IJE TRANSACTIONS C: Aspects Vol. 27, No. 9 (September 2014) 1325-1330    Article Under Proof

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R. Davarnejad, Jam. Azizi and Jab. Azizi
( Received: August 16, 2013 – Accepted: May 22, 2014 )

Abstract    Gas hydrates attracted worldwide attention due to their potential as huge energy resource in the recent decades. Effective parameters which influence the formation of hydrates are high pressure, low temperature and water presence. HYSYS software is one of the major simulators which are widely used in the chemical and thermodynamic processes. This research was conducted to simulate gas hydrate formation of Lavan-3 gas well and Salman gas field using the HYSYS software. The steady state simulation of hydrate formation was performed by the Peng-Robinson equation of state. The data were compared with the experimental ones. It was concluded that the HYSYS is able to predict hydrate formation, properly (Average Absolute Error<1). Two novel correlations were also developed to estimate hydrate formation conditions of natural gas.


Keywords    Gas hydrates, HYSYS, Peng-Robinson, Simulation


چکیده    در دهه های گذشته هیدرات های گازی به خاطر پتانسیل بالا در تامین منابع عظیم انرژی توجه جهانی را به خود منعطف کرده اند. عوامل تاثیرگذار بر روی تشکیل هیدرات گازی عبارت اند از: فشار بالا، دمای پایین و حضور آب. نرم افزار هایسیس یکی از بهترین شبیه ساز هایی است که در فرآیند های شیمیایی و ترمودینامیکی مورد استفاده قرار می گیرد. در این تحقیق سعی شده است با استفاده از نرم افزار هایسیس شرایط تشکیل هیدرات گازی در چاه گازی لاوان-3 و همچنین میدان گازی سلمان در شرایط پایا و با استفاده از معادله حالت پنگ رابینسون بررسی گردد. داده های بدست آمده از شبیه سازی با نتایج آزمایشگاهی مورد مقایسه قرار گرفت و خطای بدست آمده کمتر از 1درصد مشاهده شد که نشان از دقت بالای نرم افزار مورد اشاره در بررسی شرایط تشکیل داشت. در پایان دو معادله ی جدید برای پیش بینی شرایط تشکیل هیدرات گازی در گاز طبیعی پیشنهاد شد



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