可再生固态胺纤维PPAM对CO_2的吸附性能

Investigation on CO_2 Adsorption Properties of a Regenerative Solid Amine Fiber PPAM

目的以聚丙烯纤维为基体,制备一种对CO2具有良好吸附性能的固态胺纤维PPAM,并探究其吸附性能。方法通过预辐照接枝制备PPAM,以红外、热重、元素分析及电子显微镜分析等手段表征PPAM的化学与物理结构及其稳定性。从胺化率、吸附温度等方面评价材料对CO2的吸附性能。结果高胺化率有利于PPAM材料对CO2的吸附。该材料在30℃下能达到最高吸附容量4.72 mmol/g。经过5次循环再生吸附后,吸附容量仍能达到初次吸附量的99%。结论 PPAM具有良好的热稳定性,对CO2具有高吸附容量和优异的循环再生性能,是一种理想的固态胺吸附剂。

Objective To synthesize a solid amine fiber PPAM for CO2 capture with polypropylene （PP） fiber as a substrate and evaluate its CO2 adsorption properties. Methods PPAM was prepared by pre-irradiated grafting with acylamide （AM） onto PP fibers. The chemical and physical properties of PPAM were characterized with FT-IR, TG, EA, SEM, and so on. Its CO2 adsorption capacity was evaluated. Results Higher amination degree of PPAM was favorable for CO2 adsorption. Its highest adsorption capacity was 4.72 mmol/g at the optimal temperature of 30 ℃. PPAM could maintain 99% of its adsorption capacity after 5 adsorption-desorption cycles. Conclusion PPAM fiber proves to be an ideal solid CO2 absorbent with excellent thermal stability, high CO2 adsorption capacity and satisfying regeneration property.