Sol-gel-derived alumina-supported copper oxide sorbent for flue gas desulfurization
- Univ. of Cincinnati, OH (United States). Dept. of Chemical Engineering
Nanostructured mesoporous CuO/{gamma}-Al{sub 2}O{sub 3} granular sorbents were prepared by the sol-gel method. Performance of the sol-gel-derived CuO/{gamma}-Al{sub 2}O{sub 3} sorbents for SO{sub 2} removal was studied in a fixed-bed adsorption system. SO{sub 2} breakthrough curves with a feed stream of air containing 2000 ppm SO{sub 2} were measured at different temperatures (300--500 C) and flow rates (interstitial velocity of 0.25--6.96 cm/s). The optimum sulfation and regeneration temperature on the sol-gel-derived sorbent was found to be 400 C. The properties of the sol-gel-derived sorbents are compared with a similar sorbent from a commercial source used in the pilot-scale copper oxide flue gas desulfurization process. At high temperatures (>400 C) the sol-gel-derived CuO sorbents exhibit catalytic properties for converting SO{sub 2} to SO{sub 3}. The crush strength of the sol-gel-derived sorbents is about 5 times that of the commercial sample, while the attrition rate of the former is about 4--10 times smaller than the latter. The SO{sub 2} sorption capacity of the sol-gel-derived sorbent is about 3 times that of the commercial sorbent with a similar amount of CuO loading. The better mechanical properties and higher sulfation capacity of the sol-gel-derived alumina-supported copper oxide sorbents are due to their unique microstructure and the method used for coating CuO. The sulfation and regeneration study shows good regenerability and stability of the sol-gel-derived CuO/{gamma}-Al{sub 2}O{sub 3} sorbents.
- OSTI ID:
- 321080
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 12 Vol. 37; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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