Industrial & Engineering Chemistry Research, Vol.53, No.45, 17705-17721, 2014
Novel LNG-Based Integrated Process Configuration Alternatives for Coproduction of LNG and NGL
In this study, three novel process configurations for coproduction of LNG and NGL are introduced and analyzed. C3-MR, DMR, and MFC refrigeration systems are used for supplying the required refrigeration. High ethane recovery (90+%) and low specific power (0.4 kW-h/kg-LNG) for typical natural gas feed compositions are two of the basic characteristics of the proposed configurations. The proposed processes as compared to the conventional natural gas liquefaction processes are simple and operable. Four or five multi stream heat exchangers and one demethanizer column are utilized for coproduction of LNG and NGL. Also, the analysis shows that performance of the processes is efficient and comparable with similar cases.