However, precisely because there is such a diversity of results and observations, the ordering and categorization of distinct phenomena involving water-lean solvents is the more essential. This multitude of options can render a comprehensive analysis of water-lean solvents and their common properties quite a challenging task.
The reasons for this are manyfold, but perhaps the main culprit is the multitude of possible diluent and amine constituents for water-lean solvent formulation.
More often than not, these studies lack a satisfactory contextualization with the previous body of work. The review reveals the need for standardized framework and optimization algorithms using exergo-economic performance indicators for integrated solvent and process synthesis.Įvery year, a plethora of studies focused on developing water-lean solvents for CO2 capture is published in the scientific literature. A comparative analysis was conducted between the different available schemes in the literature and interactions between solvents and process configurations were showcased, highlighting the advantages and shortcomings of some of them. The process configurations were grouped into absorption and stripping enhancement categories. As there are several reviews dealing with novel solvents, this review critically evaluates the progress in improving the conventional PCC process through modifications of process configurations and shadowed by solvent replacements as drop-in solutions. Changing the solvent or improving the process flowsheet are two main methodologies to achieve higher energetic efficiency and lower exergy losses. As such, reducing the overall parasitic load of the conventional process is of interest. However, the conventional chemical absorption-based PCC process implies high regeneration energy requirements, constituting the majority of the energy load when adding PCC to the plant from which the CO2 is going to be captured. Post-combustion CO2 capture (PCC) is the most mature methodology for large-scale CO2 capture and closest to market. A prime pathway to achieve it in the short-medium term lies within capturing CO2 from industries’ flue gases. Mitigation of climate change by reducing the anthropogenic CO2 emissions has recently gained huge momentum.
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