Reversible chemisorbents for carbon dioxide and their potential applications

Ki Bong Lee, Michael G. Beaver, Hugo S. Caram, Shivaji Sircar

Research output: Contribution to journalArticle

146 Citations (Scopus)

Abstract

Physisorbents like zeolites, activated carbons, silica, and alumina gels have been traditionally used for separation of bulk or trace carbon dioxide from a gas mixture using a pressure or a thermal swing adsorption process. These processes are generally operated at near ambient or at moderate temperatures (say <100 °C) because the equilibrium sorption capacity and selectivity of sorption of CO2 on the physi-sorbents rapidly decrease at higher temperatures. Recently, a variety of reversible CO2 chemisorbents have been developed which offer decent sorption capacity and high selectivity for CO2 at relatively higher temperatures (∼150 to 500° C). Some of these chemisorbents even exhibit high selectivity of CO2 sorption in the presence of H2O which is mechanistically impossible for a physisorbent. Consequently, these chemisorbents can be used in (a) sorption enhanced reaction (SER) concepts for production of fuel-cell grade H2 from natural gas by low temperature steam-methane reformation reaction at ca. 400-500° C or from synthesis gas by water-gas shift reaction at ca. 200-400° C, and (b) removal and recovery of CO2 from a flue gas at a temperature of 150-200° C without precooling, predrying, and precompression. A comprehensive review of this subject is presented.

Original languageEnglish
Pages (from-to)8048-8062
Number of pages15
JournalIndustrial and Engineering Chemistry Research
Volume47
Issue number21
DOIs
Publication statusPublished - 2008 Nov 5
Externally publishedYes

Fingerprint

Carbon Dioxide
Sorption
Carbon dioxide
Temperature
Zeolites
Water gas shift
Aluminum Oxide
Synthesis gas
Methane
Steam
Sorbents
Flue gases
Gas mixtures
Silicon Dioxide
Activated carbon
Fuel cells
Natural gas
Alumina
Gels
Silica

ASJC Scopus subject areas

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

Cite this

Reversible chemisorbents for carbon dioxide and their potential applications. / Lee, Ki Bong; Beaver, Michael G.; Caram, Hugo S.; Sircar, Shivaji.

In: Industrial and Engineering Chemistry Research, Vol. 47, No. 21, 05.11.2008, p. 8048-8062.

Research output: Contribution to journalArticle

Lee, Ki Bong ; Beaver, Michael G. ; Caram, Hugo S. ; Sircar, Shivaji. / Reversible chemisorbents for carbon dioxide and their potential applications. In: Industrial and Engineering Chemistry Research. 2008 ; Vol. 47, No. 21. pp. 8048-8062.
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