Onsite CO2 Capture from Flue Gas by an Adsorption Process in a Coal-Fired Power Plant

The feasibility and efficiency of adsorption technology were evaluated experimentally and theoretically for CO2 capture from the flue gas in an existing coal-fired power plant, where a three-bed VPSA unit was set up to test 282 kg of adsorbent materials. In this work, the experimental results are re...

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Bibliographic Details
Published inIndustrial & engineering chemistry research Vol. 51; no. 21; pp. 7355 - 7363
Main Authors Liu, Zhen, Wang, Lu, Kong, Xiangming, Li, Ping, Yu, Jianguo, Rodrigues, Alirio E
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 30.05.2012
Subjects
Adsorption
Applied sciences
Atmospheric pollution
Chemical engineering
Exact sciences and technology
General processes of purification and dust removal
Pollution
Prevention and purification methods
Gaseous effluent
Coal power plant
Adsorption
Carbon dioxide
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Summary:The feasibility and efficiency of adsorption technology were evaluated experimentally and theoretically for CO2 capture from the flue gas in an existing coal-fired power plant, where a three-bed VPSA unit was set up to test 282 kg of adsorbent materials. In this work, the experimental results are reported for zeolite 5A as the adsorbent. The composition of the flue gas after dehydration was 15.0 vol % CO2, 76.5 vol % N2, and 8.5 vol % O2. With a three-bed seven-step VPSA process including rinse and pressure equalization steps, 85% CO2 was obtained with recovery of 79% from flue gas at a feed flow rate of 46.0 Nm3/h. The experimentally measured energy consumption was 2.37 MJ/(kg of CO2). The experimental work was compared with numerical simulations through the multibed VPSA modeling framework developed in a previous work. The simulated results were found to agree well with the experimental results.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie3005308