Deactivation of vanadium and titanium based SCR catalyst used in coal-fired power plants

PAN Siwei; CHENG Hua; WEI Zhengle; HUANG Bichun; RUAN Dongliang

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Deactivation of vanadium and titanium based SCR catalyst used in coal-fired power plants

更新时间：2025-09-28

- Deactivation of vanadium and titanium based SCR catalyst used in coal-fired power plants
- Thermal Power Generation Vol. 43, Issue 1, Pages: 90-95(2014)
- 作者机构：
  
  1. 广东电网公司电力科学研究院
  2. 华南理工大学环境科学与工程学院
  3. 广东省大气环境与污染控制重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC： X773
- Published：2014
- 稿件说明：
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PAN Siwei, CHENG Hua, WEI Zhengle, et al. Deactivation of vanadium and titanium based SCR catalyst used in coal-fired power plants[J]. Thermal power generation, 2014, 43(1): 90-95.
DOI：

PAN Siwei, CHENG Hua, WEI Zhengle, et al. Deactivation of vanadium and titanium based SCR catalyst used in coal-fired power plants[J]. Thermal power generation, 2014, 43(1): 90-95. DOI：

摘要

针对某燃煤电厂钒钛基选择性催化还原(SCR)脱硝催化剂失活现象

运用N2吸附-脱附、扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线荧光(XRF)、热重分析(TGA)、傅里叶变换红外光谱(FT-IR)、程序升温还原(H2-TPR)分别对新鲜催化剂和已运行30 000h的旧催化剂进行结构表征

并结合SCR脱硝模拟试验考察K、Na、Ca、As等元素对催化剂活性的影响

综合分析SCR脱硝催化剂的失活原因。分析结果表明

催化剂活性降低是多种因素共同作用的结果

其中活性组分流失、碱/碱土金属和砷中毒是导致催化剂活性降低的主要原因

毒性组分中又以As影响最大

Ca、Na次之

K含量的增加在一定程度上造成了催化剂的失活

但影响有限。

Abstract

Taking the vanadium and titanium based SCR catalysts applied in a coal-fired power plant as research objects

fresh catalyst and after 30 000hours' operation catalyst were structural characterized by several analysis

such as N2 adsorption-desorption

SEM

XRD

XRF

TGA

Fourier-transform infrared(FT-IR)spectroscopy and temperature programmed reduction(H2-TPR).Furthermore

combing with the SCR denitration simulation test

the effect of K

As and other elements on activation of the catalyst was investigated to find out the reason for deactivation of the SCR denitration catalyst comprehensively.The results show that

decrease in catalyst activation was a combination action caused by multiple factors

among which the active component loss and being poisoned by alkali/alkaline earth metal and As were the major reasons.In all toxic components

As had the greatest effect on the catalyst's deactivation

then was Ca and Na.The increase of K also reduced the catalyst's activity to some extent

but with a limitation.

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