Integrated Environmental, Economic, and Safety-based Optimization of Industrial Carbon Capture Process

Swaprabha P. Patel, Piyush B. Vanzara, Ashish M. Gujarathi

Abstract


Natural gas is a vital component of global energy supply. Methane (C1) is the chief component of natural gas, accounting for 80-85 mol% of its composition, with some other light alkanes present. In natural gas, other compounds in the mixture are undesirable because they contribute to corrosion, especially in piping systems and equipment, due to the gas's inherent water saturation. Moreover, the presence of CO2 in natural gas prevents it from meeting the heating value requirement, thereby failing to meet the quality standards for natural gas. In this work, the carbon capture process in industry is multi-objectively optimized with respect to three objectives: environmental (global warming potential (GWP)), economic (return on investment (ROI)), and safety (damage index). In total, eight decision variables are considered, subject to two constraints related to CO2 and H2S concentrations. In the initial segment (from solution X to Y), the feed pressure increases by 53%, the feed gas temperature decreases by 29%, the reboiler pressure decreases by 38%, the feed molar flow decreases by 18%, and the lean amine temperature decreases by 27%. This rise in feed flow results in a significant increase in ROI to 46.9%.

Keywords


Carbon capture; NSGA-II; Promax; Optimization; Global warming potential.

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References


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DOI: http://dx.doi.org/10.52155/ijpsat.v58.2.8581

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