Adsorbent materials find their uses and advantages in various different applications across varied industries, for separating, identifying, and purifying numerous compounds from a mixture, as well as for chromatography processes, and as a catalyst bed for chemical reactions. Because adsorbent materials are porous, they have a high surface area, which allows pollutants to stick to the surface.
The porous nature of adsorbent materials means that they have many small holes and cracks in their structure. When a solution with pollutants passes over or through adsorbent materials, the pollutants adhere to the surface of the adsorbent materials due to physical or chemical adsorption.
There are many different types of adsorbent materials that are used for various applications, each with its unique characteristics, advantages in industry, and properties. Let us check out the main types of adsorbent materials that are widely used in industrial applications.
Activated carbon is a popular adsorbent material that is highly porous and has a large surface area, and is typically derived from coal, wood, coconut shells, or other sources of charcoal. Because carbon molecules are activated using a high-temperature process, their adsorption characteristics are improved as it makes it easier to bind to a variety of molecules and chemical ions.
This type of carbon desiccant material has varying pore sizes and thus can adsorb a lot of different compounds from a mixture of gases, solids, proteins, etc. It is capable of adsorbing a broad range of contaminants, such as organic compounds, metals, and gases, and is chemically resistant to the majority of acids and bases.
Activated carbon adsorbents are commonly employed in water treatment processes to eliminate contaminants that are mostly prevalent and found in wastewater or industrial water samples, including chlorine, organic compounds, heavy metals, so they can be used in further industrial applications or other uses.
It is also employed in air purification processes to eliminate several commonly found pollutants, such as sulphur, nitrogen, and VOC from the surrounding air that can be used for various industrial processes. Activated carbon is used in various chemical processing processes to eliminate impurities, separate various compounds from a mixture, and catalyze chemical reactions.
This is one of the most well-known and popular desiccant materials, that is widely used for numerous applications across varied industries. It is essentially made out of silicon dioxide, and the activated silica gel material has a very large surface area, that typically provides silica gel its excellent adsorption properties to adsorb moisture, vapor, dust, water molecules, and many other elements efficiently.
It is a non-toxic, and chemically stable material, that has a high affinity for water molecules, which is why it is commonly employed in the dehumidification process to eliminate moisture from the atmosphere. Silica gel can be found in a variety of applications and machinery, such as dehumidifiers and shipping containers, and food packaging, to maintain product dryness and arrest the growth of mold, mildew, and bacteria microorganisms on the contents of the packaging, keeping them safe and potent through their shelf life.
Silica gel is used in some chemical reactions as a catalyst, like for instance, it's used to make biodiesel. It also finds its application and uses in chromatography as a stationary phase to separate different parts of a mixture.
They are similar to molecular sieves, which are naturally occurring or synthetically produced, which have a well-defined pore structure, and larger surface area to efficiently adsorb many different compounds from a mixture. Just like molecular sieves, their pores are just large enough to allow certain molecules of the mixture to pass through while adsorbing the others, this provides zeolites with their high adsorbing capabilities.
The ion exchange capacity of zeolites is very high, and they are able to exchange metal ions within their structure with other metal ions that may be present in the solution during the separation process.
Zeolites are utilized in the treatment of water to eliminate heavy metals and other impurities. They are employed in the softening of water and the removal of ammonia from wastewater, as well as in the purification of air to eliminate pollutants, including nitrogen oxides, sulphur dioxide, and VOCs.
Activated alumina balls
Aluminum oxide is used as an adsorbent material in the production of activated alumina balls, that are formed by heating aluminum oxide at a high temperature, resulting in a porous structure for the adsorbent material. The surface area of activated alumina balls is up to 700 square meters per gram, giving them a large capacity for adsorption and giving them high mechanical strength.
Activated alumina balls are a strong and durable material that can withstand high temperatures and pressures, and are chemically stable and resistant to most acids and bases, making them a great suitable option for several chemical reactions and processes.
Alumina balls are commonly used for air and gas drying purposes in various industrial applications, including compressed air dryers, natural gas dryers, and refrigerant dryers, as they can efficiently remove any moisture and water content from the surrounding air making it clean and dry for use in these processes.
Alumina balls are also used for water treatment, removing fluoride, arsenic, and other contaminants from water to purify it before use in other processes. When activated, the alumina balls can be best used as a catalyst bed for several chemical reactions, catalyst reactions, and processes. Make sure to buy from a trusted and well-known manufacturer to obtain high-quality adsorbent materials.
Carbon molecular sieves
Carbon molecular sieves are a type of porous carbon material with a well-defined pore structure. The adsorption process of the pressure swing process, which separates nitrogen from air, is largely dependent on the presence of activated carbon. But, they differ from activated carbon in terms of the distribution of pores and surface area, making them essential for the commercialization of this process.
These types of molecular sieves have a very high surface area, which is around 1000 square meters per gram, and a narrow pore size distribution, making them ideal for so many different industrial applications. They are widely used in industrial applications such as air and gas separation techniques such as separating oxygen, nitrogen, and hydrogen from surrounding air.
It also has good thermal properties, and high chemical stability, so it can withstand higher temperatures, and does not react with other chemical substances during any process. They can be easily regenerated and reused numerous times.
These different types of adsorbent materials are used to purify different elements and in numerous industrial applications, for their high surface absorbency properties, reusability, sustainability, and high strength.