Despite the suggested applications for gas hydrate in transportation and storage of natural gas, desalination of water, etc., there has been no applied industrial application for it. There are several patents and papers on thermodynamically and kinetically promotion of gas hydrate formation and many concerning its related processes. In designing a process based on gas hydrate application in industry, one must include the following operations: formation, separation, pelletizing, storage, transportation and gasification. In this review, operations of each gas hydrate’s application are studied and processes for formation, separation and pelletizing of gas hydrate are widely discussed. Gas hydrates formation systems are classified based on contact type of gas and liquid. Autoclave, spray, bubble column, using micro bubbles, hydrate formation with emphasis on nucleation sites and gas ice process are discussed as hydrate formation systems. Separation of gas hydrate and unreacted water is a solid-liquid separation process which is done by operations based on density difference (using gravity force or centrifugal force) or mechanical separation such as filtration. Pelletizing of gas hydrate with more storage gas capacity and less decomposing rate has been accomplished by piston and cylinder or roller systems.
Gas hydrates are solid crystals, trapping gas molecules in cages constructed by hydrogen bonds. Methane, ethane, propane, butane, carbon dioxide and hydrogen sulfide are some examples of hydrate former gases . Earlier gas hydrate researches were focused on issues that hydrate formation caused in hydrocarbon transportation lines. The goal was to find ways to inhibit hydrate formation and solving safety and processing problems associated with that . Studies showed that gas hydrate has a high potential for storage of natural gas, water desalination, oncentration of solutions and separation of gases also according to considerably high crystallization enthalpy of hydrate formation it can be used in cooling systems . Another application for gas hydrate is natural gas transportation and it’s been evaluated to be more economical than LNG . Gas hydrate potential for industrial applications encourage researchers to find more practical production methods and therefore many patents have been granted in gas hydrate processes and apparatuses for formation, separation and pelletizing systems.
Publisher : 2nd National Iranian Conference on Gas Hydrate (NICGH)
By : Amir Erfani, Milad Muhammadi, Soheil Asgari Neshat, Farshad Varaminian
File Information: English Language/ 15 Page / size: 0.99 KB
سال : 1392
ناشر : دومین کنفرانس ملی هیدرات گاز (NICGH)
کاری از : امیر عرفانی، میلاد محمد، سهیل عسگری نشاط، فرشاد ورامینین
اطلاعات فایل : زبان انگلیسی / 15 صفحه / حجم : KB 0.99