Evaluation of various types equations of state for prediction of rate of hydrate formation based on Kashchiev and Firoozabadi model in the presence or absence of kinetic hydrate inhibitors for gasous mixtures in a recirculating systems

Publish Year: 1392
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

NICGH02_005

تاریخ نمایه سازی: 25 شهریور 1392

Abstract:

This paper compares the effects of using various types of equations of state such as Peng Rabinson(PR), Predictive Soave Ridlich Kowng (PSRK), Benedict–Webb–Rubin-Starling (BWRS), Nasrifar-Boland(NB), and Valderrama -Patel -Teja (VPT) on rate of double gas hydrate formation based on the Kashchiev and Firoozabadi model for gaseous mixtures such as 65% C1/35 %C3, 35% C1/65% C3, 65% C1/35 % i-C4, 35% C1/65% i-C4 with experimental data points obtained in a flow mini-loop apparatus with or without the presence of kinetic inhibitors at various pressures and specified temperature. For the prediction of the gas consumption rate for double gas hydrate formation in a flow mini-loop apparatus, the rate equation based on the Kashchiev and Firoozabadi model for simple gas hydrate formation in bench scale was developed. The TAAD% was found to be 18.6 %, 18.8 %, 19.8%, 20.2% and 20.7% for the PR, NB, PSRK, VPT and BWRS equations of state for calculating gas consumption in double gas hydrate formation in the presence and absence of kinetic hydrate inhibitors, respectively. Comparison results between the calculated and experimental data points of gas consumption indicate that the PR and NB equations of state have lower errors than the PSRK, VPT and BWRS equations of state for this model

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Mohammad Reza Talaghat

Department of Chemical Engineering, Petroleum and gas, Shiraz University of Technology

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