DOI: 10.1016/j.jcou.2017.06.015
Scopus记录号: 2-s2.0-85021407294
论文题名: Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts
作者: Ayodele O.B.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 20 起始页码: 368
结束页码: 377
语种: 英语
英文关键词: CO2 hydrogenation
; Cu/ZnO nanocatalysts
; Methanol synthesis
; Methyl formate
Scopus关键词: Byproducts
; Carbon
; Carbon dioxide
; Carbon monoxide
; Catalysts
; Chemical shift
; Fuels
; Hydrogenation
; Methanol
; Scanning electron microscopy
; Synthesis gas manufacture
; High-resolution scanning electron microscopies
; Methanol synthesis
; Methyl formate
; Nanocatalysts
; Production mechanisms
; Reverse water-gas shift reaction
; Solid acid catalysts
; Specialty chemicals
; Water gas shift
英文摘要: This study reports the synthesis of Cu/ZnO supported on Al2O3, SiO2, ZrO2 and solid acid catalyst ZSM-5 for the hydrogenation of CO2 to methanol (MeOH). The activity of all the supported catalysts except Cu/ZnO supported on ZSM-5 (CZZSM) tested at 250 °C and 2.25 MPa for 13 h time-on-stream (TOS) showed carbon monoxide as byproduct due to the nefarious reverse water gas shift reaction (RWGS) that typically compete with MeOH production during CO2 hydrogenation. Methyl formate and dimethyl ether which are value added specialty chemicals were the byproducts when CZZSM was tested and their production mechanism was ascribed to the acidity of the ZSM-5 support. According to the NH3-TPD and CO2-TPD studies, CZZSM has considerable acidity of 15.02 μmol/m2 which is about 20 folds higher than the 0.74 μmol/m2 measured for the basic sites. Furthermore, the extreme high resolution scanning electron microscopy (XHR-SEM) and BET results showed that the ZSM-5 framework, structural and textural properties were retained after the synthesis of CZZSM which showed that the synthesis protocol was expedient. Thus, the effect of the solid acid catalyst was easily evaluated. In addition, the XHR-SEM, TEM and XRD results showed that the Co-oxide particles were highly dispersed nano-particle with average size of 2.4 nm. The CZZSM achieved and impressive CO2 conversion of 20.25% with average space-time yield of 60 and 16 gproduct gcat -1 min-1, and selectivity of 77.70% and 10.0% for MeOH and MeF, respectively which are promising for industrial application. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52706
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Ayodele O.B.. Eliminating reverse water gas shift reaction in CO2 hydrogenation to primary oxygenates over MFI-type zeolite supported Cu/ZnO nanocatalysts[J]. Journal of CO2 Utilization,2017-01-01,20