Abstract: In the production process of petrochemical catalysts, extensive pneumatic conveying drying systems are employed for drying catalyst powders. Conventional dust collection technologies – including bag dust collectors, cyclone dust collectors and spray scrubbers – exhibit low interception efficiency for catalyst particles. Significant quantities of catalysts are consequently released into the atmosphere or absorbed into spray water systems, resulting in both economic losses and environmental contamination. Gas purification membrane technology is a new type of gas-solid separation technology. The double-layer composite structure of the membrane material can intercept catalyst particles on the surface of the membrane, maintain high interception efficiency, reduce the operating resistance of dust collectors and reduce operating energy consumption. It is of great significance for reducing pollution and carbon emissions in the production process of petrochemical catalysts.

Key words: gas purification membrane, petrochemical industry, pneumatic conveying drying, catalyst, recovery