Gasoline olefin content
Thread Content
In tests for the olefin content in gasoline, there are a wide variety of silica gel products available on the market, with varying prices. Are there any standards that define the differences between them?
Silica gel comes in different particle sizes, ranging from 100 to 200 mesh, and from 200 to 300 mesh; the higher the mesh number, the finer the particles. We mainly use these two. But I’m not here to analyze ethylene in gasoline. It seems that silicone is mainly produced in Qingdao; you can give them a call to ask. :)
Generally speaking, silicone can be divided into two main categories based on its properties and composition: organic silicone and inorganic silicone. Inorganic silica gel is a highly active adsorbent material, typically produced by reacting sodium silicate with sulfuric acid, followed by a series of post-treatment processes such as aging and acid treatment. Silica is an amorphous substance, with the chemical formula mSiO2·nH2O. It is insoluble in water and any solvents, non-toxic and odorless, with stable chemical properties; it does not react with any substances except strong bases and hydrofluoric acid. Different types of silicone develop distinct microporous structures due to their varying manufacturing methods. The chemical composition and physical structure of silicone determine that it possesses many properties that are difficult for other similar materials to replace: high adsorption capacity, good thermal stability, stable chemical properties, and high mechanical strength. Silica gel is classified according to the size of its pore diameter into: macroporous silica gel, coarse-pored silica gel, type B silica gel, and microporous silica gel. Due to their different pore structures, their adsorption properties vary. Macroporous silica gel has a higher adsorption capacity at high relative humidity, while microporous silica gel exhibits a higher adsorption capacity at low relative humidity compared to macroporous silica gel. As for type B silica gel, its pore structure being intermediate between that of macroporous and microporous silica gel, its adsorption capacity is also intermediate between the two. Macroporous silica gel is generally used as a catalyst carrier, matting agent, toothpaste abrasive, etc. Therefore, different varieties should be selected according to different uses.