Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma

CHEN Ke; YU Yajing; FAN Zhiming; CHEN Jiayue; ZHAO Kun; CUI Shaoping; WANG Lemeng; ZHANG Pan

doi:10.12434/j.issn.2097-2547.20240005

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Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma

- Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma
- Vol. 49, Issue 12, Pages: 79-85(2024)
- 作者机构：
  
  1.华北电力大学（保定）环境科学与工程系，河北保定 071003
  2.华北电力大学（保定）河北省燃煤电站烟气多污染物协同控制重点实验室，河北保定 071003
  3.交通运输部天津水运工程科学研究院，天津 300456
- 作者简介：
- 基金信息：
- DOI：10.12434/j.issn.2097-2547.20240005
  CLC： TQ426;X511
- Published：25 December 2024，
  
  Received：03 January 2024，
  
  Revised：31 January 2024，
- 稿件说明：
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陈科,余雅静,范芝铭等.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.

CHEN Ke,YU Yajing,FAN Zhiming,et al.Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):79-85.
陈科,余雅静,范芝铭等.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. DOI： 10.12434/j.issn.2097-2547.20240005.

CHEN Ke,YU Yajing,FAN Zhiming,et al.Efficient synergistic catalytic oxidation of NO by nano Co-Ce catalysts and low-temperature plasma[J].Low-carbon Chemistry and Chemical Engineering,2024,49(12):79-85. DOI： 10.12434/j.issn.2097-2547.20240005.

摘要

在烟气氮氧化物的脱除方面，纳米催化剂协同低温等离子体（NTP）催化氧化NO受到了广泛关注。采用水热法合成纳米Co-Ce 催化剂（Co-CeO

），探究了催化剂与介质阻挡放电（DBD）协同催化氧化NO的效率，并考察了催化剂的抗硫抗水性。结果表明，Co-CeO

与DBD协同可实现NO高效氧化，主要催化产物为NO

。当电压为19~23 kV时，NO转化率可达100%；当电压高于23 kV时，NO转化率随之降低。在模拟烟气中引入SO

（400 × 10

-6

，体积分数）时，催化剂表现出良好的抗硫性；而引入H

O（5%，体积分数）时，催化剂表现出较弱的抗水性。催化剂表征结果表明，反应前后催化剂晶体结构没有明显变化，说明催化剂具有较好的稳定性。催化剂中Co与Ce的协同效应使催化剂具有较高的表面活性氧和氧迁移率。最后，结合实验和表征结果推测了Co-CeO

催化剂协同低温等离子体高效催化氧化NO的反应路径。

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-CeO

) 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-CeO

catalysts and DBD can achieve efficient oxidation of NO

with NO

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 SO

(400 × 10

-6

volume fraction)

the catalysts exhibit excellent sulfur resistance property. When H

O (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-CeO

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

Keywords

catalystNO oxidationdielectric barrier dischargesynergistic catalysis

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Related Institution

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