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A new approach of CO_(2)separation by applying rapid expansion of supercritical CO_(2)rich natural gas

Petroleum Research 2023年第1期8卷 71-76页

作者： Saripudin Tutuka Ariadji Sanggono Adisasmito Leksono Mucharam doddy abdassah Department of Petroleum Engineering Faculty of Mining and Petroleum TechnologyBandung Institute of TechnologyJl.Ganesha No.10Bandung40132Indonesia Department of Chemical Engineering Faculty of Industrial TechnologyBandung Institute of TechnologyJl.Ganesha No.10Bandung40132Indonesia Department of Chemical Engineering Politeknik Negeri BandungJl.CiwarugaBandung40559Indonesia

The previous methods for CO_(2)separation from CO_(2)rich natural gas led to expensive production costs.This work was implemented to overcome the problems utilizing a new approach economically.The cooling and rapid expansion processes were integrated for the CO_(2)separation from CO_(2)rich natural gas on the supercritical condition.The experimental apparatus was newly constructed to perform the experiments,and the results were simulated using a various equation of state.The result reveals that the inlet temperature of supercritical expansion diminished the outlet temperature and the gas condensed easily.The simulation indicated that the 70%CO_(2)in natural gas was condensed easier than 45%CO_(2).We found that the outlet temperature of42C and the vapor fraction of 0.69 was attained at the CO_(2)composition of 70%.Besides,the pressure drop change influences the vapor fraction at various CO_(2)compositions.The vapor fraction under supercritical diminished significantly compared with the nonsupercritical condition.The expansion coefficient determined utilizing the equation of state escalates by the enhancement of expansion inlet temperature based on CO_(2)composition in natural gas.The acid gas equation of state was the perfect equation to estimate the expansion coefficient with the absolute average error of 4.83%.This work suggests that the CO_(2)separation from CO_(2)rich natural gas with the cooling and rapid expansion method promotes the new approach to overcome the disadvantages of previous methods.

关键词： Rich natural gas CO_(2)separation Supercritical Cooling Rapid expansion

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