Silica Gel has great deal of internal surface area. It is a tasteless, odorless, non-toxic, non-corrosive, and chemically inert substance. It is a highly activated adsorbent that is available in numerous mesh sizes designed for many uses in industry. During adsorption, there is no chemical reaction in the silica gel, and no byproducts are created. it is non-deliquescent, and its shape and size never change. Its outer surfaces stay dry and it remains free-flowing, even when it is saturated with water.
Silica gel strongly prefers to adsorb water over most other substances. However, it also works well as an adsorbent for sulfur and nitrogen compounds, CO2, C12, HC1, gasoline-range hydrocarbons, aromatics, and many other compounds. Bulk gels can adsorb many of these substances in large quantities. It is used widely for a broad range of industrial applications requiring a selective adsorbent or a high-capacity desiccant