一种海泡石基催化剂新材料、制备方法及其在中低温SCR脱硝中的应用
Mn oxide supported catalysts were prepared by acidification with hydrochloric acid or nitric acid and freeze-drying, which solved the problems of catalyst inhomogeneity and calcium salt blockage caused by high-temperature calcination and sulfuric acid acidification in the prior art, and achieved high efficiency, stability and economy of medium and low temperature SCR denitrification.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GUANGXI UNIV FOR NATITIES
- Filing Date
- 2024-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing medium- and low-temperature SCR denitration catalysts are prone to sintering during high-temperature calcination, resulting in uneven distribution of active components. In-situ growth methods may damage the support structure, and sulfuric acid acidification can lead to calcium salt precipitation and blockage, affecting catalyst activity.
A Mn oxide supported catalyst was prepared by acidifying sepiolite with hydrochloric acid or nitric acid, combined with freeze-drying and neutralization with an inorganic weak base. This method avoids high-temperature calcination, enhances the support structure and the dispersibility of the active components, and improves the specific surface area and redox performance of the catalyst.
It achieves efficient denitrification at medium and low temperatures, has a wide catalyst activity range, good sulfur resistance, reduces the denitrification temperature, improves the stability and economy of the catalyst, and avoids the problems of high-temperature sintering and calcium salt poisoning.
Smart Images
Figure CN118616039B_ABST