Mixed Catalyst SmMn₂O₅/Cu-SAPO34 for NH₃-Selective Catalytic Oxidation.

ABSTRACT: Low-temperature selective catalytic oxidation (SCO) is crucial for removing the NH₃ slip from the upstream of NH₃-selective catalytic reduction (NH₃-SCR). Herein, combining zeolite Cu-SAPO34 and the active oxidant mullite SmMn₂O₅, we developed mixed-phase catalysts SmMn₂O₅/Cu-SAPO34 by grinding powder mixtures to achieve a low-temperature activity and a reasonable N₂ selectivity. The physicochemical properties of the catalysts were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) measurement, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRI

SUBMITTER: Dong A 

PROVIDER: S-EPMC8928535 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature