Review: recent advances in biogas purifying technologies

ABSTRACT

Biomethane production through biogas upgrading is a promising renewable energy for some industries which could be part of the equilibrium needed with fossil fuels consumption to achieve a sustainable society. This paper presents a comprehensive list of biogas upgrading technologies focused on carbon dioxide removal as well as recent advances reported by researcher with wide expertise in this topic. Additionally, an extensive costs–performance comparison among the technologies studied is discussed. Among the different alternatives, chemical scrubbing stood out to achieve high biomethane purities while cryogenic technologies proved to be effective against methane losses. Regarding the different costs, water scrubbing and membrane separation seem to be the most affordable techniques.

KEYWORDS:

• Biogas upgrading
• carbon dioxide
• carbon capture and utilization
• chemical absorption
• membrane technologies

Additional information

Funding

This work was supported by the University of Seville through his V PPIT-US. Furthermore, this work was supported by EMASESA through NURECCO2 project and Corporación Tecnológica de Andalucía (CTA);EMASESA (CTA GRANT);