DOI: 10.1016/j.jcou.2013.07.008
Scopus记录号: 2-s2.0-84889086923
论文题名: Photocatalytic reduction of CO2 under supercritical CO 2 conditions: Effect of pressure, temperature, and solvent on catalytic efficiency
作者: Kawanami H. ; Grills D.C. ; Ishizaka T. ; Chatterjee M. ; Suzuki A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2013
卷: 2017-03-04 起始页码: 93
结束页码: 97
语种: 英语
英文关键词: Photocatalytic CO2 reduction
; Rhenium catalyst
; Supercritical CO2
; Turnover frequency
; Turnover number
Scopus关键词: Incident light intensity
; Low-pressure conditions
; Photo-catalytic
; Photocatalytic reduction of co
; Sacrificial electron donors
; Supercritical CO
; Turnover frequency
; Turnover number
; Catalysts
; Organic solvents
; Carbon dioxide
英文摘要: The photocatalytic reduction of CO2 to CO in single-phase, high-pressure mixtures of supercritical CO2 and N,N-dimethylformamide (DMF), using fac-ReCl(bpy)(CO)3 as a catalyst in the presence of triethanolamine as a sacrificial electron donor has been investigated. The catalytic efficiency was found to be strongly influenced by both the CO 2 and DMF concentrations. For example, the turnover number (TON) for CO formation increases linearly with CO2 pressure up to 60 at 17.8 MPa/60 C. It also increases dramatically as the [DMF] is increased from 3.8 to 6.3 M, and then remains almost constant with further increases in [DMF]. This resulted in an optimized TON of 62 at 17.8 MPa CO2/60 C and [DMF] = 6.3 M, and an initial turnover frequency (TOF) of ∼56 h-1 at 17.8 MPa CO2/60 C and [DMF] = 11.4 M. These values are 5× and 2.3× higher, respectively than those obtained under biphasic low-pressure conditions (0.1 MPa CO2), demonstrating that significant improvements in catalytic performance are possible through the use of high concentrations of CO2. Manipulation of the incident light intensity led to further improvements in both TON (up to 72 under low light levels) and TOF (up to 117 h-1 under the highest light level investigated). © 2012 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/53034
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Kawanami H.,Grills D.C.,Ishizaka T.,et al. Photocatalytic reduction of CO2 under supercritical CO 2 conditions: Effect of pressure, temperature, and solvent on catalytic efficiency[J]. Journal of CO2 Utilization,2013-01-01,2017-03-04