Efficient CO2 Capture by Porous, Nitrogen‐Doped Carbonaceous Adsorbents Derived from Task‐Specific Ionic Liquids

• DOI: 10.1002/cssc.201200355
• Publication Date: 2012-08-21T08:35:43Z
• Authors: Xiang Zhu; Patrick C. Hilles...; Shannon M. Mahurin; Congmin Wang; Chengcheng Tian; Suree Brown; Huimin Luo; Gabriel M. Veith; Kee Sung Han; Edward W. Hagaman; Honglai Liu; Sheng Dai
• Keywords: Nitrogen; Ionic Liquids; Adsorption; Carbon Dioxide; Porosity; 01 natural sciences; 7. Clean energy; 0104 chemical sciences

AbstractThe search for a better carbon dioxide (CO2) capture material is attracting significant attention because of an increase in anthropogenic emissions. Porous materials are considered to be among the most promising candidates. A series of porous, nitrogen‐doped carbons for CO2 capture have been developed by using high‐yield carbonization reactions from task‐specific ionic liquid (TSIL) precursors. Owing to strong interactions between the CO2 molecules and nitrogen‐containing basic sites within the carbon framework, the porous nitrogen‐doped compound derived from the carbonization of a TSIL at 500 °C, CN500, exhibits an exceptional CO2 absorption capacity of 193 mg of CO2 per g sorbent (4.39 mmol g−1 at 0 °C and 1 bar), which demonstrates a significantly higher capacity than previously reported adsorbents. The application of TSILs as precursors for porous materials provides a new avenue for the development of improved materials for carbon capture.