سبک‌سازی نفت خام سنگین با استفاده ازبیوسورفکتنت رامنولیپید تولید شده از باکتری سودوموناس آئرو جینوزا ATCC28793

نوع مقاله: مقاله پژوهشی

نویسندگان

دانشکده مهندسی شیمی، دانشگاه صنعتی نوشیروانی بابل، مازندران، ایران

چکیده

استفاده از بیوسورفکتنت‌ها به‌جای سورفکتنت‌های شیمیایی در صنعت نفت به لحاظ اثرات زیست محیطی حائز اهمیت می‌باشد. رامنولیپیدها به عنوان یکی از موثرترین بیوسورفکتنت‌ها برای کاهش ویسکوزیته نفت سنگین و به تبع آن افزایش درجه API آن به شمار می‌روند. در این تحقیق ابتدا بیوسورفکتنت رامنولیپید از باکتری سودوموناس آئروجینوزا ATCC28793 استخراج گردید و سپس با استفاده از IR اسپکتروسکوپی و کروماتوگرافی لایه نازک (TLC) شناسایی شد. نتایج به‌دست آمده از ساخت امولسیون‌های آب در نفت نشان داد که ویسکوزیته و درجه API نفت خام سنگین به ترتیب از مقدار اولیه mPa.s 2360 و 18به مقدار نهایی mPa.s 930 و 28 رسید. علاوه بر آن شاخص امولسیون (E24) در غلظت w/v 8% از رامنولیپید 98% بود. آزمایش‌ها نشان داد که امولسیون‌های شاخته شده در pH بین 8 تا14، دمای 30 تا ºC 90 و ماکزیمم غلظت نمک w/v 8% پایدار بودند. قطر متوسط ذرات پخش شده آب در نفت با استفاده از دستگاه DLS اندازه گرفته شد و بین µm 70-50 بود. نتایج به‌دست آمده از این تحقیق نشان داد رامنولیپیدتولید شده توانایی بالایی در کاهش ویسکوزته نفت خام سنگین و افزایش درجه API آن دارد ، بنابراین می تواند جایگزین بسیار مناسبی برای سورفکتنت‌های شیمیایی و سنتزی در صنعت نفت و پتروشیمی و کاربردهای زیست محیطی داشته باشد.
 

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Upgrading of Heavy Crude Oil Using Rhamnolipid Biosurfactant Produced from Pseudomonas Aeroginosa ATCC28793

نویسندگان [English]

  • Morteza Hosseini
  • Hossein Amani
  • Reza Hajimohammadi
Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, Iran
چکیده [English]

Using of Biosurfactants instead of chemical surfactants in oil industry is important in terms of environmental impact. Rhamnolipids is one of the effective Biosurfactants for reducing the viscosity of heavy crude oil and consequently for increasing the API gravity of heavy oil. In this research, Rhamnolipid Biosurfactant was produced from Pseudomonas aeroginosa ATCC28793 and was characterized using thin layer chromatography (TLC) and FTIR spectroscopy. The obtained results from production of water in oil(W/O) emulsions showed that initial viscosity and API gravity of the heavy oil reached from 2360 mPa.s and 18 to 930 mPa.s and 28, respectively. In addition, emulsification index (E24) was found to be %98 in the Rhamnolipid concentration of %8 w/v. During the experiment, it was observed that the emulsions were stable in the pH range of 8 to 14, temperature from 30 to 90˚C and for salinity up to %8 w/v of NaCl solution. The average diameter of W/O droplets which was evaluated by dynamic light scattering (DLS) showed that the average water droplets were in the range of 50-70 µm. The obtained results from the present research reveal that the produced Rhamnolipid has significant ability for reduction of viscosity and increase in  the API gravity of heavy oil; therefore, it can be suitable alternative method instead of synthetic and chemical surfactants in petroleum and oil industry and environmental applications.
 

کلیدواژه‌ها [English]

  • Biosurfactant Rhamnolipid
  • heavy oil
  • Pseudomonas Aeroginosa
  • viscosity
  • Upgrading

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