低碳化学与化工2024，Vol.49Issue(12)：79-85,7.DOI:10.12434/j.issn.2097-2547.20240005
纳米Co-Ce催化剂协同低温等离子体高效催化氧化NO
Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma
摘要
Abstract
The synergistic catalytic oxidation of NO by nano catalysts and low-temperature plasma(NTP)has received widespread attention in the removal of nitrogen oxides from flue gas.Nano Co-Ce catalysts(Co-CeOx)were synthesized by the hydrothermal method,and their synergistic catalytic efficiency with dielectric barrier discharge(DBD)for NO oxidation was investigated.The sulfur and water resistance properties of the catalysts were also investigated.The results indicate that the synergistic effect of nano Co-CeOx catalysts and DBD can achieve efficient oxidation of NO,with NO2 as the main catalytic product.When the voltage is 19 kV to 23 kV,the conversion rate of NO can reach 100%.When the voltage is above 23 kV,the NO conversion rate decreases as the voltage increases.In addition,with the introduction of SO2(400×10-6,volume fraction),the catalysts exhibit excellent sulfur resistance property.When H2O(5%,volume fraction)is introduced,the water resistance property of the catalysts is relatively weak.The characterization results of the catalyst indicate that there is no significant change in the crystal structure of the catalysts before and after the reaction,indicating that the catalysts have good stability.The synergistic effect between Co and Ce in the catalysts results in a higher surface active oxygen and oxygen migration rate.Finally,based on experimental phenomena and spectral characterization,the reaction pathway of synergistic efficient catalytic oxidation of NO by Co-CeOx catalysts and low-temperature plasma was inferred.关键词
催化剂/NO氧化/介质阻挡放电/协同催化Key words
catalyst/NO oxidation/dielectric barrier discharge/synergistic catalysis分类
化学化工引用本文复制引用
陈科,余雅静,范芝铭,陈嘉悦,赵昆,崔少平,王乐萌,张盼..纳米Co-Ce催化剂协同低温等离子体高效催化氧化NO[J].低碳化学与化工,2024,49(12):79-85,7.基金项目
国家自然科学基金青年科学基金(52106009) （52106009）
河北省自然科学基金面上项目(E2021502024) （E2021502024）
华北电力大学环境科学与工程学院资源与环境系统优化教育部重点实验室开放课题(KLRE-KF202309). （KLRE-KF202309）
