柔性碳纤维基吸附剂的制备及CO_(2)吸附性能  

Preparation of flexible carbon fiber based sorbents and their CO_(2) capture performance

作　　者：元慧力 钟雯诗 郑淑娟 姜伟 胡庚申[1] YUAN Hui-li;ZHONG Wen-shi;ZHENG Shu-juan;JIANG Wei;HU Geng-shen(Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua 321004,China)

机构地区：[1]浙江师范大学先进催化剂材料教育部重点实验室,浙江金华321004

出　　处：《高校化学工程学报》2023年第1期61-67,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：浙江省自然科学基金(LY21G010005);国家自然科学基金(21203167)。

摘　　要：为了解决粉末状固体吸附剂成本高、传质阻力大的缺点,以棉花碳化制得的碳纤维作为吸附剂载体,通过浸渍法负载五乙烯六胺(PEHA)制备了固体有机胺吸附剂。通过扫描电镜、物理吸附、红外、热重分析等对吸附剂进行表征,采用穿透曲线法对吸附剂的CO_(2)吸附性能进行测试。结果表明,在500℃碳化得到的碳纤维C500具有最大的比表面积(471 m^(2)·g^(-1))。50PEHA/C500吸附剂在75℃时吸附量可达到4.05 mmol·g^(-1),CO_(2)吸附性能优异。对比粉末吸附剂,碳纤维之间具有更大的空隙,放大实验表明,50PEHA/C500比介孔氧化硅基吸附剂(50PEHA/SBA-15)具有更小的传质阻力。循环测试结果表明50PEHA/C500吸附剂具有优秀的再生性能。50PEHA/C500基吸附剂具有低成本、低传质阻力和优异的CO_(2)捕获能力,展现出良好的应用前景。Powdered solid sorbents have problems of high cost and large mass transfer resistance.In this study,carbon fibers derived from carbonized cotton were used as supports,and solid amine sorbents were prepared by impregnating pentaethylenehexamine (PEHA) onto the carbon fibers.The sorbents were characterized by scanning electron microscopy,physical adsorption,infrared and thermogravimetric analysis.The CO_(2)adsorption performance of the sorbents were tested by the breakthrough curve method.The results show that carbon fiber C500 which was carbonized at 500℃has the largest specific surface area (471 m^(2)·g^(-1)).The adsorption capacity of the 50PEHA/C500 adsorbent reached 4.05 mmol·g^(-1)at 75℃with excellent adsorption CO_(2)performance.Compared with powder adsorbents,the carbon fibers have larger voids,and the scale-up experiment confirmed that 50PEHA/C500 has a smaller mass transfer resistance than 50PEHA/SBA-15.The cycle test results show that the 50PEHA/C500 adsorbent has excellent regeneration performance.The50PEHA/C500-based adsorbent has low cost,low mass transfer resistance and excellent CO_(2)capture capacity,which shows good application prospects.

关 键 词：碳捕集 碳纤维 传质阻力 五乙烯六胺(PEHA) 

分 类 号：O647.32[理学—物理化学]