Phase equilibrium for hydrate formation in the Methane and Ethane system and effect of inhibitors
محل انتشار: مقالات مروری و پژوهشی شیمی، دوره: 5، شماره: 1
سال انتشار: 1401
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 136
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شناسه ملی سند علمی:
JR_CHRL-5-1_001
تاریخ نمایه سازی: 23 فروردین 1401
چکیده مقاله:
Gas hydrates form at various facilities related to the natural gas and process equipment in oil and gas fields, refineries, petrochemical and facilities in the chemical industry, in the presence of both natural gas and water, at high pressure and low temperature. In the present study, the equilibrium conditions of gas hydrate mixture formation including methane and ethane and also pure ethane are investigated. The conditions for binary hydrate formation without the presence of inhibitors have been used and the empirical research available in the field has been used to evaluate the accuracy of the present modeling. Hydoff software was used for modeling and the hydrate formation pressure was calculated. In order to evaluate the accuracy of the modeling, the values related to the calculation error were calculated from the existing experimental research and the results showed that there are ۱۱%, ۱۴% and ۰.۰۸% errors with Deaton & Frost, McLeod & Campbell, Holder & Grigoriou research, respectively. Therefore, it can be concluded that the best case for modeling according to the experimental results is Holder & Grigoriou, and therefore a mathematical model is presented to estimate the formation conditions of the binary mixture of methane and ethane, which can be used with very high accuracy. Pure ethane was also tested with potassium chloride, sodium chloride and ۵% methanol inhibitors and also without inhibitors and the results showed that the effect of adding methanol is greater than sodium chloride and potassium chloride, respectively, and ethane hydrate is formed at higher pressures.
کلیدواژه ها:
نویسندگان
Sajjad Porgar
Department of Chemical Engineering, Islamic Azad University, Tehran, Iran
Nejat Rahmanian
Department of Chemical Engineering, University of Bradford, Bradford, BD۷ ۱DP, United Kingdom.