一种单原子铱掺杂的钯分子筛催化剂及其制备方法和应用
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
- Filing Date
- 2024-02-22
- Publication Date
- 2026-07-17
AI Technical Summary
Existing palladium catalysts suffer from insufficient low-temperature activity and poor high-temperature hydrothermal stability in methane oxidation reactions, making it difficult to effectively purify methane emissions, especially in natural gas vehicle exhaust and industrial waste gas.
A palladium molecular sieve catalyst doped with iridium atoms was used, with an all-silicon molecular sieve containing silanol nests as a support. By doping the surface of palladium oxide particles with iridium atoms, the low-temperature activity and hydrothermal stability of the catalyst were improved.
It significantly improves the low-temperature methane oxidation activity and high-temperature hydrothermal stability of the catalyst, achieving a methane conversion rate of 90% at 315℃ under anhydrous conditions and 90% at 438℃ under simulated natural gas vehicle exhaust, while maintaining excellent stability after hydrothermal aging.
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Figure CN118059922B_ABST