%0 Journal Article
%T The investigation of the NH3-SCR performance of a copper-based AEI-CHA intergrown zeolite catalyst.
%A Ye H
%A Ren K
%A Wang P
%A Wang L
%J Front Chem
%V 10
%N 0
%D 2022
%M 36531316
%F 5.545
%R 10.3389/fchem.2022.1069824
%X This work prepared an ISAPO-34/SAPO-18 intergrown zeolite using phosphate organoamine as the structure guiding agent. Physical-chemical characterizations by XRD, SEM, TG, and BET showed that the SAPO-34/SAPO-18 presents a cross-stacked cubic block-like microscopic morphology, with characteristic diffusive diffraction peaks at 2θ = 16-18° and 30-33° and a specific surface area of 557 m2 g-1. The series of copper-based catalysts prepared from SAPO-34/SAPO-18 showed a shift of the active temperature window to a lower temperature with increasing copper content. Moreover, the Brønsted acid site decreased significantly due to copper ion exchange and zeolite structure framework damage. Among them, the 1.2 wt% sample showed the widest active temperature window, with a T90 range of 175-435°C. After low-temperature hydrothermal aging treatment, the zeolite structure was eroded and the catalyst activity deteriorated significantly.