Thermal Stability Enhanced Tetraethylenepentamine/Silica Adsorbents for High Performance CO2 Capture
- Authors
- Park, Sunghyun; Choi, Keunsu; Yu, Hyun Jung; Won, Young-June; Kim, Chaehoon; Choi, Minkee; Cho, So-Hye; Lee, Jung-Hyun; Lee, Seung Yong; Lee, Jong Suk
- Issue Date
- 4-4월-2018
- Publisher
- AMER CHEMICAL SOC
- Citation
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, v.57, no.13, pp.4632 - 4639
- Indexed
- SCIE
SCOPUS
- Journal Title
- INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
- Volume
- 57
- Number
- 13
- Start Page
- 4632
- End Page
- 4639
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/76165
- DOI
- 10.1021/acs.iecr.7b04912
- ISSN
- 0888-5885
- Abstract
- Tetraethylenepentamine (TEPA), consisting mainly of primary and secondary amines, exhibits a high CO2 sorption capacity; however, its poor thermal stability hampers process for CO2 capture. Here, a facile functionalization of practical utilization in the temperature swing adsorption TEPA with 1,2-epoxybutane (EB) substantially enhanced its thermal stability as well as the CO2 adsorption kinetics. Our careful analysis on the liquid-state C-13 NMR disclosed the amine state distribution of EB-functionalized TEPA (EB-TEPA). Although the increase in tertiary amine portion induced by EB-functionalization reduced CO2 sorption capacity, the 0.64EB-TEPA (i.e., TEPA functionalized with EB with a TEPA/EB molar ratio of 1:3)/SiO2 showed an excellent long-term stability over the 10 consecutive cycles of adsorption/desorption processes with a CO2 swing capacity of 2.0 mmol CO2 g(-1) under dry CO2/N-2 (15/85 mol/mol) feed conditions. Also, the first-principles calculation identified the configuration of modified TEPA molecules with XRD measurements, supporting an easy access of CO2 into amine moieties of our modified TEPA molecules.
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