LiCo_(0.9)O_2协同低温等离子体技术净化PM和NO_x

Purification of PM and NO_x using LiCo_(0.9)O_2 catalyst and non-thermal plasma coordination

用溶液燃烧法制备出铜铁矿型催化剂LiCo0.9O2,用于净化柴油机排气污染物.通过小样实验研究了催化剂助剂以及催化剂二次涂覆对净化效果的影响,并结合NTP研究了等离子体对催化剂活性的影响.结果表明:TiO2,La2O3和CeO2三种氧化物助剂的加入能够使NOx的最大转化率提高到17.6%;催化剂的二次涂覆能够使净化效率略有提高,NOx的最大转化率达到17.8%;NTP的加入能够显著提高催化剂的净化效率,其中在30kV电压和50Hz频率下,NTP前置能够使NOx的最大转化率达到25.0%.

By using solution combustion synthesis method,delafossite catalyst LiCo0.9 O2 were pre-pared to purify the diesel engine pollutants.By small sample experiment,the effect of catalyst addi-tives,multiple coating,and the NTP coordination on the purification of PM and NOx were analyzed. It is indicated that the addition of TiO2 ,La2 O3 ,and CeO2 as catalyst additives can improve the con-version ratio of NOx to 17.6%.Multiple coating of the catalyst can improve the conversion ratio of NOx to 17.8%.NTP coordination can significantly improve the purification effect of diesel engine PM and NOx.Under the condition of 30 kV and 50 Hz,combining the prepositive plasma with the catalyst LiCo0.9 O2 ,the purification rate of NOx can reach 25.0%.