Preparation of nitrogen-doped hierarchical porous carbon materials by a template-free method and application to CO2 capture

The excessive emission of greenhouse gases such as carbon dioxide (CO 2 ) increases the average surface temperature of the earth through the greenhouse effect. Nitrogen-doped porous carbon materials are considered to be promising solid adsorbents for CO 2 capture. Herein we report a synthesis of nitrogen-doped porous carbon materials using a template-free method. The effects of different nitrogen sources and different carbon sources on the CO 2 adsorption performance of porous carbon materials were studied.The result indicated the ethylenediamine based porous carbon material showed the highest micropore volume and the most surface basic nitrogen atoms , and both lead to good CO 2 adsorption performance. Moreover, it was found that the sample maintained thermal and chemical stability in a long-term (ten cycles) CO 2 adsorption/desorption experiment.