Wet scrubbing process with oxidation and reduction in series for removal of SO2 and NO from marine diesel engine exhaust
نویسندگان
چکیده
A novel wet scrubber comprising of an oxidation and a reducing section in series was used for the removal SO2 NOx from simulated ship emissions. Sodium chlorite (NaClO2) sodium thiosulfate (Na2S2O3) were oxidizing sections, respectively. Results showed that although increasing pH oxidant led to less NO being oxidised, lower rates achieved both soluble nitrogen formation (chiefly form nitrates) reactant consumption per mole pollutant removed. On reduction side, it shown more well-known sulfite (Na2SO3) about 15% efficient removing NO2 compared thiosulfate, latter had very low rate, 118 27 times with formaldehyde-stabilised sulfite. The also thiosulfates (less than 0.18 mols formed removed) or between 1.6 1.8 when sulfites, as most reduced harmless N2. Although sulfur precipitates during reaction, this could be circumvented by operating at high pH. certain percentage washwater scrubbers can discharged, mixing sections adjustment potential, within allowable nitrate limits.
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ژورنال
عنوان ژورنال: Chemical Engineering Journal
سال: 2023
ISSN: ['1873-3212', '1385-8947']
DOI: https://doi.org/10.1016/j.cej.2023.142299