Melem based multifunctional catalyst for chemical fixation of carbon dioxide into cyclic carbonate

作者：Song, Xianghai; Wu, Yuanfeng; Pan, Donghui; Wei, Ruiping; Gao, Lijing; Zhang, Jin; Xiao, Guomin^*

来源：Journal of CO2 Utilization, 2018, 24: 287-297.

DOI：10.1016/j.jcou.2018.01.017

• Multifunctional melem oligomers
• Carbon dioxide
• Epoxides
• Cyclic carbonate

In the present work, melem based catalysts with various functional groups were developed by the modification of melem oligomers and tested for the chemical fixation of CO2 into cyclic carbonates. The characterization of these catalysts, by means of SEM, BET, XRD, IR, TG and XPS, verified the functional groups are successfully incorporated into the melem oligomers structure. Activity test demonstrated that melem oligomers grafted with both hydroxyl and quaternary ammonium groups (MOSB) presented the best catalytic performance. A propylene oxide conversion of 97.4% and propylene carbonate selectivity of 97.8% were obtained under the optimal reaction conditions. The simultaneous existence of edge defects, hydroxyl groups and quaternary ammonium groups in the structure of the catalyst are responsible for the high performance of MOSB. These three groups synergistically catalyzed the chemical fixation of CO2 to proceed with high efficiency. Moreover, moderate yield could still be obtained after five cycles. A possible reaction mechanism was proposed for the cycloaddition of CO2 with epoxides to form cyclic carbonates.

• 出版日期2018-3
• 单位东南大学