Kinetic modeling of CO2 adsorption on an amine-functionalized solid sorbent. (23rd February 2018)

• Record Type: Journal Article
• Authors: Jung, Wonho; Park, Junhyung; Lee, Kwang Soon
• Is Part Of: Chemical engineering science. Volume 177(2018)
• Page Start: 122
• Page End: 131
• Publication Date: 2018-02-23
• Subjects: Kinetic modeling -- Amine-functionalized solid sorbent -- Dynamics compensation -- Carbon dioxide; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; Chemical engineering; Periodicals; Electronic journals; 660
• DOI: 10.1016/j.ces.2017.11.003
• Languages: English
• ISSNs: 0009-2509

Abstract

Highlights: A kinetic model for CO2 adsorption on a PEI-functionalized sorbent is studied. An Autochem® reactor system was used to obtain experimental data. Long-tails in adsorption breakthrough curves could be accurately represented. Desorption patterns of the sorbent could be accurately represented. Abstract: A kinetic model of CO2 adsorption on an amine-functionalized silica sorbent, 0.37EB-PEI, was proposed by using experimental data from a miniature isothermal fixed bed reactor system called Autochem. Breakthrough curve tests were conducted at different CO2 concentrations and different temperatures to acquire experimental data under adsorption-dominant conditions. Additionally, temperature programmed desorption (TPD) experiments were carried out for different CO2 concentrations with different starting temperatures to investigate the desorption kinetics. A modified Langmuir kinetic equation was found to provide a satisfactory representation of the adsorption-dominant experimental data, including the long tails. A separate kinetic model was proposed to express the desorption-dominant TPD data. The dynamic effects of the empty volume in the Autochem device on the experimental measurements were rigorously handled through separate empty-volume dynamic tests.