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采用浸渍法制备Pd/CeO_2-ZrO_2-MnOx储氧材料催化剂,并运用扫描电镜和热重-差热技术对催化剂进行表征。考察了Pd/CeO_2-ZrO_2-MnO_x催化剂中MnO_x含量、催化剂用量以及催化剂添加位置对卷烟主流烟气中CO去除率的影响,并且初步探究了Pd/CeO_2-ZrO_2-MnO_x催化剂降低CO的催化机理。结果表明:(1)随着MnOx含量的增加,催化剂降低CO的能力逐步增加,最佳量为15%(wt,质量分数,下同);(2)催化剂用量对降低CO没有明显的影响,最终确定催化剂用量为30mg;(3)将1%Pd/CeO_2-ZrO_2(摩尔比1∶1)-MnOx(15%)的催化剂添加到烟支前端,CO的去除率最好,可以达到29.62%。
Pd / CeO_2-ZrO_2-MnOx oxygen storage materials were prepared by impregnation method. The catalysts were characterized by SEM and TG-DTA. The effects of MnOx content, catalyst dosage and catalyst addition position on CO removal in mainstream cigarette smoke were investigated, and the catalytic mechanism of Pd / CeO_2-ZrO_2-MnO_x catalyst for CO reduction was investigated. The results showed that: (1) With the increase of MnOx content, the ability of the catalyst to reduce CO gradually increased with the optimum amount of 15% (wt, mass fraction); (2) The catalyst dosage had no significant effect on reducing CO, (3) Adding 1% Pd / CeO 2 -ZrO 2 (molar ratio 1: 1) -MnOx (15%) catalyst to the front of the cigarette, the removal rate of CO is the best, which can reach 29.62% .