Conversion of carbon dioxide into cyclic carbonates using wool powder-KI as catalyst

作者：Chang, Haibo^*; Li, Qingshuo; Cui, Xuemin; Wang, Hongxia; Bu, Zhanwei; Qiao, Congzhen; Lin, Tong^*

来源：Journal of CO2 Utilization, 2018, 24: 174-179.

DOI：10.1016/j.jcou.2017.12.017

• Carbon dioxide
• Wool powder
• Epoxide
• Cycloaddition reaction
• Synergetic effect

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 degrees 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.

• 出版日期2018-3
• 单位河南大学