CO2-Sorption enhanced reaction for the production of high-purity hydrogen from synthesis gas produced by coal gasification

Ki Bong Lee, Jung Moo Lee, Sang Goo Jeon, Jeong Geol Na, Ho Jung Ryu

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

Abstract

CO2-sorption enhanced water gas shift (WGS) reaction is a process which carries out simultaneously the WGS reaction for the production of a pure stream of H2 and the removal of CO2 from the reaction zone by using a CO2 sorbent in a single unit operation. The sorption enhanced reaction (SER) can circumvent the thermodynamic limitation of the WGS reaction and enhance the rate of forward reaction. To fulfill the SER concept successfully, the development of CO2 adsorbents that can adsorb CO2 at high temperature (200-400°C) is most important. In this study, K2CO3-promoted hydrotalcite was tested for a high-temperature CO2 chemisorbent and its CO2 sorption characteristics were analyzed. The thermogravimetric analysis showed that CO2 sorption capacity of K2CO3-promoted hydrotalcite can be about ten times higher than that of pristine hydrotalcite. Also, there is an optimal amount of K2CO3 impregnated for the highest CO2 sorption capacity. Using the K2CO 3-promoted hydrotalcite, the SER concept for WGS was successfully tested by both experiments and numerical simulations.

Original languageEnglish
Title of host publicationProceedings of the 20th (2010) International Offshore and Polar Engineering Conference, ISOPE-2010
Pages58-63
Number of pages6
Publication statusPublished - 2010
Event20th International Offshore and Polar Engineering Conference, ISOPE-2010 - Beijing, China
Duration: 2010 Jun 202010 Jun 25

Publication series

NameProceedings of the International Offshore and Polar Engineering Conference
Volume1
ISSN (Print)1098-6189
ISSN (Electronic)1555-1792

Other

Other20th International Offshore and Polar Engineering Conference, ISOPE-2010
CountryChina
CityBeijing
Period10/6/2010/6/25

Keywords

  • CO
  • Coal
  • Hydrogen
  • Sorption enhanced reaction
  • Synthesis gas
  • Water gas shift

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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  • Cite this

    Lee, K. B., Lee, J. M., Jeon, S. G., Na, J. G., & Ryu, H. J. (2010). CO2-Sorption enhanced reaction for the production of high-purity hydrogen from synthesis gas produced by coal gasification. In Proceedings of the 20th (2010) International Offshore and Polar Engineering Conference, ISOPE-2010 (pp. 58-63). (Proceedings of the International Offshore and Polar Engineering Conference; Vol. 1).