How To Remove Acidic Substances From Gas

Natural gas is known for its concentration of acidic components and therefore it is important to have them removed. However, this is a complex task and therefore one should have some basic information and knowledge about such removal processes. While there are many steps involved, it is important for you to understand the importance and significance of using the right hydrogen sulfide absorbent. There are basically three categories in which the absorption methods are classified and it would be interesting to have a closer look at them so that the right knowledge and information and is available.

Chemical Absorbent

The chemical absorbent is very common and effective. It works on the basis of chemical reactions of hydrogen sulfide and carbon dioxide being the active components as far as the absorbents are concerned. There are other types of chemicals that are also used as absorbents and they include monoethanolamine, triethanolamine, and much more. Additionally, alkaline solution and alkaline metal solutions and ferric hydroxide solutions are also used.

Physical Absorbents

Physical absorption is another commonly used method of removing acidic compounds from natural gas. This is done by determining the degrees of solubility of the various gas components. There are many absorbents that are available in the market today and they include brand names such as Selicsol, Rectisol, and Fluor amongst others. There is a difference between chemical absorption and physical absorption. With the latter it is possible to remove carbon oxysulfide, mercaptans, carbon bisulfide and also carbon dioxide and last but not the least hydrogen sulfide.

Physicochemical Absorbents

Physicochemical absorption is also now being extensively used. This method works by using composite absorbents. These are a mixture of physical as well as chemical absorbents. They are known to possess an intermediate capacity for dissolving the acidic components that are found in natural gas. They are preferred because they have the capability of fine h2s removal of various gases such as carbon dioxide, hydrogen sulfide and also not so easily removable compounds that are organic sulfur in nature.

Which Option To Choose

Each of the above methods has its own unique properties and advantages. Hence, the onus lies on the end users to choose the method that they think suits the best. It is better left to engineers and scientists who are the right persons to choose the right option taking into account the quality of the natural gas, the acidic substances that it has, the concentration of the same and various other factors. Though there could be many resources available on the print media and on the internet, these are good enough for enhancing knowledge and being informed. However, when it comes to the actual task of separating acidic compounds for gaseous substances, the role of professionals without any doubt continues to be extremely vital and important.

The Final Word

Apart from the above, there are also other factors and these include ecological standards and mandatory requirements that should be met for the disposal of sulfurous compounds. You should also take into account gas pressure and temperature, gas temperature and pressure after purification and much more. The composition of the gas is also something that one should always bear in mind while making the right choice for the removal of acidic compounds from gas.


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