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Ghareghashi, Abbas, Ghader, Sattar, Moradian, Mojtaba. (1403). Modifying GMA equation of state for accurate calculation of natural gas and LNG thermophysical properties at low and high pressure. نشریه علمی دانشگاه سیستان و بلوچستان, (), -. doi: 10.22111/cpd.2024.50157.1043
Abbas Ghareghashi; Sattar Ghader; Mojtaba Moradian. "Modifying GMA equation of state for accurate calculation of natural gas and LNG thermophysical properties at low and high pressure". نشریه علمی دانشگاه سیستان و بلوچستان, , , 1403, -. doi: 10.22111/cpd.2024.50157.1043
Ghareghashi, Abbas, Ghader, Sattar, Moradian, Mojtaba. (1403). 'Modifying GMA equation of state for accurate calculation of natural gas and LNG thermophysical properties at low and high pressure', نشریه علمی دانشگاه سیستان و بلوچستان, (), pp. -. doi: 10.22111/cpd.2024.50157.1043
Ghareghashi, Abbas, Ghader, Sattar, Moradian, Mojtaba. Modifying GMA equation of state for accurate calculation of natural gas and LNG thermophysical properties at low and high pressure. نشریه علمی دانشگاه سیستان و بلوچستان, 1403; (): -. doi: 10.22111/cpd.2024.50157.1043

Modifying GMA equation of state for accurate calculation of natural gas and LNG thermophysical properties at low and high pressure

Chemical Process Design
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 31 خرداد 1403
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22111/cpd.2024.50157.1043
نویسندگان
Abbas Ghareghashi* 1؛ Sattar Ghader2؛ Mojtaba Moradian2
1Department of Chemical Engineering, Engineering Faculty, Velayat University, Iranshahr, Iran
2Department of Chemical Engineering, College of Engineering, Shahid Bahonar University of Kerman, Jomhoori blvd., Post Code 76175, Kerman, Iran
چکیده
The main concern of this paper is to improve the GMA equation of state,

which has been used for density calculation of liquids with excellent accuracy, for calculation of density and other thermophysical properties of natural gas. In other words, as GMA equation of state cannot calculate accurately the density of components in gas region it is modified in a new form. This new form is capable of calculating densities of substances in liquid and gaseous state. GMA equation of state is based on intermolecular potential energy, therefore, the potential energy of the GMA equation of state is corrected and a modified equation of state is obtained which can calculate thermophysical properties in gas as well as liquid region. The final form of the new equation of state, is a regularity between (Z-1)ν^3 and ρ at all temperatures, which is obtained by (9, 6, 3) Lennard-Jones potential. Natural gas density, heat capacity and second viral coefficient are calculated by new equation of state which is named isotherm regularity equation of state (IR EOS). The capability of the new equation of state is examined by comparing its results with experimental data, PR EOS, and GERG EOS from low to high pressures. The new equation of state gives excellent results for calculating density of natural gas and LNG while it reproduces other thermophysical properties with lower accuracy.
کلیدواژه‌ها
natural gas؛ LNG؛ density؛ isotherm regularity؛ high pressure؛ heat capacity
آمار
تعداد مشاهده مقاله: 39


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