Selection of metal oxides in the preparation of rice husk ash (RHA)/CaO sorbent for simultaneous SO@d2 and NO removal

In this work, the removal of SO@d2 and NO from simulated flue gas from combustion process was investigated in a fixed-bed reactor using rice husk ash (RHA)/CaO-based sorbent. Various metal precursors were used in order to select the best metal impregnated over RHA /CaO sorbents. The results showed t...

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Published inJournal of hazardous materials Vol. 166; no. 2-3; pp. 1556 - 1559
Main Authors Dahlan, I, Lee, K T, Kamaruddin, A H, Mohamed, A R
Format Journal Article
LanguageEnglish
Published 30.07.2009
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Summary:In this work, the removal of SO@d2 and NO from simulated flue gas from combustion process was investigated in a fixed-bed reactor using rice husk ash (RHA)/CaO-based sorbent. Various metal precursors were used in order to select the best metal impregnated over RHA /CaO sorbents. The results showed that RHA/CaO sorbents impregnated with CeO@d2 had the highest sorption capacity among other impregnated metal oxides for the simultaneous removal of SO@d2 and NO. Infrared spectroscopic results indicated the formation of both sulfate (SO@d4@u2@u-) and nitrate (NO@d3@u-) species due to the catalytic role played by CeO@d2. Apart from that, the catalytic activity of the RHA/CaO/CeO@d2 sorbent was found to be closely related to its physical properties (specific surface area, total pore volume and average pore diameter).
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ISSN:0304-3894
DOI:10.1016/j.jhazmat.2008.12.028