The storage quality of catalysts directly affects their activity, selectivity and service life, serving as a fundamental part of material management in the chemical, environmental protection and other industries. The active components of various catalysts are highly susceptible to temperature, humidity, air composition and impurities. Improper storage control may lead to moisture absorption and caking, oxidation and loss of active components, crystal structure collapse and other defects, resulting in scrapped products and production losses. Accordingly, standardized storage management specifications must be strictly implemented.
The storage warehouse shall be cool, dry, well ventilated and away from direct sunlight, with a stable ambient temperature and no drastic temperature fluctuations. Direct sunlight exposure and placement near high-temperature equipment or heat sources are prohibited. The relative humidity inside the warehouse shall be kept below 60%. For oxidation-prone catalysts such as precious metal, nickel-based and copper-based catalysts, the ambient humidity shall be further lowered to avoid activity degradation caused by water vapor adsorption. Waterproof and moisture-proof measures shall be adopted; catalysts shall be stored on racks away from floors and walls to prevent penetration of ground moisture.
Catalysts shall be stored in sealed packages. Unused portions of high-activity catalysts shall be resealed promptly after opening. Oxidation-prone and deliquescent catalysts are recommended to be sealed with inert gas for air isolation. Zoned and classified storage shall be adopted in the warehouse. Mixing storage with acid-base reagents, strong oxidants, organic solvents, flammable and explosive materials is forbidden, so as to prevent catalyst poisoning and contamination from chemical reactions, as well as potential safety hazards.
Physical damage shall be avoided during routine management. Heavy stacking, impact and dropping are not allowed to prevent catalyst particle breakage and pore structure damage. Clear labels marked with model number, batch number and shelf life shall be attached to all materials. An inventory inspection system shall be established to regularly check package tightness and signs of moisture deterioration, and remove expired or degraded catalysts in a timely manner, so as to guarantee stable catalyst performance and compliance with production requirements.