Journal
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
Volume 86, Issue B1, Pages 31-36Publisher
ELSEVIER
DOI: 10.1016/j.psep.2007.10.010
Keywords
SO2 adsorption; CO2 adsorption; pumice; flue gases
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The sorption capacity of pumice has been investigated for the removal Of SO2 from binary and tertiary mixtures with N-2 and N-2 + CO2, respectively. The influence of the presence of water on the adsorption Of SO2 has also been analyzed by moisturizing the adsorbent at different levels within the limits of applicability of Henry's law. SO2 adsorption capacity of dry pumice was found as 16.26 mg SO2 g(-1) pumice while for adsorption on moisturized pumice (22 wt% moisture) it was 33.4 mg SO2 g(-1) pumice at 293 +/- 2 K. When co-adsorption Of CO2 and SO2 was carried Out SO2 adsorption on dry pumice was slightly reduced, but this counter effect Of CO2 was gradually removed by increasing water content of the adsorbent. Moreover, the acidic character of the adsorption products reduced the durability of pumice when it was moisturized. (C) 2007 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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