title: Gravimetric analysis of the adsorption and desorption of CO2 on amine-functionalized mesoporous silica mounted on a microcantilever array.
abstract: The kinetics of CO(2) adsorption and desorption over amine-functionalized mesoporous silica were investigated using silicon microcantilever arrays. Three types of mesoporous silica with different pore sizes were synthesized and functionalized with a variety of amine molecules. After depositing the silica sorbents onto the free end of each cantilever in an array, mass changes due to the adsorption and desorption of CO(2) were determined in situ with picogram sensitivity by measuring variations in the cantilever frequencies. The adsorption and desorption kinetics were found to be diffusion-controlled, and the kinetics were accelerated by increasing the temperature and pore size. The activation energies for adsorption and desorption of CO(2) were determined from Arrhenius plots.
authors.affiliation: Department of Chemical Engineering, Pohang University of Science and Technology, San 31 Namgu Hyojadong, Pohang, Korea.
authors.forename: Dongkyu
authors.initials: D
authors.lastname: Lee
authors.forename: Yusung
authors.initials: Y
authors.lastname: Jin
authors.forename: Namchul
authors.initials: N
authors.lastname: Jung
authors.forename: Jaehyuk
authors.initials: J
authors.lastname: Lee
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Lee
authors.forename: Yong Shik
authors.initials: YS
authors.lastname: Jeong
authors.forename: Sangmin
authors.initials: S
authors.lastname: Jeon
mesh_terms: D000327:Adsorption; D000588:Amines / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry*; D057232:Global Warming / Q000517:prevention & control*; D007700:Kinetics; D017640:Silicates / Q000737:chemistry*
chemical_list: D000588:Amines; D017640:Silicates; D002245:Carbon Dioxide