Induction time of Methane Hydrate formation in the presence of electrolyte solutions of sodium chloride and sodium sulfate

توضیحات

Abstract
Devising methods to prevent hydrate formation is of the important issues in natural gas industry. Since a great deal of money is annually spent  on using hydrate inhibitors, identification of new inhibitors with higher degrees of efficacy is economically justifiable. Bearing in mind the significant  ole of hydrate inhibitors in prevention of natural gas pipelines’ getting blocked, the present study attempts to investigate two  ompounds of NaCl and Na2SO4 as inhibitors of hydrate methane’s formation so as to respond to “what is the inhibitive kinetic impact of  lectrolyte compounds of NaCl and Na2SO4 on the formation of methane hydrate?” To do so, this study measures the induction time of  ethane  ydrate crystals in the presence of electrolyte solutions of NaCl and Na2SO4 and compares the results obtained with the state lacking such  inhibitors.

Introduction

Gas hydrate is a compound, which is formed in the presence of water and the guest molecule under the condition of low temperature and high  pressure. After being formed, this stable and tough compound leads to creation of a blockage in natural gas pipelines . In 1810 Devi, an English  chemist, for the first time found out the formation of gas chloral hydrate while cooling an aqueous solution of chlorine in the temperature of 10  degrees centigrade . In 1934, Homer and Schmitt found that the hydrate formed created a blockage in gas pipelines. Thenceforth, Diatom and  Frost were of the early scientists who conducted and reported on empirical experiments on hydrate formation . More serious studies on these  molecules were carried out regarding their crystal structure, properties, and formation conditions as well as ways to inhibit their formation. To  examine kinetic conditions of hydrate formation, Dimo Kashchieva and Abbas Firoozadib investigated correlation of oversaturation with crystal  growth and induction time. Velocity of hydrate growth has been modeled by several researchers through measuring the velocity of gas  consumption at the time of hydrate formation . In addition, various crystallization-based kinetic models have been proposed to predict hydrate  formation conditions; however, validity of these models requires the relevant data on the particle size distribution (PSD) of the gas hydrate .

Year: 2013

Publisher :  2nd National Iranian Conference on Gas Hydrate (NICGH)

By : M.Manteghian ,H.Ahmadi

File Information: English Language/ 8 Page / size: 622 KB

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سال : 1392

ناشر : دومین کنفرانس ملی هیدرات گاز (NICGH)

کاری از : م. مجتهدان، حسن احمدی

اطلاعات فایل : زبان انگلیسی / 8 صفحه / حجم : KB 622

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