Supported catalyst for removing nitrogen oxides, method of preparing the same, and removing method of nitrogen oxides using the same
US8911698B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 11, 2013 |
| Grant date | Dec 16, 2014 |
| Priority date | — |
| Expiry date | Nov 11, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N3/2066
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A supported catalyst for reduction reaction of nitrogen oxides includes a support and an silver (Ag)-based compound and aluminum fluoride which are immobilized in the support. A method for preparing the supported catalyst for reduction reaction of nitrogen oxides includes an impregnation step wherein aluminum fluoride, a hydrate or a salt thereof, and a silver (Ag)-based compound or a hydrate thereof are reacted with a support and a step of calcining the support. Nitrogen oxides in exhaust gas are removed by reacting with a reducing agent, in the presence of the supported catalyst for reduction reaction of nitrogen oxides. Wherein, the supported catalyst has an excellent nitrogen oxide removal efficiency at a practical exhaustion temperature of 270 to 400° C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.