Recycling and reuse of TiO<sub>2</sub> carrier from waste SCR catalysts used in coal-fired power plants

QI Chunping; WU Wenfen; WANG Chenye; LI Huiquan

doi:10.11949/j.issn.0438-1157.20170504

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Recycling and reuse of TiO₂ carrier from waste SCR catalysts used in coal-fired power plants

更新时间：2025-12-10

- Recycling and reuse of TiO₂ carrier from waste SCR catalysts used in coal-fired power plants
- CIESC Journal Issue 11, Pages: 4239-4248(2017)
- 作者机构：
  
  1. 中国科学院过程工程研究所绿色过程与工程重点实验室, 湿法冶金清洁生产技术国家工程实验室,北京,100190
  2. 中国科学院大学,北京,100049
  3. 中丹学院,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170504
  CLC： 7
- Online First：05 November 2017，
  
  Published：05 November 2017
- 稿件说明：
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QI Chunping, WU Wenfen, WANG Chenye, et al. Recycling and reuse of TiO₂ carrier from waste SCR catalysts used in coal-fired power plants[J]. CIESC Journal, 2017, (11): 4239-4248. DOI: 10.11949/j.issn.0438-1157.20170504.
DOI：

QI Chunping, WU Wenfen, WANG Chenye, et al. Recycling and reuse of TiO₂ carrier from waste SCR catalysts used in coal-fired power plants[J]. CIESC Journal, 2017, (11): 4239-4248. DOI: 10.11949/j.issn.0438-1157.20170504. DOI：

摘要

以燃煤电厂废弃SCR脱硝催化剂为研究对象，考察了浸出时间、温度、液固比和NaOH浓度对碱浸过程Al、Si、V、W、Ti等元素浸出率以及浸出渣比表面积、孔容的影响。结果表明，碱浸的最优工艺条件为反应时间180 min、温度160℃、液固比15 ml·g-1、NaOH浓度2.5 mol·L-1。在最优工艺条件下得到的浸出渣主要成分为锐钛矿型TiO2，经稀硫酸洗涤后作为载体，通过负载与新鲜催化剂相同含量的WO3和V2O5，制备了V2O5-WO3/TiO2催化剂。对催化剂进行脱硝活性评价，结果表明，再生载体制备的催化剂脱硝活性恢复至新鲜催化剂水平，300℃时NO转化率达到97.8%，且具有良好的抗硫抗水性。

Abstract

The recycling and reuse of TiO2 carrier from waste SCR catalysts used in coal-fired power plants was studied. The influence of reaction time

temperature

liquid-to-solid ratio and NaOH concentration on the leaching efficiency of Al

W and Ti during leaching process

specific surface area and pore volume of leaching residue was investigated. The optimal leaching conditions were obtained with reaction time of 180 min

temperature of 160℃

liquid-to-solid ratio of 15 ml·g-1 and NaOH concentration of 2.5 mol·L-1. The main composition of the leaching residue obtained under optimal conditions was anatase TiO2

which was then used to synthesize V2O5-WO3/TiO2 catalysts with various V2O5 loadings after acid washing. The activity evaluation revealed that the resynthesized 0.7% V2O5-WO3/TiO2 catalyst was almost recovered to the level of fresh catalyst with NO conversion being recovered to 97.8% at 300℃

and it also showed a good resistance to SO2 and H2O.

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Recycling and reuse of TiO2 carrier from waste SCR catalysts used in coal-fired power plants

DOI：10.11949/j.issn.0438-1157.20170504

摘要

Abstract

关键词

Keywords

references

Recycling and reuse of TiO₂ carrier from waste SCR catalysts used in coal-fired power plants