Reconstruction and recovery of anatase TiO<sub>2</sub> from spent selective catalytic reduction catalyst by NaOH hydrothermal method

Jinlong Liu; Chenye Wang; Xingrui Wang; Chen Zhao; Huiquan Li; Ganyu Zhu; Jianbo Zhang

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Reconstruction and recovery of anatase TiO₂ from spent selective catalytic reduction catalyst by NaOH hydrothermal method

Full Length Article | Updated：2026-01-06

- Reconstruction and recovery of anatase TiO₂ from spent selective catalytic reduction catalyst by NaOH hydrothermal method
- Chinese Journal of Chemical Engineering Vol. 60, Issue 8, Pages: 53-60(2023)
- Affiliations：
  
  1. CAS Key Laboratory of Green Process and Engineering, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. School of Chemical Engineering, University of Chinese Academy of Sciences,Beijing,China,100049
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2023
- Accepted：
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from spent selective catalytic reduction catalyst by NaOH hydrothermal method[J]. 中国化学工程学报, 2023, 60(8): 53-60.
DOI：

from spent selective catalytic reduction catalyst by NaOH hydrothermal method[J]. 中国化学工程学报, 2023, 60(8): 53-60. DOI：

摘要

Abstract

The improper disposal of spent selective catalytic reduction (SCR) catalysts causes environmental pollution and metal resource waste. A novel process to recover anatase titanium dioxide (TiO

) from spent SCR catalysts was proposed. The process included alkali (NaOH) hydrothermal treatment

sulfuric acid washing

and calcination. Anatase TiO

in spent SCR catalyst was reconstructed by forming Na

(OH)

nanosheet during NaOH hydrothermal treatment and H

(OH)

during sulfuric acid washing. Anatase TiO

was recovered by decomposing H

(OH)

during calcination. The surface pore properties of the recovered anatase TiO

were adequately improved

and its specific surface area (SSA) and pore volume (PV) were 85 m

·g

-1

and 0.40 cm

·g

-1

respectively. The elements affecting catalytic abilities (arsenic and sodium) were also removed. The SCR catalyst was resynthesized using the recovered TiO

as raw material

and its catalytic performance in NO selective redu

ction was comparable with that of commercial SCR catalyst. This study realized the sustainable recycling of anatase TiO

from spent SCR catalyst.

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Reconstruction and recovery of anatase TiO2 from spent selective catalytic reduction catalyst by NaOH hydrothermal method

DOI：

摘要

Abstract

关键词

Keywords

references

Reconstruction and recovery of anatase TiO₂ from spent selective catalytic reduction catalyst by NaOH hydrothermal method