DOI: 10.1016/j.jcou.2018.06.013
Scopus记录号: 2-s2.0-85049099266
论文题名: Substrate dependence on the fixation of CO2 to cyclic carbonates over reusable porous hybrid solids
作者: Kolle J.M. ; Sayari A.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 564
结束页码: 574
语种: 英语
英文关键词: CO2 utilization
; Cyclic carbonates
; Porous hybrid solid catalyst
Scopus关键词: Carbon dioxide
; Carbonates
; Mesoporous materials
; Reusability
; Silica
; Silica gel
; Styrene
; Cyclic carbonates
; Hybrid solids
; Mesoporous Silica
; Reusable catalysts
; Solvent free synthesis
; Styrene carbonates
; Substrate dependences
; Textural properties
; Catalyst activity
英文摘要: N,N,N-tributyl-N-propylammonium iodide-functionalized mesoporous silicas (SBA-15 and a silica gel) proved to be efficient, robust and reusable catalysts for the solvent-free synthesis of cyclic carbonates (CCs) from epoxides and CO2. The reusability of the catalysts was found to be dependent on the nature of the support and the substrate. In the presence of 1,2-epoxybutane (1,2-EB) as substrate, the SBA-15-based catalyst (PHS-1) exhibited a constant catalytic activity for five reaction cycles (yield > 96.0%) under mild conditions (1.0 MPa CO2, 100 °C and 4 h). Conversely, in the presence of styrene oxide, a gradual decrease in yield was observed. Based on textural properties and 13C CP-MAS NMR measurements, such decline was attributed to the adsorption of solid reaction product (styrene carbonate - SC) on the catalyst surface. Using a chromatographic silica gel as support and an improved catalyst recovery step gave rise to a highly efficient, robust and fully reusable catalyst (PHS-2) for the synthesis of CCs. Notably, PHS-2 led to a 33-50% decrease in reaction time, and maintained an excellent and steady catalytic activity over 5 cycles in the synthesis of SC (yield > 96% and selectivity > 97%). The amount of trapped solid SC product on PHS-2 surface was also significantly reduced. © 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/111873
Appears in Collections: 气候减缓与适应
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作者单位: Centre for Catalysis Research and Innovation (CCRI), Department of Chemistry, University of Ottawa, Ottawa, ON K1N 6N5, Canada
Recommended Citation:
Kolle J.M.,Sayari A.. Substrate dependence on the fixation of CO2 to cyclic carbonates over reusable porous hybrid solids[J]. Journal of CO2 Utilization,2018-01-01,26