We are all familiar with the term "sweetening." It mainly refers to the procedure of adding sugar to tea or other similar beverages. However, in the gas purification process, the term "sweetening" has a completely different connotation. It has nothing to do with sweets or the processes that go along with them.
What is biogas sweetening?
As far as we know, biogas is made from biological waste. It could come from a plant or an animal. Polypeptides, proteins, and lipids make up the majority of an animal body. The main component of plant waste is cellulose, which is made up of carbon, hydrogen, and oxygen. In addition, fats include carbon, hydrogen, and oxygen. The main byproducts of fat processing are carbon oxides or hydrides, as well as water. Carbon dioxide and methane are two examples.
Polypeptides and proteins, on the other hand, contain nitrogen and sulphur in addition to the carbon, hydrogen, and oxygen found in fat. These two extra elements, when combined with other elements, form a range of odorous and acidic compounds. Sulphur products that are acidic or weakly acidic, such as COS, CS2, H2S, RSH, and basic materials, such as NH3, RNH2, R2NH, R3N, and CO2 and CH4, are among these compounds. All acidic materials have a sour flavour, and biogas made from acidic materials is known to be sour. The sweetening process is the process of removing these sulphur compounds from biogas.
Biogas sweetening/removal of H2S from biogas
Since the biogas will be a foul-smelling and difficult to handle, it will need to be sweetened. Furthermore, the gases created by the biogas combustion will contain sulphur oxides, which will react with water to form acids, resulting in corrosion of all metal elements.
Different processes can be used to sweeten biogas!
Chemical scrubbing, biological scrubbing, iron oxide media filtration, and activated carbon filtration are some of the most frequent biogas sweetening methods. The filtration process, such as Biogas sweetening and Odour control systems, is chosen based on the application of biogas and the biogas plant's capacity.
In a nutshell, activated carbon is the most effective substance. Typically, one of the typical transition metal salts will suffice. The salt's acid radical should be basic in nature in order to efficiently eliminate it.
Sulphur compounds are typically acidic, whereas nitrogen molecules can be basic (such as ammonia) or neutral. All of these neutral and basic nitrogen molecules are absorbed by the metals “d” orbital.
What are the benefits of using a Biogas Sweetener?
• The procedure is entirely biological. Utilize the power of nature to save money.
• Completely risk-free. Long-term trouble-free operation is ensured by safety features.
• There are no consumables at all. This method does not necessitate the use of caustic soda or the changing of media on a regular basis.
• Can handle a wide range of input concentrations.
• Self-cleaning technologies eliminate the need for maintenance.
• For a tiny footprint, a compact vertical tower design is used.
• Simple to use.
• Any conditioning technology has the lowest life cycle cost.
To limit the risk of fouling, biogas sweetening solutions use a special packing design that combines big surface areas with large open spaces.
Solutions are available for up to 99% destruction efficiency and can be configured to meet your project's exact cost and footprint requirements.
The team at Netsol Water has spent a lot of time researching and testing the best filtering solutions for odour control applications. Furthermore, Netsol offers numerous green technology solutions such as air purification and corrosion control.