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Simultaneous Removal of Particulates and NOx Using Catalyst Impregnated Fibrous Ceramic Filters.

DE2005836412

Publication Date	2004
Page Count	14
Abstract	The research is focused on the development and commercialization of high efficiency, cost effective air pollution control system, which can replace in part air pollution control devices currently in use. In many industrial processes, hot exhaust gases are cooled down to recover heat and to remove air pollutants in exhaust gases. Conventional air pollution control devices such as bag filters, E.P. and adsorption towers withstand operating temperatures up to 300 C. Also, reheating is sometimes necessary to meet temperature windows for S.C.R. Since Oxidation reactions of acid gases such as SO(sub 2), and HCl with lime are enhanced at high temperatures, catalyst impregnated ceramic filters can be candidate for efficient and cost effective air pollution control devices. As shown on Fig. 1., catalytic ceramic filters remove particulates on exterior surface of filters and acid gases are oxidized to salts reacting with limes injected in upstream ducts. Oxidation reactions are enhanced in the cake formed on exterior of filters. Finally, injected reducing gas such as NH(sub 3) react with NOx to form N(sub 2) and H(sub 2)O interior of filters in particulate-free environment. Operation and maintenance technology is similar to conventional bag filters except that systems are exposed to relatively high temperatures ranging 300-500 C.
Keywords	Nitrous oxides Particulates Ceramic filters Air pollution control Adsorption Catalysts Cleaning Commercialization Ducts Efficiency Exhaust gases Maintenance Oxidation Pollutants Removal
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Ajou Univ., Suwon, (Republic of Korea), School of Environmental and Urban Engineering.; Department of Energy, Washington, DC.; Myoungji Univ., Yongin, (Repubic of Korea). Division of Ceramic and
Supplemental Notes	Prepared in cooperation with Myoungji Univ., Yongin, (Repubic of Korea). Division of Ceramic and Chemical. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200518

Simultaneous Removal of Particulates and NOx Using Catalyst Impregnated Fibrous Ceramic Filters.

Simultaneous Removal of Particulates and NOx Using Catalyst Impregnated Fibrous Ceramic Filters.
DE2005836412

Publication Date	2004
Page Count	14
Abstract	The research is focused on the development and commercialization of high efficiency, cost effective air pollution control system, which can replace in part air pollution control devices currently in use. In many industrial processes, hot exhaust gases are cooled down to recover heat and to remove air pollutants in exhaust gases. Conventional air pollution control devices such as bag filters, E.P. and adsorption towers withstand operating temperatures up to 300 C. Also, reheating is sometimes necessary to meet temperature windows for S.C.R. Since Oxidation reactions of acid gases such as SO(sub 2), and HCl with lime are enhanced at high temperatures, catalyst impregnated ceramic filters can be candidate for efficient and cost effective air pollution control devices. As shown on Fig. 1., catalytic ceramic filters remove particulates on exterior surface of filters and acid gases are oxidized to salts reacting with limes injected in upstream ducts. Oxidation reactions are enhanced in the cake formed on exterior of filters. Finally, injected reducing gas such as NH(sub 3) react with NOx to form N(sub 2) and H(sub 2)O interior of filters in particulate-free environment. Operation and maintenance technology is similar to conventional bag filters except that systems are exposed to relatively high temperatures ranging 300-500 C.
Keywords	Nitrous oxides Particulates Ceramic filters Air pollution control Adsorption Catalysts Cleaning Commercialization Ducts Efficiency Exhaust gases Maintenance Oxidation Pollutants Removal
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Ajou Univ., Suwon, (Republic of Korea), School of Environmental and Urban Engineering.; Department of Energy, Washington, DC.; Myoungji Univ., Yongin, (Repubic of Korea). Division of Ceramic and
Supplemental Notes	Prepared in cooperation with Myoungji Univ., Yongin, (Repubic of Korea). Division of Ceramic and Chemical. Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200518