锰离子催化臭氧液相烟气脱硫实验研究

对Mn2+催化臭氧(O3)液相氧化脱除二氧化硫(SO2)进行了实验研究,以揭示Mn2+对臭氧液相氧化SO2的影响.采用标准碘量法测定了O3浓度曲线.实验比较了添加Mn2+前后吸收液对SO2的脱除效率,并研究了O3与SO2摩尔比([O3]/[SO2])、Mn2+浓度对SO2脱除效率的影响.在[O3]/[SO2]=0.5、未添加Mn2+时O3对SO2的氧化效率为35%,而添加Mn2+后的氧化效率达到70%.随着[O3]/[SO2]的增大,SO2脱除效率逐渐增加,而且脱除效率也随Mn2+浓度的增加而增加,合适的Mn2+浓度范围为1.2×10-2~1.2×10-1mol/L.

Experiment Study on the Aqueous Removal of SO2 by Mn2+ Catalytic Ozonation

The removal of SO_2 by Mn~(2+) catalytic aqueous ozonation was investigated by experiment, so as to find the effects of Mn~(2+) for aqueous removal of SO_2 by ozonation. The concentration curve of ozone was drawn by standard iodine method. The operating factors included mole ratio of ozone to sulfur dioxide and concentration of Mn~(2+) . When absorption solution has no Mn~(2+) , the removal efficiency of SO_2 was 35% at [O_3] / [SO_2] =0.5, but the efficiency was 70 % when Mn~(2+) was put into absorption solution at the same value of [O_3] / [SO_2]. With the increasing of [O_3] / [SO_2], the removal efficiency of SO_2 increases. And as concentration of Mn~(2+) increases, the efficiency also increases. There is an appropriate concentration range which is 1.2×10 -1.2×10~(-1) mol/L for Mn~(2+) .