Nitrogen-Enriched Porous Polyacrylonitrile-Based Carbon Fibers for CO2 Capture

• DOI: 10.1021/acs.iecr.8b01836
• Publication Date: 2018-07-31T22:05:20Z
• Authors: Li Li; Xue-Fei Wang; Jun-Jun Zhong; Xin Qian; Shu-Lin Song; Yong-Gang Zhang; De-Hong Li
• Keywords: Polyacrylonitrile; Hydrazine (antidepressant); Carbon fibers

Utilizing porous polyacrylonitrile (PAN) fibers as the precursors, carbon were obtained by cross-linking of precursor with hydrazine hydrate and subsequent heat treatment. A nitrogen content more than 14 wt % was achieved in fibers. The fiber that prepared at low concentration (5 %) showed an optimal BET surface area 277.4 m2/g micro-/meso-/macropores. CO2 adsorbed amount this 101 mg/g 25 °C under atmospheric pressure, which 2.1 times without hydrate. In simulated flue gas environment (10% CO2/90% N2), adsorption capacity above-mentioned 32 °C, 1.4 cross-linking. These results demonstrated functionalities structure played equivalent important role CO2. also owned excellent reusability, 96% maintained after 20 cycles desorption. enriched could thus be a potential material for capture.