A single catalyst of aqueous Co^III for deodorization of mixture odor gases: A development and reaction pathway study at electro-scrubbing process

다국어 초록 (Multilingual Abstract)

A constant generation of aqueous Co<SUP>III</SUP> active catalyst and its utility on various odor gases deodorization at electro-scrubbing process is the primary investigation. The Co<SUP>III</SUP> activation and regeneration for continuous use is established by electrochemical undivided cell in H<SUB>2</SUB>SO<SUB>4</SUB> medium. The generated aqueous Co<SUP>III</SUP> is then applied to simultaneous deodorization of simulated odor gases, namely, ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, and acetaldehyde, for municipal waste treatment plant emissions. The electro-scrubbing process results indicated that deodorization is almost complete at a low gas flow rate of 30Lmin<SUP>-1</SUP>. FTIR and pH studies demonstrated that amine compounds are removed via complex formation with H<SUB>2</SUB>SO<SUB>4</SUB> and Co<SUP>III</SUP>. In the case of sulfur compounds, deodorization of methyl mercaptan and hydrogen sulfide are removed by the Co<SUP>III</SUP>-MEO (Co<SUP>III</SUP>-mediated electrocatalytic oxidation) process via the formation of acetic acid as intermediate and SO<SUB>4</SUB><SUP>2-</SUP> as a product. Also, acetaldehyde deodorization results obtained by pH, total acidity and CO<SUB>2</SUB> analyses evidence the process follow Co<SUP>III</SUP>-MEO. The constant generation of aqueous active Co<SUP>III</SUP> and an electro-scrubbing process offers promise as a means of removing odorous waste gases from gaseous emissions.