"Molecular basket" sorbents for separation of CO 2 and H 2S from various gas streams

Xiaoliang Ma, Xiaoxing Wang, Chunshan Song

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A new generation of "molecular basket" sorbents (MBS) has been developed by the optimum combination of the nanoporous material and CO 2/H 2S-philic polymer sorbent to increase the accessible sorption sites for CO 2 capture from flue gas (Postdecarbonization), and for CO 2 and H 2S separation from the reduced gases, such as synthesis gas, reformate (Predecarbonization), natural gas, coal/biomass gasification gas, and biogas. The sorption capacity of 140 mg of CO 2/g of sorb was achieved at 15 kPa CO 2 partial pressure, which shows superior performance in comparison with other known sorbents. In addition, an exceptional dependence of MBS sorption performance on temperature for CO 2 and H 2S was found and discussed at a molecular level via the computational chemistry approach. On the basis of the fundamental understanding of MBS sorption characteristics, an innovative sorption process was proposed an d demonstrated at the laboratory scale for removing and recovering CO 2 and H 2S, respectively, from a model gas. The present study provides a new approach for development of the novel CO 2/H 2S sorbents and may have a major impact on the advance of science and technology for CO 2/H 2S capture and separation from various gases.

Original languageEnglish (US)
Pages (from-to)5777-5783
Number of pages7
JournalJournal of the American Chemical Society
Issue number16
StatePublished - Apr 29 2009

All Science Journal Classification (ASJC) codes

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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