Abstract
The transition toward sustainable energy systems requires cost-effective and compact technologies for biogas upgrading. This work introduces a novel intensified process for CO₂ removal employing a Rotating Packed Bed (RPB) with a deep eutectic solvent (DES) based on Choline Chloride and Monoethanolamine (ChCl–MEA, 1:6 molar ratio). The RPB absorber and stripper, fitted with stainless-steel mesh packing, were operated under mild conditions (1 atm, 40 °C for absorption; 2 atm for regeneration) to treat a 500 m³/h biogas feed containing 39.8 % CO₂. More than 97 % CO₂ removal was achieved while maintaining low pressure drop and compact equipment footprint. The integration of a lean/rich heat exchanger and indirect reboiler reduced the regeneration duty to ~156 kW (dry basis), highlighting the process efficiency. This study demonstrates that combining DES chemistry with high-gravity technology enhances mass transfer rates, lowers energy consumption, and provides a scalable pathway for decentralized biogas upgrading and CO₂ valorization. The findings position RPB-based absorption as a promising alternative to conventional packed columns for next-generation carbon capture systems.
Presenters
Saharsadat ParviniStudent, PhD Candidate, Istanbul Technical University, Istanbul, Turkey
Details
Presentation Type
Paper Presentation in a Themed Session
Theme
Technical, Political, and Social Responses
KEYWORDS
Absorption, Biogas, Carbon capture,Deep eutectic solvent, Rotating packed bed
