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D4.9 Final Unit TPER prototype demonstration - Executive Summary

This report outlines the development and testing of a TRL5 pilot system for Limoxal production from captured CO2 through an integrated process. The system comprises four key modules: CO2 capture and concentration using advanced selective membranes, syngas production via a photoelectrochemical reactor (PER), hydroformylation of limonene into Limoxal, and product purification. The pilot demonstrated the effective capture and concentration of CO2, achieved through a membrane-based system that efficiently saturated the catholyte. Syngas production highlighted the potential of electrochemical reduction to convert CO2 and water into a CO:H2 mixture, however with relatively low FE%. The solar-driven reaction could not be performed due to the limited mechanical stability of FTO-based photoanodes and the performance challenges of the custom-made photovoltaic modules. The hydroformylation reaction was conducted using syngas generated from captured CO2 derived from a simulated gas mixture, with the aim of synthesizing Limoxal.

These advancements provide valuable insights and a solid foundation for further optimization towards scalable industrial applications of CO2 conversion technologies.