Catalyst and preparation method therefor, oxynitride treatment device, and vehicle
By introducing a combination of copper and a specific molecular sieve structure into the catalyst, the distribution of active sites in the catalyst is optimized, and the catalyst is loaded onto a porous ceramic support. This solves the problem of low conversion rate of nitrogen oxide gas reduction reaction in the temperature range of 550℃ to 650℃, and achieves more efficient nitrogen oxide gas treatment.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-12-10
- Publication Date
- 2026-07-09
AI Technical Summary
Existing catalysts have low conversion rates in the reduction reaction of nitrogen oxides in the temperature range of 550℃ to 650℃, which affects the efficiency of nitrogen oxide gas treatment systems.
Copper was used as the catalytic active component. By adjusting the mass ratio of copper to molecular sieve to a range of 0.01 to 0.04, and combining Cu-SSZ-13 and Cu-SSZ-39 molecular sieve structures of AEI and CHA types, the distribution of active sites of the catalyst was optimized. The catalyst was loaded on a porous ceramic support, and first and second catalytic regions were set to adapt to different reaction stages.
The conversion rate of nitrogen oxide gas reduction reaction of the catalyst was improved in the temperature range of 550℃~650℃, the stability and activity of the catalyst were enhanced, and the catalytic efficiency was improved in the overall temperature window range.
Smart Images
Figure CN2025141540_09072026_PF_FP_ABST