ArticleACS sustainable chemistry & engineering2025
Biomass-Derived Solvents and Low-GWP Refrigerants as Working Fluids for Sustainable Absorption Refrigeration.
Article in ACS sustainable chemistry & engineering, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A shift toward more sustainable practices is critical for the refrigeration, air conditioning, and heat pump (RACHP) sector, which is responsible for significant greenhouse gas emissions due to its reliance on vapor compression refrigeration cycles. Absorption refrigeration systems (ARS) have been proposed as a promising alternative due to their ecofriendliness, especially when powered by low-grade heat. This work introduces a novel approach by incorporating eco-friendly and biobased solvents as working fluids in ARS for the first time. Five green organic solventssolketal, propylene carbonate, terpinolene, γ-valerolactone, and Rhodiasolv PolarCleanwere carefully selected based on their safety, operational, and environmental profiles, assessed by referring to the CHEM21 solvent selection guide. Subsequently, the affinity and interactions between these solvents and three hydrofluorocarbons (HFCs): R-32, R-125 and R-134a, and two hydrofluoroolefins (HFOs): R-1234yf and R-1234ze-(E), were assessed using COSMO-RS quantum chemical calculations. The vapor-liquid equilibrium (VLE) of the binary systems was experimentally determined at several temperatures and pressures, followed by an in-depth thermodynamic evaluation to select the most promising solvent-refrigerant pairs. Finally, the coefficient of performance (COP) and the circulation factor (
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