Preparation method and application of Nb-Ce-Zr denitration catalyst for SCR degradation

By using NB-CE-ZR active components and CE, ZR, combined with the TIO2 carrier, the NB-CE-ZR/TIO2 catalyst is prepared to solve the problem of insufficient low temperature activity of the existing SCR catalysts and narrow operation temperature windows, realizing the realization It has efficient NO transformation and stable catalytic performance, suitable for industrial applications.

CN115920876BActive Publication Date: 2025-01-28CHONGQING UNIV OF TECH
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Patent Information

Application Number
CN202111111505.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-09-23
Publication Date
2025-01-28
Estimated Expiration
2041-09-23

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Abstract

The invention discloses a method for NH 3 Nb‑Ce‑Zr / TiO for NO degradation by SCR 2 The catalyst and its application belong to the field of air pollution control and environmental catalysis. 2 As the carrier, Nb is the main active component and metal Ce and Zr are the auxiliary agents. It is prepared by impregnation method. First, weigh the stoichiometric ratio of C 10 H 5 NbO 20 ·xH 2 O、Zr(NO 3 ) 4 ·5H 2 O and Ce(NO 3 ) 3 6H 2 O was dissolved in deionized water and dissolved by magnetic stirring, and then the carrier TiO was added to the solution. 2 , stirred magnetically in a 70°C water bath until the water evaporated completely. The obtained powder was then placed in a drying oven to dry overnight, calcined at 500°C for 5h, and cooled naturally to obtain Nb‑Ce‑Zr / TiO for SCR NO degradation. 2 Catalyst. The Nb-Ce-Zr / TiO 2 The catalyst has a high SCR NO degradation capability. At the same time, the additives Ce and Zr can play a good synergistic catalytic role with the active component Nb, which improves the medium and low temperature activity of the catalyst and broadens the operating temperature window of the catalyst.
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Citation Information

Patent Citations

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