Abstract:
Absorptive CO2 Capture (ACC) is widely embraced as a mature technology to mitigate CO2 emission, but it is
energy-intensive and expensive to implement on a commercial scale. It is envisaged that energy recovery could
be achieved during ACC by synthesizing and integrating a complex network of flexible heat exchangers to
transfer as much energy as possible from a set of hot flows to cold flows. This review provides information on the
progress made in the development of process and non-process integration-based techniques alongside their
benefits for effective energy recovery during ACC. An exposition on the integration of flexible Heat Exchanger
Networks (HENs), its synthesis methodologies, and developments for improving energy recovery during ACC is
presented. Furthermore, this review highlights the current state of knowledge creation in process integration and
ACC, as well as its underpinning principles, challenges, and opportunities to provide a summary and important
discussion on current practices in process integration-based strategies for energy recovery. Current opinions on
the integration of flexible HENs for energy recovery during ACC are highlighted. The review also presents a
proposed roadmap for large-scale energy recovery during ACC, and suggestions on the improvement opportunities for future research and development were provided. Finally, this review revealed that the integration of
flexible HENs is a promising technique for energy recovery during ACC. This study will be beneficial to researchers exploring cost-effective methods for designing sustainable energy systems for effective energy
recovery.
