“干胺”型吸附剂的快速制备、表征及其CO2吸附性能研究  

Facile Preparation, Characterization and CO_2 Adsorption Performance of "Dry Amine" Adsorbents

作　　者：唐秋平[1] 付诗玉 徐芳丽[1] 姜伟[1] 胡庚申[1] TANG Qiu-ping;FU Shi-yu;XU Fang-li;JIANG Wei;HU Geng-shen(Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry,Zhejiang Normal University, Jinhua 321004, China)

机构地区：[1]先进催化剂材料教育部重点实验室,浙江师范大学物理化学研究所,浙江金华321004

出　　处：《高校化学工程学报》2017年第4期827-833,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(2020619);浙江省自然科学基金(LQ13G020010,LY16B070001)

摘　　要：通过高速搅拌法将聚乙烯亚胺(PEI)快速负载于疏水性SiO_2表面,制得"干胺"型吸附剂。利用扫描电镜、透射电镜、物理吸附、热重分析等对吸附剂进行了一系列的表征。采用穿透曲线法对"干胺"吸附剂的CO_2吸附性能进行了测试.。结果表明,随着PEI负载量的增加,PEI/SiO_2吸附剂的CO_2吸附量呈现先增加后降低的趋势,50PEI/SiO_2吸附剂的CO_2吸附量最高,其最佳CO_2吸附温度为90°C,此时吸附剂的吸附量最大为3.00 mmol×g^(-1)-adsorbent。相比于高速搅拌法制备的SBA-15基吸附剂,PEI/SiO_2型吸附剂具有更优的吸附性能。研究结果还表明50PEI/SiO_2具有良好的可再生性能。Polyethylenimine(PEI)was dispersed on hydrophobic silica nanoparticles by high-speed stirringand the obtained adsorbent was named as“dry amine”adsorbent.The prepared adsorbent was characterized byscanning electron microscopy(SEM),transmission electron microscopy(TEM),nitrogen adsorption/desorptionand thermogravimetric analysis(TGA).The results show that CO2uptake increases first and then decreases withthe increase of PEI loading.The maximum adsorption capacity(3.00mmol.g-1)is obtained at50%(wt)PEIloading at the optimal temperature of90oC.The50PEI/SBA-15adsorbent prepared with high-speed stirringshows a relatively low CO2adsorption capacity(2.38mmol.g-1).Moreover,the PEI/SiO2adsorbent shows goodregenerability.

关 键 词：氧化硅 聚乙烯亚胺(PEI) 干胺 CO2捕捉 

分 类 号：O643[理学—物理化学]