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研究报告

李东,唐晓龙,易红宏,马玎,高凤雨.富氧条件下等离子体协同改性NaY分子筛催化分解NO_x 研究[J].环境科学学报,2015,35(12):4088-4094

NO_x decomposition over modified NaY zeolite by dielectric barrier discharge plasma in the presence of excess oxygen

基金项目：新世纪优秀人才支持计划(No.NECT-13-0667);中央高校基本科研业务费专项资金(No.06101047);首都蓝天行动培育专项课题(No.Z141100001014006)

摘要：用不同浓度的Cu、Ce和La离子交换NaY分子筛,对比了不同改性条件下等离子体协同分解NO_x的性能.实验结果表明:Cu是NO_x催化分解的主要活性组分,对于8%Cu-NaY催化剂,当放电电压为10 kV,放电功率为7.6 W时,NO_x转化率可达46.3%,反应产物中没有NO₂,只有11 ppm的N₂O.Ce的加入可以有效提高催化剂催化活性,对于5%Ce-8%Cu-NaY催化剂,当放电电压为7.8 kV,功率为3.6 W时,NO_x转化率可达67.3%.La的加入同样可以使催化剂活性上升,但不同La含量催化剂的NO_x转化率相差较小.

Abstract：NaYzeolite was modified by different amount of Cu, Ce and La via ion exchange. NO_x removal efficiency on modified NaY zeolites in the system of dielectric barrier discharge plasma assisted catalytic decomposition with the presence of excess oxygen were investigated. Results show that Cu is the main active component for NO_x decomposition. When the discharge voltage was 10 kV and the discharge power was 7.6 W, NO conversion rate on 8% Cu-NaY was 46.3%. No NO₂ was detected and only 11 ppm N₂O was produced. Ce can improve the catalytic activity of Cu-NaY effectively. When the discharge voltage was 7.8 kV and the discharge power was 3.6 W, NO_x conversion rate on 5%Ce-8%Cu-NaY was 67.3%. La can also increase the catalytic activity, but NO_x conversion rate on different amount of Lamodified Cu-NaY catalyst was very similar.