Abstract:In order to solve the disadvantage of high investment and operating costs, and large occupied area in conventional technology of simultaneous flue gas desulfurization and denitrification, reactive oxygen species (O2+ and O3) produced by a strong ionization dielectric barrier discharge were injected into the emission duct. In the plasma reaction duct, O2+ and O3 oxidized NO to HNO3, and SO2 to H2SO4. The principle for O2+ and O3 produced was discussed. The mechanisms for ·OH radical generated from O2+ reacting with H2O, and simultaneous flue gas desulfurization and denitrification by ·OH radicals were introduced. The composition of the recovered acid liquid was analyzed. Removal rates of 97.4% for NO, and 83.2 % for SO2 were obtained under the following optimal experimental conditions: the molar ratio of reactive oxygen species (O2+, O3) to SO2 and NO was five; the inlet flue gas temperature was 65 °C; the H2O volume fraction was 10%, and the reaction time was 1s.
白敏菂, 毛首蕾, 朱玉鹏, 李超群. O2+、O3同时脱硫脱硝实验[J]. 中国环境科学, 2014, 34(2): 324-330.
BAI Min-Di, MAO Shou-Lei, ZHU Yu-Peng, LI Chao-Qun. Simultaneous desulfurization and denitrification by O2+, O3. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(2): 324-330.