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Nitrogen-Enriched Porous Polyacrylonitrile-Based Carbon Fibers for CO2 Capture
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-15 , DOI: 10.1021/acs.iecr.8b01836 Li Li 1, 2 , Xue-Fei Wang 1 , Jun-Jun Zhong 1 , Xin Qian 1 , Shu-Lin Song 1 , Yong-Gang Zhang 1 , De-Hong Li 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-08-15 , DOI: 10.1021/acs.iecr.8b01836 Li Li 1, 2 , Xue-Fei Wang 1 , Jun-Jun Zhong 1 , Xin Qian 1 , Shu-Lin Song 1 , Yong-Gang Zhang 1 , De-Hong Li 1
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Utilizing porous polyacrylonitrile (PAN) fibers as the precursors, porous carbon fibers were obtained by cross-linking of precursor fibers with hydrazine hydrate and subsequent heat treatment. A nitrogen content of more than 14 wt % was achieved in the carbon fibers. The porous carbon fiber that was prepared at low concentration of hydrazine hydrate (5 wt %) showed an optimal BET surface area of 277.4 m2/g with micro-/meso-/macropores. The CO2 adsorbed amount of this porous carbon fiber was 101 mg/g at 25 °C under atmospheric pressure, which was 2.1 times that of the fiber without cross-linking with hydrazine hydrate. In the simulated flue gas environment (10% CO2/90% N2), the adsorption capacity of the above-mentioned porous fiber was 32 mg/g at 25 °C, which was 1.4 times that of the fiber without cross-linking. These CO2 adsorption results demonstrated that the nitrogen functionalities and porous structure of the porous carbon fiber played an equivalent important role in the adsorption of CO2. The porous carbon fiber also owned an excellent CO2 reusability, and 96% of the adsorption capacity was maintained after 20 cycles of CO2 adsorption and desorption. The porous carbon fibers enriched with nitrogen could thus be a potential material for CO2 capture.
中文翻译：
富氮多孔聚丙烯腈基碳纤维，用于CO 2捕集
利用多孔聚丙烯腈（PAN）纤维作为前体，通过将前体纤维与水合肼交联并随后进行热处理，获得了多孔碳纤维。在碳纤维中实现了大于14wt％的氮含量。在低浓度的水合肼（5 wt％）下制备的多孔碳纤维显示最佳的BET表面积为277.4 m 2 / g，具有微孔/中孔/大孔。该多孔碳纤维在25℃，大气压下的CO 2吸附量为101mg / g，是不与水合肼交联的纤维的2.1倍。在模拟烟气环境中（10％CO 2 /90％N 2），上述多孔纤维在25℃下的吸附容量为32mg / g，是没有交联的纤维的1.4倍。这些CO 2吸附结果表明，多孔碳纤维的氮官能度和多孔结构在吸附CO 2中起着同等重要的作用。多孔碳纤维还具有优异的CO 2可重复使用性，并且在20次CO 2吸附和解吸循环之后保持了96％的吸附容量。因此，富含氮的多孔碳纤维可能是捕获CO 2的潜在材料。
更新日期：2018-08-16
中文翻译：
富氮多孔聚丙烯腈基碳纤维，用于CO 2捕集
利用多孔聚丙烯腈（PAN）纤维作为前体，通过将前体纤维与水合肼交联并随后进行热处理，获得了多孔碳纤维。在碳纤维中实现了大于14wt％的氮含量。在低浓度的水合肼（5 wt％）下制备的多孔碳纤维显示最佳的BET表面积为277.4 m 2 / g，具有微孔/中孔/大孔。该多孔碳纤维在25℃，大气压下的CO 2吸附量为101mg / g，是不与水合肼交联的纤维的2.1倍。在模拟烟气环境中（10％CO 2 /90％N 2），上述多孔纤维在25℃下的吸附容量为32mg / g，是没有交联的纤维的1.4倍。这些CO 2吸附结果表明，多孔碳纤维的氮官能度和多孔结构在吸附CO 2中起着同等重要的作用。多孔碳纤维还具有优异的CO 2可重复使用性，并且在20次CO 2吸附和解吸循环之后保持了96％的吸附容量。因此，富含氮的多孔碳纤维可能是捕获CO 2的潜在材料。
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