• 关键词：Mn-Zr-La-Ce催化剂  乙酸乙酯  高压放电  低温等离子体  协同作用

• 基金项目：浙江省自然科学基金项目（No.LY20E080003）

• 聂云妮
• 浙江工商大学环境科学与工程学院，杭州 310018

• 蔡伟建
• 浙江工商大学食品与生物工程学院，杭州 310018

• 李济吾
• 浙江工商大学环境科学与工程学院，杭州 310018

• 摘要：实验制备了新型Mn-Zr-La-Ce/Al₂O₃、Mn-Zr-Cu和Mn-Co-Ce 3种催化剂，利用SEM-EDS、XRD、BET、FT-IR、O₂-TPD进行表征分析，研究了高压放电协同催化剂对乙酸乙酯的降解因素影响规律（催化剂种类、初始浓度、含氧量和进气气量），通过对出口气体GC-MS等分析，探讨了高压放电协同催化降解乙酸乙酯的机理.结果表明，高压放电低温等离子体协同Mn-Zr-La-Ce催化剂对于乙酸乙酯的降解效果最好，当电压为40 kV时，降解效率为94.6%，能量效率为1.52 g·kW^-1·h^-1，降解副产物O₃及NO_x浓度较低.降解效率随着初始浓度、气量的增加而较低，但随着含氧量的增加则是先升高后下降.GC-MS等分析结果表明，在降解乙酸乙酯过程中会产生丙酸乙酯和乙酸正已酯等中间产物，最终生成CO₂、H₂O.

• Abstract：Three catalysts， Mn-Zr-La-Ce/Al₂O₃， Mn-Zr-Cu and Mn-Co-Ce， were prepared and characterized by SEM-EDS， XRD， BET， FT-IR， and O₂-TPD. The influencing factors （such as catalyst species， initial concentration， oxygen content， and intake air volume） on the degradation efficiency of ethyl acetate by the high-voltage discharge were studied， and the degradation mechanism was investigated by GC-MS analysis of outlet gas. The results show that the high-voltage discharge plasma with Mn-Zr-La-Ce has the best degradation efficiency on ethyl acetate. When the supply voltage is 40 kV， the degradation efficiency is 94.6%， and the energy efficiency is 1.52 g·kW^-1·h^-1， with low concentration of by-product ozone and nitrogen oxides. The degradation efficiency decreases with the increasing of the initial concentration and intake air volume. But with the increasing of oxygen content， the degradation efficiency rises first and then decreases. The results of GC-MS analysis show that intermediates， such as ethyl propionate and n-hexyl acetate， are produced， and finally CO₂ and H₂O are generated.

• Key words：Mn-Zr-La-Ce catalyst  ethyl acetate  high-voltage discharge  non-thermal plasma  synergy

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