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Title: 'Molecular Basket' sorbents for separation of CO{sub 2} and H{sub 2}S from various gas streams

Abstract

A new generation of 'molecular basket' sorbents (MBS) has been developed by the optimum combination of the nanoporous material and CO{sub 2}/H{sub 2}S-philic polymer sorbent to increase the accessible sorption sites for CO{sub 2} capture from flue gas (Postdecarbonization), and for CO{sub 2} and H{sub 2}S 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{sub 2}/g of sorb was achieved at 15 kPa CO{sub 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{sub 2} and H{sub 2}S 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 and demonstrated at the laboratory scale for removing and recovering CO{sub 2} and H{sub 2}S, respectively, from a model gas. The present study provides a new approach for development of the novel CO{sub 2}/H{sub 2}S sorbents and may have a major impact on the advance of science and technology for CO{sub 2}/H{sub 2}S capture and separation from various gases.

Authors:
; ;  [1]
  1. Penn State University, University Park, PA (United States)
Publication Date:
OSTI Identifier:
21187084
Resource Type:
Journal Article
Journal Name:
Journal of the American Chemical Society
Additional Journal Information:
Journal Volume: 131; Journal Issue: 16; Journal ID: ISSN 0002-7863
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; ADSORBENTS; CARBON DIOXIDE; HYDROGEN SULFIDES; DESULFURIZATION; PORE STRUCTURE; POLYMERS; FLUE GAS; CAPTURE; SYNTHESIS GAS; ADSORPTION; REMOVAL; MOLECULAR SIEVES

Citation Formats

Ma, X L, Wang, X X, and Song, C S. 'Molecular Basket' sorbents for separation of CO{sub 2} and H{sub 2}S from various gas streams. United States: N. p., 2009. Web. doi:10.1021/ja8074105.
Ma, X L, Wang, X X, & Song, C S. 'Molecular Basket' sorbents for separation of CO{sub 2} and H{sub 2}S from various gas streams. United States. https://doi.org/10.1021/ja8074105
Ma, X L, Wang, X X, and Song, C S. 2009. "'Molecular Basket' sorbents for separation of CO{sub 2} and H{sub 2}S from various gas streams". United States. https://doi.org/10.1021/ja8074105.
@article{osti_21187084,
title = {'Molecular Basket' sorbents for separation of CO{sub 2} and H{sub 2}S from various gas streams},
author = {Ma, X L and Wang, X X and Song, C S},
abstractNote = {A new generation of 'molecular basket' sorbents (MBS) has been developed by the optimum combination of the nanoporous material and CO{sub 2}/H{sub 2}S-philic polymer sorbent to increase the accessible sorption sites for CO{sub 2} capture from flue gas (Postdecarbonization), and for CO{sub 2} and H{sub 2}S 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{sub 2}/g of sorb was achieved at 15 kPa CO{sub 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{sub 2} and H{sub 2}S 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 and demonstrated at the laboratory scale for removing and recovering CO{sub 2} and H{sub 2}S, respectively, from a model gas. The present study provides a new approach for development of the novel CO{sub 2}/H{sub 2}S sorbents and may have a major impact on the advance of science and technology for CO{sub 2}/H{sub 2}S capture and separation from various gases.},
doi = {10.1021/ja8074105},
url = {https://www.osti.gov/biblio/21187084}, journal = {Journal of the American Chemical Society},
issn = {0002-7863},
number = 16,
volume = 131,
place = {United States},
year = {Wed Apr 15 00:00:00 EDT 2009},
month = {Wed Apr 15 00:00:00 EDT 2009}
}