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Study on the Denitrification and Combustion Mechanism Catalysis by Nano-TiO2

Author: KongHuanYun
Tutor: WangShuQin
School: North China Electric Power University (Hebei)
Course: Environmental Engineering
Keywords: nano-TiO2 catalytic burning denitrification reaction mechani
CLC: X701
Type: Master's thesis
Year: 2009
Downloads: 95
Quote: 0
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Abstract


NOx is one of the main pollutants during coal combustion. It cannot only cause the corrosion of the equipment, but also can cause the acid dust and acid rain. Using nano-TiO2 as the catalyst to desulfurization and denitrification also could make the burning completely. In the condition of desulfurization by CaO or non CaO, it discussed the efficiency of denitrification by nano-TiO2 in the process of coal burning. The following conclusions were: the desulfurization and denitrification efficiencies reached 87.8% and 36% when the additive of nano-TiO2 was 8%, the optimum molar ratio of Ca to N was 1.22, the burning temperature was 850℃and the flux of oxygen reached 40 ml/min. The flue gas was analyzed by the Flue Gas Analysis and Ion Chromatography(IC), the specific surface area of coal char was analyzed. The combustion catalysis mechanism of nano-TiO2 includes homophase reduction and heterogeneous reduction. Nano-TiO2 is helpful to the conversion of NOx to N2 by analyzing the conversion of NO redacted by coal char.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Exhaust gas processing and utilization
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