Shape-tailorable amine grafted silica aerogel microsphere for CO_(2) capture

作     者：Xing Jiang Jian Ren Yong Kong Zhiyang Zhao Xiaodong Shen Maohong Fan Xing Jiang;Jian Ren;Yong Kong;Zhiyang Zhao;Xiaodong Shen;Maohong Fan

作者机构：College of Materials Science and EngineeringNanjing Tech UniversityNanjing210009PR China Department of Chemical and Petroleum EngineeringUniversity of WyomingLaramieWY82071USA Jiangsu Collaborative Innovation Center for Advanced Inorganic Function CompositesNanjing210009PR China School of Civil and Environmental EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA Suqian Advanced Materials Industry Technology Innovation Center of Nanjing Tech UniversitySuqian223800PR China 

出 版 物：《Green Chemical Engineering》 (绿色化学工程（英文）)

年 卷 期：2020年第1卷第2期

页      面：140-146页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supports from the National Natural Science Foundation of China(51602151) the Natural Science Foundation of Jiangsu Province-China(BK20161003) the Project funded by China Postdoctoral Science Foundation(2018T110490,2018M642228) the Priority Academic Program Development of Jiangsu Higher Education Institution(PAPD)-China. 

主　　题：Silica aerogel Microsphere Amine grafting CO_(2)adsorption 

摘      要：The purpose of this study was to prepare a proof-of-concept CO_(2) adsorbing material based on a new amine grafted silica aerogel microsphere(AGSAM)that could be used on both fixed and fluidized beds.A low-cost water glass and environment-friendly water were used as precursor and solvent of the silica aerogel,respectively.The silica aerogel microsphere(SAM)was prepared by dropping the siliceous solution into hot oil bath.The effect of the pH value of the siliceous solution,stirring speed and stirring paddle position on the sphericity and size of the SAM was investigated.The SAM with good sphericity was obtained when the pH value was 5.69–5.79.The mean diameter of the SAM decreased from 5 to 1 mm when the stirring speed increased from 1000 to 2000 rpm.The SAM with excellent sphericity was prepared when the paddle was placed on the top of the oil bath.When the paddle was placed at the middle and bottom of the oil bath,some liquid drops aggregated together and formed large aggregations.AGSAM was obtained by grafting the amine groups onto the framework of the silica gel microsphere.The CO2 adsorption capacity of the AGSAM was 1.04 mmol g^(-1) with 1%CO2 at 300 mL min^(-1).The AGSAM with 4,3.2,2 and 1 mm in diameters had the fluidizing velocities of 0.531,0.425,0.265 and 0.159 m s^(-1),respectively.The AGSAM with different sizes met different fluidizing conditions.