DMF and mesoporous Zn/SBA-15 as synergistic catalysts for the cycloaddition of CO2 to propylene oxide. Issue 9 (March 2015)

• Record Type: Journal Article
• Authors: Zhong, Shifa; Liang, Lin; Liu, Mengshuai; Liu, Bo; Sun, Jianmin
• Is Part Of: Journal of CO₂ utilization. Issue 9(2015)Supplement
• Page Start: 58
• Page End: 65
• Publication Date: 2015-03
• Subjects: CO2 -- Zn/SBA-15 -- DMF -- Acid–base catalysts -- Propylene carbonate; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2014.12.006
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Zn/SBA-15 and DMF showed high activity for the cycloaddition of CO2 to propylene oxide due to their synergistic effects, where DMF activated CO2 and Zn/SBA-15 activated propylene oxide. Highlights: Zn/SBA-15 and DMF showed high activity for cycloaddition of CO2 to propylene oxide. DMF activated CO2 and Zn/SBA-15 activated propylene oxide. Highly active Zn/SBA-15 and DMF catalysts are simple and facile available. Abstract: A series of Zn/SBA-15 samples with Zn/Si molar ratios from 0.06 to 0.18 were prepared by one-pot synthesis method. XRD, N2 adsorption/desorption, TEM, FTIR and XPS techniques were used to determine the textual structures and physicochemical properties of Zn/SBA-15 samples. The mesoporous structure of SBA-15 was well preserved with Zn/Si molar ratio up to 0.18. Thereafter, Zn/SBA-15 was tested for the cycloaddition reaction of CO2 and propylene oxide to produce propylene carbonate in the presence of DMF. The catalytic results showed that Zn/SBA-15 and DMF synergistically catalyzed the cycloaddition of CO2 to propylene oxide. Moreover, the effects of various reaction factors, including different metal elements modified SBA-15, reaction temperature, CO2 pressure, reaction time and DMF amount were also discussed in detail. Propylene carbonate yield as high as 92.3% was achieved on Zn/SBA-15(0.15) catalyst at 160 °C and 2 MPa of CO2 pressure for 6 h in the presence of DMF. In addition, the recycling property of Zn/SBA-15 catalyst was also investigated. A possible catalytic mechanism for the cycloaddition of CO2 to propylene oxide was proposed.