用于废SCR催化剂回收载体的脱铁方法及脱铁载体和应用
By treating the waste SCR catalyst support using induced alkaline leaching and reduction-complexation methods, the problem of iron removal was solved, the structure and activity of the support were restored, and efficient iron removal and removal of harmful impurities were achieved, meeting the requirements for the use of SCR catalysts.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA ENERGY INVESTMENT CORP LTD
- Filing Date
- 2023-02-06
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies are insufficient to effectively remove iron from the recovery support of spent SCR catalysts, resulting in excessively high iron content in the support, which affects the SO2/SO3 conversion rate and service life of the SCR catalyst.
By employing an induced alkaline immersion modification combined with a reduction-complexation method, an insoluble sodium titanate nano-carrier surface is generated, restoring the specific surface area and pore volume. Furthermore, ferric iron is reduced to ferrous iron to form a stable complex that dissolves in the liquid phase, thereby achieving deep removal of iron and harmful impurities.
It significantly improved the iron removal efficiency to over 95%, restored the structure and activity of the support, met the standards for SCR catalysts, and extended its service life.
Smart Images
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