LAUSR

Biogas contains carbon dioxide in the range of 35–45 vol %. Upgrading biogas to biomethane is primarily based on carbon dioxide removal. Biomethane is essentially purified biogas that contains at least 95 vol % methane and it can be either used as fuel for vehicles running on compressed natural gas (CNG) or injected into the natural gas grid. Nowadays, various techniques are used for CO2 removal from biogas. Among the most commonly used technologies are adsorption, absorption, cryogenic separation, and membrane separation. Currently, in the Czech Republic, no units for biogas upgrading to biomethane are operating. In addition, during the summer months, there is heat overproduction from the co-generation units. In this work, a suitable unit for carbon dioxide separation is proposed. Carbon dioxide separation is possible using membrane separation. Along with carbon dioxide, minor compounds present in biogas such as hydrogen sulfide and water are also separated. The implementation of this unit makes it possi...