Thermal Stability Enhanced Tetraethylenepentamine/Silica Adsorbents for High Performance CO2 Capture

Sunghyun Park, Keunsu Choi, Hyun Jung Yu, Young June Won, Chaehoon Kim, Minkee Choi, So Hye Cho, Jung-hyun Lee, Seung Yong Lee, Jong Suk Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Tetraethylenepentamine (TEPA), consisting mainly of primary and secondary amines, exhibits a high CO2 sorption capacity; however, its poor thermal stability hampers practical utilization in the temperature swing adsorption process for CO2 capture. Here, a facile functionalization of 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 13C 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/N2 (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.

Original languageEnglish
Pages (from-to)4632-4639
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume57
Issue number13
DOIs
Publication statusPublished - 2018 Apr 4

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Silicon Dioxide
Adsorbents
Amines
Thermodynamic stability
Silica
Adsorption
Sorption
1,2-epoxybutane
Molecules
Desorption
Nuclear magnetic resonance
Kinetics
tetraethylenepentamine
Liquids
Temperature

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Thermal Stability Enhanced Tetraethylenepentamine/Silica Adsorbents for High Performance CO2 Capture. / 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.

In: Industrial and Engineering Chemistry Research, Vol. 57, No. 13, 04.04.2018, p. 4632-4639.

Research output: Contribution to journalArticle

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. / Thermal Stability Enhanced Tetraethylenepentamine/Silica Adsorbents for High Performance CO2 Capture. In: Industrial and Engineering Chemistry Research. 2018 ; Vol. 57, No. 13. pp. 4632-4639.
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