Preparation and characterization of polyethylenimine-modified mesoporous silicas as CO2 sorbents

摘要：

Functionalization of MCM-48 and SBA-15 mesoporous silicas with polyethylenimine (PEI) has been achieved using the wet impregnation technique, and the obtained materials have been tested as media for CO2 adsorption. Increasing PEI loading resulted in decreasing of the surface area and pore size of the potential adsorbents. PEI-modified mesoporous systems did not sorb any N2 at 77 K, on the contrary both materials were able to sorb large amounts of CO2 at 348 K and at very low pressure. At PEI loading of 50 wt％ in MCM-48 and 44 wt％ in SBA-15 adsorption capacities over 6 wt％ were obtained. CO2 desorption from the mesoporous silica samples under vacuum was close to 100％. These materials could be successfully used as sorbents to capture CO2 after combustion or as H2 stream purification media.

作者: N. Gargiulo D. Caputo C. Colella

作者单位: Dipartimento di Ingegneria dei Materiali e della Produzione, Università Federico II, P.le V.Tecchio 80, 80125 Napoli, Italy

会议类型: 国际会议

会议名称: 第15届国际分子筛大会

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-12（万方平台首次上网日期，不代表论文的发表时间）