廉价高效氧化硅基CO_(2)吸附剂的制备及性能研究  

Preparation and properties of cheap-efficient silica based CO_(2) sorbents

作　　者：缪杭锦 钟雯诗 姜伟 胡庚申[1] MIAO Hang-jin;ZHONG Wen-shi;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》2021年第6期994-1000,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);浙江师范大学实验技术开发项目(SJ202111)。

摘　　要：为了解决“分子篮”固体吸附剂载体成本高的缺点,以廉价SiO_(2)纳米粒子作为吸附剂的载体,通过浸渍法制备了固体吸附剂。通过扫描电镜、透射电镜、物理吸附、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)吸附性能进行了测试。结果表明,粒径小(6 nm)且比表面积高(321 m^(2)×g^(-1))的SiO_(2)纳米粒子基吸附剂(50PEHA/6SiO_(2))比高成本的50PEHA/SBA-15吸附剂表现出有更优的CO_(2)吸附能力,这是由于50PEHA/6SiO_(2)具有开放的结构和较低的传质阻力。50PEHA/6SiO_(2)吸附剂也表现出良好的再生性能。50PEHA/6SiO_(2)吸附剂的低成本和优异的CO_(2)捕获能力展现出良好的实际应用前景。In order to overcome high costs of supports for"molecular basket"solid sorbents,cheap SiO_(2) nanoparticles were used as the support to prepare solid sorbents through wet-impregnation.The sorbents were characterized by scanning electron microscopy,transmission electron microscopy,physical adsorption and thermogravimetric analysis.CO_(2) sorption performance was tested using breakthrough curves.The results show that the sorbent(50PEHA/6SiO_(2))based on the SiO_(2) nanoparticles with smaller size(6 nm)and higher surface area(321 m^(2)·g^(-1))shows better CO_(2) adsorption capacity than the expensive 50PEHA/SBA-15 sorbent,which is due to the open structure and lower mass transfer resistance of 50PEHA/6SiO_(2).50PEHA/6SiO_(2) also showed good regeneration performance.50PEHA/6SiO_(2) sorbents show good practical application prospects due to low cost and excellent CO_(2) capture capability.

关 键 词：二氧化碳捕获 二氧化硅纳米粒子(SiO_(2)) 开放结构 五乙烯六胺(PEHA) 

分 类 号：O647.32[理学—物理化学]