3results about How to "Wide active temperature window" patented technology

The present invention relates to the technical field of catalysts, and discloses a close-coupled SCR catalyst and a preparation method and application thereof, wherein the catalyst comprises a molecular sieve and indium oxide; the indium oxide is loaded on the surface of the molecular sieve in the form of particles; the indium oxide is A x In 1‑x O y , wherein A is one or more selected from Ce, La, Pr, Nb, Ga, Ni, Gd, Zn, Cr, Sr, and Zr; In is indium; O is oxygen; 0≤x<1, and y is determined by the chemical formula balancing method of indium oxide. The catalyst obtained by the present invention not only effectively improves the catalyst's resistance to hydrocarbon poisoning, solves the problem of catalyst deactivation due to hydrocarbon poisoning in the ccSCR system, but also improves the catalyst's low-temperature activity, broadens the active temperature window and N 2 Selective.

The application discloses a low-temperature denitration catalyst and a preparation method thereof, and belongs to the technical field of flue gas denitration catalysts. 60 The catalyst is prepared by doping fullerene C 60 The pi electron system of C 60 is highly delocalized on the three-dimensional curved surface thereof, so that C 60 has excellent electron transfer capacity; and the doping proportion of C 60 can effectively promote the rapid progress of the catalytic reaction. Therefore, the catalyst prepared by the application can be applied to low-temperature flue gas denitration, can significantly improve the denitration efficiency, can widen the active temperature range of the catalyst, and can solve the problems of poor low-temperature activity, insufficient sulfur resistance and easy poisoning of traditional catalysts.

This invention relates to a method for the selective catalytic reduction of NO by ammonia. x This invention relates to a catalyst, its preparation method, and its application, belonging to the field of environmental catalysis and air pollution control technology. The catalyst comprises a support, a main active component, and a modifying agent. The support is selected from SAPO-18 molecular sieve, the main active component is selected from Cu, and the modifying agent is selected from Zr. The space velocity is 88,000 h⁻¹. ‑1 At that time, the ZrCu-SAPO-18 molecular sieve catalyst, within the temperature range of 225–450℃, produced NO x The conversion rate reached over 90%; after hydrothermal treatment at 750℃ for 12 hours, NO was reduced within the range of 175–400℃. x The conversion rate remains above 90%. The catalyst of this invention can be used to remove NO from diesel vehicle exhaust and stationary source flue gas. x Highly efficient removal.