Effect of water vapor from power station flue gas on CO2 capture by vacuum swing adsorption with activated carbon

doi:10.1016/S1872-5813(11)60016-9

Journal of Fuel Chemistry and Technology

Volume 39, Issue 3, March 2011, Pages 169-174

https://doi.org/10.1016/S1872-5813(11)60016-9 Get rights and content

Abstract

Due to the high absolute humidity of real flue gas, activated carbon, a hydrophobic adsorbent, was used to selectively adsorb CO₂ by vacuum swing adsorption in this study. The objective of this work is to study the feasibility and advantage of CO₂ capture along with simultaneous moisture removal by activated carbon and the effect of H₂O on CO₂ capture from wet flue gas streams. Through experiment and analysis, the “S” shape isotherms of water indicated water was easier to be desorbed from activated carbon. Then a cone shape model was proposed to depict water distribution inside the adsorption bed. As a consequence, water vapor hardly influenced the CO₂ capture performance. Moreover, the process can be operated under a relatively high vacuum pressure and short evacuation time. The preliminary results showed that our one-bed VSA process could yield a good CO₂ recovery of over 80% and a reasonable purity of 43%.

References (23)

S Sircar et al.
Activated carbon for gas separation and storage
Carbon
(1996)
J Zhang et al.
Effect of process parameters on power requirements of vacuum swing adsorption technology for CO₂ capture from flue gas
Energy Convers Manage
(2008)
G Li et al.
Competition of CO₂/H₂O in adsorption based CO₂ capture
Energy Procedia
(2009)
H Ahn et al.
Effects of capillary condensation on adsorption and thermal desorption dynamics of water in zeolite 13X and layered beds
Chem Eng Sci
(2004)
J Zhang et al.
Effect of flue gas impurities on CO₂ capture performance from flue gas at coal-fired power stations by vacuum swing adsorption
Energy Procedia
(2009)
DF Jose et al.
Advances in CO₂ capture technology-The U.S. Department of Energy's Carbon Sequestration Program
J Greenhouse Gas control
(2008)
A Meisen et al.
Research and development issues in CO₂ capture
Energy Convers Manage
(1997)
Gielen D. The future role of CO2 capture and major point sources. OECD/IEA report, Paris,...
S Anderson et al.
Prospects for carbon capture and storage technologies
Annu Rev Environ Res
(2004)
WY Fei et al.
Capture and separation of greenhouse gas-challenge and change faced by separation technology
Chemical Endustry and Engineering Process
(2005)

VG Gomes et al.

Pressure swing adsorption for carbon dioxide sequestration from exhaust gases

Sep Purif Technol

(2002)

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Citation Excerpt :
To understand this, AC was used to selectively adsorb CO2 from flue gas with high absolute humidity using VSA with the simultaneous removal of water. A cone shaped model was proposed to depict the water distribution inside the adsorption bed under different humidities, which indicates that the presence of water vapor hardly affects the CO2 capture performance [118]. A similar observation was also made by Chiang et al., who noted minimal effect on water on CO2 adsorption capacity while working with KOH activated and TEPA aminated microporous AC fibers [119].
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: Foundation item: Supported by the National Natural Science Foundation of China (51074205) and Corporate Research Centre for Greenhouse Gas Technology Foundation in Australia.

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RESEARCH PAPEREffect of water vapor from power station flue gas on CO2 capture by vacuum swing adsorption with activated carbon

Abstract

Carbon

Energy Convers Manage

Energy Procedia

Chem Eng Sci

Energy Procedia

Advances in CO2 capture technology-The U.S. Department of Energy's Carbon Sequestration Program

J Greenhouse Gas control

Research and development issues in CO2 capture

Energy Convers Manage

Prospects for carbon capture and storage technologies

Annu Rev Environ Res

Capture and separation of greenhouse gas-challenge and change faced by separation technology

Chemical Endustry and Engineering Process

Pressure swing adsorption for carbon dioxide sequestration from exhaust gases

Sep Purif Technol

RESEARCH PAPER
Effect of water vapor from power station flue gas on CO₂ capture by vacuum swing adsorption with activated carbon

Advances in CO₂ capture technology-The U.S. Department of Energy's Carbon Sequestration Program

Research and development issues in CO₂ capture