CH<sub>4</sub>
; Characterization studies
; Improved activities
; Metal crystallites
; Strong interaction
; Synthesis conditions
; Catalyst supports
英文摘要: Modifying the support of the alumina (Al2O3) supported Ni and Ni-Co catalysts with limited amounts of CaO and MgO had an effect on the catalytic activity during the reforming of CH4 with CO2 at 873 K. The presence of CaO had a favorable effect on the catalytic activity of the supported catalysts. In contrast, the presence of MgO had an adverse effect due to the strong interaction of MgO with the Ni and Co phases under the present synthesis conditions. Characterization of the supported Ni and Ni-Co catalysts revealed that modifying the support with CaO or MgO had an effect on the reducibility, amount and type of H2 and CO2 chemisorbed and the nature of the metal crystallite. The characterization studies also revealed that the limited interaction of CaO with Ni phase in supported Ni and Ni-Co catalysts gave rise to additional sites that were able to chemisorb H2 and CO2 at higher temperatures without having a significant effect on the reducibility of the catalysts. The presence of these additional sites may be the reason for the improved activity of the modified-Al2O3 supported Ni and Ni-Co catalysts containing CaO. © 2015 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/52986
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Sengupta S.,Deo G.. Modifying alumina with CaO or MgO in supported Ni and Ni-Co catalysts and its effect on dry reforming of CH4[J]. Journal of CO2 Utilization,2015-01-01,10