کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1266657 1496879 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feasibility of low frequency ultrasound for water removal from crude oil emulsions
ترجمه فارسی عنوان
امکان سنجی فراصوت فرکانس پایین برای حذف آب از امولسیون های نفت خام
کلمات کلیدی
نفت خام، جداسازی نفت خام، درمان اولتراسوند، جداسازی آب، فرکانس پایین فراصوت
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی (عمومی)
چکیده انگلیسی


• Low frequency ultrasound is proposed for crude oil demulsification.
• Indirect application of ultrasound to crude oil emulsions causes demulsification.
• Demulsification efficiencies reached 65% without using chemical demulsifier.
• Ultrasound causes coalescence of emulsified water drops.
• Time of sonication is critical for crude oil demulsification.

The feasibility of indirect application of low frequency ultrasound for demulsification of crude oil was investigated without using chemical demulsifiers. Experiments were performed in an ultrasonic bath with frequency of 35 kHz. Synthetic emulsions with water content of 12%, 35% and 50% and median of droplet size distribution (DSD), median D(0.5), of 5, 10 and 25 μm were prepared from crude oil with API density of 19 (heavy crude oil) and submitted to the proposed ultrasound-assisted demulsification procedure. Experimental conditions as temperature, time of exposition to ultrasound and ultrasonic power were evaluated. Separation of water from crude oil emulsion was observed for all emulsions investigated. Demulsification efficiency up to 65% was obtained for emulsion with 50% of water content and DSD of 10 μm. Higher efficiency of demulsification was achieved using US temperature of 45 °C and ultrasound power of 160 W by 15 min. Results obtained in this study showed that ultrasound could be considered a promising technology for industrial crude oil treatment and respective water removal.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultrasonics Sonochemistry - Volume 25, July 2015, Pages 70–75
نویسندگان
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