Efficient preparation and denitration performance of Cu/SAPO-34 catalyst

Abstract

Cu/SAPO-34 is a highly efficient catalyst that can be used in various catalytic fields. However, the use of phosphoric acid during the preparation process exacerbates environmental pollution issues. This article uses aluminum phosphate as a new raw material and uses direct ion exchange to effectively control and reduce pollution in the process of preparing Cu/SAPO-34. A series of physical and chemical properties and catalytic performance of the catalyst were analyzed and studied using various characterization instruments. The results indicate that the Cu/SAPO-34 catalyst has more isolated Cu²⁺ and Cu[OH]⁺ sites than the Con-Cu/SAPO-34 catalyst prepared by traditional methods, and exhibits excellent ability to remove NO_x in the temperature range of 100–550 °C.