Conversion of carbon dioxide into cyclic carbonates using wool powder-KI as catalyst. (March 2018)

• Record Type: Journal Article
• Authors: Chang, Haibo; Li, Qingshuo; Cui, Xuemin; Wang, Hongxia; Bu, Zhanwei; Qiao, Congzhen; Lin, Tong
• Is Part Of: Journal of CO₂ utilization. Volume 24(2018)
• Page Start: 174
• Page End: 179
• Publication Date: 2018-03
• Subjects: Carbon dioxide -- Wool powder -- Epoxide -- Cycloaddition reaction -- Synergetic effect; 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.2017.12.017
• Languages: English
• ISSNs: 2212-9820

Abstract

Graphical abstract: Highlights: WP-KI is an efficient catalyst system for the cycloaddition of CO2 under solvent-free condition. Synergetic catalytic effect occurs between WP and KI in the reaction. WP-KI is stable and usable for multicycle reaction. The strategy producing cyclic carbonate in an environmentally-friendly manner. Abstract: Chemical conversion of carbon dioxide (CO2 ) into usable materials offer opportunities to use carbon dioxide as a sustainable carbon source, but remains difficult to make. In this study, wool powder (WP), fine particles produced from natural wool fibers, was used as a catalyst for cycloaddition coupling of CO2 with propylene oxide (PO) to form propylene carbonate (PC) in a solvent free condition. Potassium halide (KCl, KBr and KI), tetrabutylammonium iodide (TBAI), 1, 8-diazabicyclo[5.4.0]-undec-7-ene (DBU), and N, N -dimethylaminopyridine (DMAP) were used separately as co-catalyst. A synergetic effect was found between WP and KI, which shows the optimal efficiency when a low amount of the catalyst (e.g. 1.0 mol% KI relative to PO, WP: KI = 2:1 wt/wt) was employed at 1.5 MPa and 120 °C. The catalyst can be repeatedly used for five cycles without apparently losing the activity. It could be used to catalyze coupling of other mono-substituted terminal epoxides with CO2 . Wool powder-KI may serve as an efficient, green catalyst system for the fixation of CO2 .