کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
65642 | 48399 | 2013 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Highly active and selective binary catalyst system for the coupling reaction of CO2 and hydrous epoxides Highly active and selective binary catalyst system for the coupling reaction of CO2 and hydrous epoxides](/preview/png/65642.png)
• The coupling reaction had nearly 100% productivity and 100% selectivity.
• The effect of water on the coupling reaction of CO2-epoxide could be minimized.
• Zn–CoIII DMCC was suitable to various epoxides and required no solvent.
Although most of the zinc-containing catalysts show excellent catalytic activity for the coupling reaction of carbon dioxide (CO2) with epoxides, generally, trace amounts of water in the reaction systems could cause a significant decrease of the catalytic activity. In this work, a nanoporous zinc-cobalt double metal cyanide complex (Zn–CoIII DMCC) with high surface area was synthesized via a modified hydrothermal process using tri-block copolymer EO20PO70EO20 (P123) as the template. When cetyltrimethylammonium bromide (CTAB) was used as the co-catalyst, the Zn–CoIII DMCC/CTAB binary catalyst system could effectively catalyze the coupling reaction of CO2 with hydrous propylene oxide (PO), producing propylene carbonate (PC) with nearly 100% productivity and 100% selectivity. This binary catalyst system could also catalyze the coupling reaction of other commercial epoxides and CO2 without using any solvents with nearly 100% productivity and 100% selectivity. With such new catalyst system, hundreds of ppm water in the reaction system will no longer be the matter.
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Journal: Journal of Molecular Catalysis A: Chemical - Volume 379, 15 November 2013, Pages 38–45