二氧化锰矿分解连二硫酸锰及动力学

Decomposition of manganous dithionate with natural MnO2 ore and kinetics study

氧化锰矿脱硫是一种新型大气污染控制协同硫资源化脱硫技术,但脱硫过程中除生成MnSO4外,还会生成副产物MnS2O6,影响脱硫浆液的资源化利用。本文以MnO2矿为原料,研究了脱硫锰浆中低浓度MnS2O6的强化分解过程,讨论了MnS2O6浓度、反应时间、反应温度、硫酸浓度和锰矿投加量等关键反应条件对MnS2O6分解的影响。并对MnO2矿强化氧化分解MnS2O6进行了动力学分析。结果表明:MnO2矿强化氧化分解MnS2O6的表观反应级数为2,反应活化能为74.8 kJ/mol,属于化学反应控制过程。

Manganese oxide desulfurization is a new desulfurization technology and coupled with the resource utilization of sulfur simultaneous.However,the desulfurization process has an inevitable byproduct,the manganese dithionate(MnS2O6),which affect the following resource utilization.In this study,the natural manganese oxide ore(δ-MnO2)strengthened low concentration MnS2O6 decomposition was carefully studied.The effects of operation conditions,including the original MnS2O6 concentration,reaction time,temperature,slurry acidity and manganese ore addition on decomposition of MnS2O6 were discussed,and the kinetics was also analyzed based on these results.The results show that the apparent reaction order of MnS2O6 with natural MnO2 ore is 2,and the activation energy is 74.8 kJ/mol,which is a typically chemical reaction control process.