Difference between activated alumina and molecular sieve：
Molecular sieves: Natural or synthetic chemicals with a network structure. Molecular sieves are crystalline silicates or aluminosilicates that link silicon-oxygen tetrahedrons or aluminum-oxygen tetrahedra via oxygen bridges to form a system of channels and cavities with molecular dimensions typically 0.3 to 2.0 nm, thereby having sieves.
The nature of the molecule：
Activated alumina desiccant: Activated alumina desiccant is also known as activate alumino. It is used for moisture and mildew protection. It acts as a desiccant. According to different adsorption methods and reaction products, it is a physical adsorption desiccant and a chemical adsorption desiccant.
Molecular sieve desiccant: a synthetic desiccant product, which has a strong adsorption effect on water molecules. The pore size of molecular sieves is controlled by differences in processing technology. In addition to adsorbing water vapor, it can also adsorb other gases. At high temperatures above 230°C, water molecules are easily adapted.