Continuous separation of CO 2 from H 2 + CO 2 gas mixture utilizing clathrate hydrate for integrated gasification combined cycle power plants

Shunsuke Horii, Ryo Ohmura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this study, the CO 2 continuous separation experiments were performed in the system of H 2 + CO 2 + H 2 O and H 2 + CO 2 + tetra-n-butylammonium bromide (TBAB) + H 2 O for TBAB mass fraction, w TBAB of 0 (the water system), 0.05, 0.10, 0.32. The time evolutions of compositions in the gas phase and the hydrate slurry were measured. The H 2 compositions in the gas phase for w TBAB of 0, 0.05, and 0.10 reached steady state at 0.87, 0.81, and 0.78 while the CO 2 compositions in the hydrate slurry were 1.00, 0.82, 0.79, respectively. It is shown that the experiments succeed in continuously separating CO 2 with structure I hydrate and ionic semiclathrate hydrate. On the other hand, the hydrate transportation problem in separation process occurred for w TBAB = 0.32. For w TBAB = 0, the highest values of H 2 compositions in the gas phase and CO 2 compositions in hydrate slurry were obtained. The concentration of captured CO 2 for w TBAB = 0 was comparable to that obtained by multistage process in hydrate-based gas separation or chemical absorption used in the demonstration project of integrated gasification combined cycle.

Original languageEnglish
Title of host publication2018 8th International Conference on Power and Energy Systems, ICPES 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages212-216
Number of pages5
ISBN (Electronic)9781538660287
DOIs
Publication statusPublished - 2019 Jan 25
Event8th International Conference on Power and Energy Systems, ICPES 2018 - Colombo, Sri Lanka
Duration: 2018 Dec 212018 Dec 22

Publication series

Name2018 8th International Conference on Power and Energy Systems, ICPES 2018

Conference

Conference8th International Conference on Power and Energy Systems, ICPES 2018
CountrySri Lanka
CityColombo
Period18/12/2118/12/22

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Keywords

  • Clathrate hydrate
  • CO separation
  • Ionic semiclathrate hydrate
  • Tetra-n-butylammonium bromide (TBAB)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Horii, S., & Ohmura, R. (2019). Continuous separation of CO 2 from H 2 + CO 2 gas mixture utilizing clathrate hydrate for integrated gasification combined cycle power plants In 2018 8th International Conference on Power and Energy Systems, ICPES 2018 (pp. 212-216). [8626934] (2018 8th International Conference on Power and Energy Systems, ICPES 2018). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICPESYS.2018.8626934