Acid gas pretreatment for modification of sulfur recovery process and CO2 capturing by optimized liquefaction process

Vahid Pirouzfar and Chia-Hung Su

Energy, 2025, vol. 335, issue C

Abstract: The integration of more intricate processes, including Acid Gas Enrichment (AGE) and the liquefaction of CO2, has been scrutinized to more effectively separate H2S for transfer to the Sulfur Recovery Unit (SRU) and to capture CO2 by the Aspen Process Economic Analyzer (APEA). The simulation results were optimized and statistically analyzed using Response Surface Methodology (RSM). The maximum H2S composition, weight percentage of H2S content in the acid gas stream to the SRU, and liquefied CO2 discharge mass flow rate in the experiments was 887,567 ppm, 84.82 %, and 2211.98 kg/h, respectively. The economic analysis evaluated the capital cost of the natural gas sweetening process, AGE, and the integration of these processes with CO2 liquefaction in both elementary and optimized states, amounting to 16,173,594, 31,614,232, 52,440,322 and 51,715,847 USD, respectively. Further studies on the simultaneous processes of natural gas sweetening, SRU in flow enhancement and CO2 capture can improve the productivity of these units and lead to better designs in natural gas purification.

Keywords: Sulfur recovery; Absorption; CO2 capture; Separation; Liquefaction (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:335:y:2025:i:c:s0360544225034917

DOI: 10.1016/j.energy.2025.137849

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