NO_x在固体电解质电解池上的电化学消除  

Electrochemical Removal of NO_x by Solid Electrolyte Cells

作　　者：赵沁[1] 王新平[1] 蔡天锡[1] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,辽宁大连116012

出　　处：《催化学报》2002年第6期575-579,共5页

基　　金：国家自然科学基金资助项目 (2 99770 0 4)

摘　　要：综述了近年来利用固体电解质电解池消除NO的研究进展 .重点总结了电化学消除NO研究体系、电化学消除NO分解机制、O2 -在固体电解质电解池中传导的控速步骤、电极种类和形态对NO分解性能的影响以及直流与交流电作用的差异等几个方面的研究结果 .在RuO2 ︱Ag︱YSZ︱Pd电解池上实现的NO选择性分解是迄今为止的最佳结果 ,5 0 0℃下NO的转化率为 31 8% ,NO的分解活性是O2 的分解活性的 13倍 .该领域今后研究的主要方向是 ,进一步提高NO分解相对于共存O2 离子化的选择性、降低O2 -在阴极界面处的传导阻力和探寻可在更低温度传导O2 -的新的固体电解质 .A new electrochemical method to remove NOx in exhaust gas let off from lean-burn engine by solid electrolyte cell was introduced and the recent development in this field was reviewed comprehensively. The process and mechanism of electrochemical removal of NO, the rate-determining step of O-2 transport in the solid electrolyte cell, the effect of electrode on NO decomposition and the difference of NO decomposition by AC and DC voltage were summarized with emphasis. So far, the best result was obtained on the RuO2 \ Ag \ YSZ \ Pd cell, the NO conversion reached 31.8% at 500 degreesC and the selectivity of NO decomposition was about 13 times as that of O-2 ionization. Further investigation in this field should focus on improving the selectivity of NO decomposition with respect to O-2 ionization and on decreasing the resistance of O-2 transport on the cathode/electrolyte interface, and then discovering a proper electrolyte to transport O(2-)at lower temperature.

关 键 词：固体电解质电解池 氧化氮 分解 电化学 脱氮 

分 类 号：O646[理学—物理化学]