环境工程学报2017，Vol.11Issue(12)：6332-6338,7.DOI:10.12030/j.cjee.201702031
烟气脱硫中亚硫酸钙铁锰复合催化氧化优化
Optimization for Fe-Mn catalyzed sulfite oxidation in flue gas desulfurization
摘要
Abstract
Oxidation of calcium sulfite is a very important part of wet limestone/gypsum flue gas desulfurization (FGD) process.Optimization of the oxidation process will help reduce energy consumption and cost.We studied standard oxidation rate (SOR) of calcium sulfite by Fe catalyst,Mn catalyst and Fe/Mn combined catalyst.Sin gle factor analysis and response surface methodology were employed to study separate and joint effects of pH,Fe/Mn ratio and initial CaSO3 concentration (ICS) on SOR.The results showed that combined catalyst resulted in a higher SOR than only Fe or Mn.ICS had the most impact on SOR,followed by pH and Fe/Mn ratio.Fe/Mn ratio and ICS had the most significant interaction.Optimum conditions for CaSO3 oxidation were:pH of 4.5,Fe/Mn ratio of 0.37 and ICS of 17.83 mmol · L-1.Under the optimum conditions,SOR reached 4.22 mmol · (L· min)-1.The results from structural analysis indicated that the (020),(021) and (041) faces of the product CaSO4 · 2H2O were first formed in the oxidation process.关键词
烟气脱硫/亚硫酸钙氧化/响应面/结构表征Key words
flue gas desulfurization/calcium sulfite oxidation/response surface/structural analysis分类
资源环境引用本文复制引用
蒋路漫,周振,俞杰,胡大龙..烟气脱硫中亚硫酸钙铁锰复合催化氧化优化[J].环境工程学报,2017,11(12):6332-6338,7.基金项目
国家自然科学基金资助项目(51408352) （51408352）
