Biogas Cleaning For Efficient Energy Production

Biogas is a gas mixture formed mainly by methane (CH4), carbon dioxide (CO2), N2, O2, H2, and traces of other components such as H2S, water vapor, siloxanes, and hydrocarbons. All these traces are dangerous to its use or application. Therefore, it is considered a dirty gas that requires prior cleaning for energy production or as a raw material for Biomethane, H2, or Methanol production.

Currently, according to its production manner or source, we can find:

• Biogas-Uncontrolled Process- Examples: Landfills, lakes, or swamps
• Biogas-Controlled Process- Example: WWTPs

Cleaning Techniques for Biogas

The biogas. Whatever its origin, it is a dirty gas. In biogas, two types of impurities can be distinguished that must be removed for the good work of the facility.

External Impurities

External impurities are not part of the biogas flow. This must be the first to be removed. These are generally removed by mechanical operations such as filtration and/or change in the dimension or direction of biogas flow. Examples. Sediments, foams, particles, and condensates. These impurities are mainly found in the biogas stream, leaving the digester, mainly in WWTP. This biogas cleaning is defined as Gross removal.

Internal Impurities

Internal impurities are part of the biogas flow. They are…