低温等离子体协同催化降解含硫恶臭污染物

采用共沉淀—喷涂法制备了（Cu5Mn7Zr1O22）0.08/（γ-Al2O3）0.1/堇青石蜂窝陶瓷催化剂。表征结果显示：催化剂孔隙率较高，表面均匀分散着粒径介于20~100 nm的晶体颗粒。以硫化氢和乙硫醇为典型含硫恶臭污染物进行了低温等离子体协同催化降解实验，结果表明：污染物的降解率随着输入功率的增加而提高；与单纯低温等离子体相比，低温等离子体协同催化能获得更好的降解效果。降解机理可能为：在高能电子和活性粒子作用下，H2S或C2H5SH分子中键能较弱的H—S、C—S和C—C键断裂形成·SH、·C2H5、·CH2SH、·CH3等小碎片基团，这些小碎片基团进一步发生聚合、氧化或自由基链式反应，最终降解为CO2、SO2、SO3、H2O等无毒小分子。

Degradation of sulfur-containing odor pollutants by non-thermal plasma assisted catalysis

The（Cu5Mn7Zr1O22）0.08/（γ-Al2O3）0.1/cordierite honeycomb ceramics catalyst was prepared by coprecipitation-spraying method. The characterization results indicated that the porosity of the catalyst was higher，and there were many crystal particles with particle size of 20-100 nm well-dispersed on the surface of the catalyst. The experiments for non-thermal plasma assisted catalytic degradation were carried out using H2S and C2H5SH as typical sulfur-containing odor pollutants and the results showed that：The degradation rates of pollutants were increased with the increasing of input power；The degradation effect by non-thermal plasma assisted catalysis was better than that by non-thermal plasma only. The mechanism of degradation was supposed as follows：By actions of high-energy electrons and active particles，the weak bonds in H2S or C2H5SH molecule such as H—S，C—S and C—C break and form ·SH，·C2H5，·CH2SH，·CH3 and other small fragment groups，and then the small fragment groups eventually degrade to non-toxic small molecule of SO2，SO3，CO2 and H2O by polymerization，oxidation or free radical chain reaction.