Zirconium Hydroxide as a Reactive Substrate for the Removal of Sulfur Dioxide

Zirconium hydroxide [Zr(OH)4], with a surface area of 365 m2/g, was evaluated for its ability to remove SO2 from streams of air at room temperature. The SO2 removal capacity of Zr(OH)4 was ∼90 mg SO2 removed per cm3 bed volume, which is almost an order of magnitude greater than the value achieved fo...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2009-02, Vol.48 (4), p.1694-1698
Main Authors: Peterson, Gregory W, Karwacki, Christopher J, Feaver, William B, Rossin, Joseph A
Format: Article
Language:English
Subjects:
Applied Chemistry
Applied sciences
Chemical engineering
Exact sciences and technology
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Summary:Zirconium hydroxide [Zr(OH)4], with a surface area of 365 m2/g, was evaluated for its ability to remove SO2 from streams of air at room temperature. The SO2 removal capacity of Zr(OH)4 was ∼90 mg SO2 removed per cm3 bed volume, which is almost an order of magnitude greater than the value achieved for activated carbon and is more than twice the value achieved for activated carbon impregnated with 10% CuO. Temperature-programmed desorption results indicate that SO2 is strongly retained by Zr(OH)4. X-ray photoelectron spectroscopy results reveals the presence of sulfite (SO3 2−) species following reaction exposure, which suggests the formation of zirconium sulfite. Although the SO2 removal capacity (volume basis) of Zr(OH)4 is high, relative to that of impregnated activated carbon, only 10% of the stoichiometric hydroxyl groups are able to contribute to the removal of SO2.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie801403h