Catalytic oxidation of calcium bisulfite in the wet limestone–gypsum flue gas desulfurization process

详细信息    查看全文

• 作者：Lancia ; Amedeo ; Musmarra ; Dino ; Prisciandaro ; Marina ; Tammaro ; Marco
• 关键词：Calcium bisulfite ; Oxidation ; Flue gas ; Desulfurization ; Reaction regimes ; Manganous sulfate
• 刊名：Chemical Engineering Science
• 出版年：1999
• 出版时间：July, 1999
• 年：1999
• 卷：54
• 期：15-16
• 页码：3019-3026
• 全文大小：152 K

文摘

A study on the oxidation of calcium sulfite catalyzed by Mn²⁺ is presented in this paper. A laboratory-scale well-mixed thermostated reactor was used, with continuous feeding of both gas and liquid phase. The gas phase was a mixture of oxygen and nitrogen, with O₂ partial pressure varying from 5.1 to 40.5 kPa. The liquid phase was obtained by mixing inside the reactor two separate aqueous solutions, one obtained by dissolving Ca(OH)₂ into a SO₂ solution, and the other one containing manganous sulfate. The temperature was kept constant in all the experiments at 45°C. The results show that increasing catalyst concentration, the transition takes place from slow kinetic to slow diffusional and eventually to fast reaction regime.