Tuesday, 27 December 2016

Molecular Sieve Adsorbents for Effective CO2 Removal

When we think of adsorbents, the first thing that comes to mind is Silica Gel. This, however, is not the only adsorbent being used by companies to remove moisture from closed spaces. Molecular Sieve Adsorbents are high-quality desiccants, which are equally effective in maintaining optimum humidity levels. Molecular Sieve Adsorbents are basically crystalline alumino-silicates, commonly known as zeolites.

One may think that Molecular Sieve Adsorbents are only used for water vapour adsorption. That is, however, not the only thing it is used for. Molecular Sieve Adsorbents are utilized for adsorption of other compounds as well. One of them is Carbon Dioxide. Molecular Sieve for CarbonDioxide removal is very common among companies.

For obtaining an adsorbent with typical molecular sieve properties one makes use of thermal processing of granulated carbonaceous material at temperatures of 970-980 degree Celsius. This is usually done in the presence of gases to prevent the oxidation of the carbon material. At temperatures of around −196° C, the adsorption takes place in its micro-pores, whereas nitrogen and argon are taken in at the same temperature at the surface of transitional pores and macro-pores only.

It is mainly oil and natural gas companies, which make use of Molecular Sieve Adsorbents to remove carbon dioxide. It is mainly used to remove CO2 from stream cracked gas, Liquid Petroleum Gas and different atmospheric gases. Mainly, Molecular Sieve 3A and 4A is preferred for the above mentioned purposes.

There are many reasons why Adsorbents 3A and 4A are widely used for carbon dioxide removal. The first being these adsorbents have a high and very rapid adsorption rate. Another factor is that molecular sieve adsorbents are known to have a consistent adsorption speed and have a higher contamination resistance. All these factors make Molecular Sieve adsorbents the ideal substance for removing carbon dioxide from oil and natural gas industries.