脉冲电晕低温等离子体协同负载型催化剂降解乙硫醇

Degradation of ethyl mercaptan by pulsed corona non-thermal plasma combined with supported catalyst

采用共沉淀—喷涂法制备了3种负载型催化剂用于协同脉冲电晕低温等离子体降解乙硫醇,采用SEM、TEM、XRD及XPS对其进行了表征,并以污染物降解率和矿化率、能量效率、催化剂工作温度和失活等为评价指标,筛选出最佳催化剂。表征结果显示,负载活性组分后的(γ-Al_(2)O_(3))0.1/堇青石蜂窝陶瓷粒径更小、孔隙率更高、分布更加均匀。实验结果表明,脉冲电晕等离子体协同Pd_(0.001)/(Ce_(4)La_(1)O_(9.5))_(0.03)/(Cu_(5)Mn_(7)Zr_(1)O_(22))0.08/(γ-Al_(2)O_(3))_(0.1)/堇青石蜂窝陶瓷催化剂降解乙硫醇具有高降解率、高矿化率、高能量利用率以及低有害副产物生成率等优势,同时更低的催化剂工作温度和长时间保持较高催化活性均有利于降低系统能耗和运行成本。

Three kinds of supported catalysts for ethyl mercaptan degradation combined with pulse corona low temperature plasma were prepared by coprecipitation and spraying method,and were characterized by SEM,TEM,XRD,and XPS.Taking pollutant degradation rate,pollutant mineralization rate,energy efficiency,catalytic working temperature and catalyst deactivation as the evaluation indexes,the best supported catalyst was selected.The characterization results show that the active components loaded(γ-Al_(2)O_(3))0.1/cordierite honeycomb ceramic carrier tends to have smaller particle size,higher porosity and more uniform distribution.The experimental results show that the degradation of ethyl mercaptan by pulsed corona plasma combined with Pd_(0.001)/(Ce_(4)La_(1)O_(9.5))_(0.03)/(Cu_(5)Mn_(7)Zr_(1)O_(22))0.08/(γ-Al_(2)O_(3))_(0.1)/cordierite honeycomb ceramic catalyst has the advantages of high degradation rate,high mineralization rate,high energy utilization efficiency and low generation rate of harmful by-products,and lower catalyst working temperature and higher catalytic activity for a long time are conducive to reducing system energy consumption and operation cost.