How Activated Alumina Dries Natural Gases?

What is Activated Alumina?

Activated Alumina is a very popular type of desiccant. It is created by dehydroxylating aluminium hydroxide in such a manner that a finely porous substance is produced. Activated alumina or active alumina, as it’s commonly known, has a considerably strong surface area to weight ratio, which makes it a very useful adsorbent. The large surface area of Activated Alumina is due to its numerous even-sized pores.

Due to its strong adsorption properties, Activated Alumina mainly finds use in filtration processes. The desiccant is used to filter fluoride, arsenic and selenium particles in drinking water. Activated Alumina also has many other uses. These include assimilation of the catalysts present in polyethylene production and in the manufacturing of hydrogen peroxide. Activated alumina for gas drying is another function of this desiccant.

How Activated Alumina works as a Desiccant

The main reason why there is so much demand for Activated Alumina is because of its high-absorbing capacity. Activated Alumina makes use of the process of adsorption to carry out its functions. In this process, when air passes through the desiccant, the water molecules present in the air will be caught between the tiny pores of the Activated Alumina. This happens because the water molecules are too big to cross the tiny pores. In this method, the air, which comes out is completely dry and devoid of any moisture, dust or other particles. Activated Alumina can be used again after regenerating the desiccant.

How Activated Alumina is used to Dry Gases

A main use of Activated Alumina desiccant is in the drying of natural gases. This procedure is highly important in the petroleum and natural gas industries where gases must be rid of all moisture and impurities. The presence of humidity and other particles will lead to problems like ice formation, corrosion and catalyst contamination in the natural gas pipelines. It is in order to avoid issues like these; the gases are first passed through desiccants like Activated Alumina.

Usually Activated Alumina finds use for two purposes, removing water from both air and gas streams. In the natural gas industry, it is mainly employed to dry compressed air and dry gases with relatively high moisture contents. Activated Alumina for gas drying is seeing great demand from the air service industry where fluctuating gas velocities, pressures and regeneration frequencies have always been issues.

Another major factor why more and more companies are selecting Activated Alumina for gas drying is because of its lower cost. Other benefits include chemical and physical toughness and high surface area.


Originally published at activatedaluminaballs.tumblr.com.