Various Types of Silica Gel for Adsorption of Moisture and Water Drying

  • ChemBro
  • 07 Mar 2021
various-types-of-silica-gel-for-adsorption-of-moisture-and-water-drying

In the field of exporting products that are more prone to a small rise in humidity, a component that can absorb moisture and water is important. Silica Gel is one such portion, which is made up of Sodium Silicate and functions as a desiccant or drier with a microscopic pore size of 2.4 nanometers and a surface area of 700-800 square meters per gram, and plays a key role in humidity regulation due to its high affinity for absorbing water molecules from the environment. Because of its ability to absorb and un-absorb moisture, Silica Gel has an unlimited existence and can be reconditioned and reused. Silica Gel is a non-volatile, stable substance.

The best way to keep compressed air devices dry is to use Silica Gel desiccant. Silica Gel is doped with moisture markers such as Methyl violet and Cobalt Chloride so it has the capacity to transform from an anhydrous to a hydrous state. As a result of the impregnation of those markers, Silica Gel Desiccant comes in a variety of colors as a result of moisture and water absorption.

Silica Gel can be used in two different forms: beads and crystals. Silica Gel is a colorless, odorless solid that is often interchangeable with silica xerogel, and results in a granular shape that is purified and manufactured to create Silica Gel beads. Visible chemical markers are impregnated in Silica Gel beads to show moisture absorption. As a result, different coloured Silica Gel beads are available, based on the absorption potential of each. By coagulating a silica acid solution, blue Silica Gel crystals are formed. Because of the internal surface of about 800mz, Silica Gel crystals are extremely effective.

Silica Gel Blue

If Silica Gel is transfused with Cobalt Chloride in dry form, it becomes Silica Gel blue, but when it is hydrated, it becomes Silica Gel pink. It retains 5% moisture and changes color based on the amount of moisture absorbed, ranging from blue to purple to light red. As a result, it is used as a desiccant to prevent moisture damage. Silica gel blue is also used in the chemical industry and as a Transformer breather.

Silica Gel Orange

Since then, Silica Gel blue has been shown to be harmful, and it has been substituted by Silica Gel Orange, which uses methyl violet as an alternative symbol. When Silica Gel orange is dry, it retains its orange color, but when hydrated, it turns green. It absorbs up to 2% moisture and changes color based on the amount of moisture absorbed, ranging from light brown-yellow to light brown-green to blackish green. As a result, it's used in drugs, leather, and electrical equipment. Orange Silica Gel is also used for cooling and purification of power and air.

Silica Gel White

When Silica Gel is not transfused with indicating agents, it remains in the Silica Gel white form, which absorbs 5% moisture and changes color based on moisture absorption, i.e. from white to semi-transparent, and then to non-transparent. As a consequence, it's used as a catalyst transporter, rust inhibitor, and gas drier. Silica gel white is also used in the power industry and for flower and seed drying.