Evolution of ABS on the Surface of Vanadium-Titanium Catalyst and Its Influence on Catalytic Activity

HUANG Linbin; HE Lucan; CHEN Guoqing; TAN Rui; GAO Xinglong; ZHANG Haifeng; ZHANG Esong; YU Jie

doi:10.19805/j.cnki.jcspe.2025.240171

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Evolution of ABS on the Surface of Vanadium-Titanium Catalyst and Its Influence on Catalytic Activity

更新时间：2025-11-28

- Evolution of ABS on the Surface of Vanadium-Titanium Catalyst and Its Influence on Catalytic Activity
- Chinese Journal of Power Engineering Vol. 45, Issue 4, Pages: 619-625(2025)
- 作者机构：
  
  1. 国家能源集团科学技术研究院有限公司低碳智能燃煤发电与超净排放全国重点实验室,江苏,南京,210023
  2. 国能南京电力试验研究有限公司,江苏,南京,210023
  3. 国能常州第二发电有限公司,江苏,常州,213000
  4. 华中科技大学煤燃烧与低碳利用全国重点实验室,湖北,武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240171
  CLC： X773;O643.36
- Published Online：28 April 2025，
  
  Published：2025
- 稿件说明：
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黄林滨,何陆灿,陈国庆,谭锐,高行龙,张海峰,张萼松,于洁. 钒钛催化剂表面硫酸氢铵的演化及对催化活性的影响动力工程学报, 2025, 45(4): 619-625 https://doi.

org/10.19805/j.cnki.jcspe.2025.240171
黄林滨,何陆灿,陈国庆,谭锐,高行龙,张海峰,张萼松,于洁. 钒钛催化剂表面硫酸氢铵的演化及对催化活性的影响动力工程学报, 2025, 45(4): 619-625 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240171.

org/10.19805/j.cnki.jcspe.2025.240171 DOI：

摘要

探讨了钒钛催化剂表面硫酸氢铵(ABS)的演化特性及其对催化剂活性的影响。基于X射线衍射仪(XRD)、比表面积分析仪(BET)、傅里叶红外光谱分析仪(FTIR)和热重分析仪(TGA)等对催化剂负载ABS前后物理化学性质进行了表征

以期获得ABS对催化剂活性的影响;基于密度泛函理论(DFT)计算

对催化剂不同活性位点的作用机制进行了理论研究;对负载ABS的催化剂开展了脱硝台架实验研究。结果表明:ABS的沉积会导致催化剂比表面积降低;ABS含量低时

催化剂表面含硫基团主要以SO

形式存在;随着ABS含量增加

生成了HSO

官能团;催化剂中主要反应活性位是钒氧化物的Lewis酸位点

催化剂内部ABS分解生成的硫化物具有的Brnsted酸位点能够起到储存NH

的作用

对催化剂活性有一定的提升作用。负载ABS的催化剂在更高温下的脱硝活性更强

与DFT计算结果一致。从微观层面角度

微量ABS会提高催化剂活性。

Abstract

Evolution characteristics of ammonium bisulfate (ABS) on the surface of vanadium-titanium catalyst and its influence on catalytic activity were investigated. Physical and chemical properties of the catalyst before and after ABS loading were characterized to obtain the mechanism of the influence of ABS on catalytic activity through methods of XRD

BET

FTIR

TGA

etc. Density functional theory (DFT) calculation was employed to theoretically study the mechanism of different active sites of the catalyst. Denitrification

bench experiments were conducted on the ABS-loaded catalyst. Results show that ABS deposition leads to a decrease in the specific surface area of the catalyst. When the ABS content is low

sulfur-containing groups on the catalyst surface primarily exist in the form of SO

. As the ABS content increases

HSO

functional groups are generated. The main active sites for the reaction in the catalyst are the Lewis acid sites of vanadium oxide. Sulfide generated by the decomposition of ABS within the catalyst contains Brnsted acid sites which can store NH

thus contributes to a certain improvement in catalytic activity. ABS-loaded catalyst exhibits stronger denitrification activity at higher temperature

consistent with DFT calculation results. From a microscopic perspective

trace amount of ABS can enhance catalytic activity.

关键词

Keywords

references

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