فصلنامه علمی کارافن

فصلنامه علمی کارافن

ذرات مغناطیسی میکرونی پوشیده با اسید اولئیک به‌منظور حذف نمک از نفت خام، شناسایی پارامترهای تأثیرگذار

نوع مقاله : مقاله پژوهشی (کاربردی)

نویسندگان
1 دانشکده مهندسی شیمی، نفت و گاز، دانشگاه فنی و حرفه‌ای، تهران، ایران.
2 دانشکده مهندسی مواد و متالوژی، دانشگاه فنی و حرفه‌ای، تهران، ایران.
3 استادیار دانشکده مهندسی شیمی، دانشگاه آزاد اسلامی واحد داراب، داراب، ایران.
چکیده
نفت خام تولیدشده از مخازن نفتی حاوی مقادیر زیادی آسفالتین، رزین، اسیدهای نفتنیک و ذرات جامد است که منجر به تشکیل امولسیون پایدار آب شور در نفت می­شود. اگر فاز آب شور پراکنده از نفت خام جدا نشود، می‌تواند فرایند پالایشگاه را به‌طور جدی مختل کند. در این مطالعه، یک نفت خام شامل قطرات آب نمک پراکنده (امولسیون پایدار)، بر اساس افزایش وزن قطرات پراکنده آب، توسط ذرات میکرونی مغناطیسی پوشش‌یافته با اسید اولئیک امولسیون‌زدایی یا به عبارتی نمک‌زدایی می­شود. این روش جدید در مقایسه با روش‌های متداول مغناطیسی، الزاماً نه نیازی به اعمال میدان مغناطیسی و نه نیازی به یک افزودنی فعال سطحی دارد. اثر مغناطیسی امولسیون‌زدا منحصراً می‌تواند برای بازیابی خود آن استفاده شود. اثر هشت عامل شامل زمان استراحت، دما، اسیدیته، زمان اختلاط، ترشوندگی، سرعت اختلاط، غلظت نمک و غلظت امولسیون‌زدا بر راندمان حذف آب با یک طراحی غربالگری (Screening Design) بررسی و ارزیابی گردید. نتایج نشان داد که تمامی عوامل ذکرشده، مؤثر هستند ولیکن، زمان استراحت، اسیدیته و دما از اهمیت بیشتری برخوردار بودند. این روش با نرخ آبگیری بالا، بسیار کارآمد است و کاربردهای بالقوه زیادی برای مصارف تجاری و صنعتی دارد.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Application of Micron-sized Oleic-acid Covered Magnetite Particles in Co-sedimentation-demulsification of Water in Crude Oil Emulsion: identification of effective parameters

نویسندگان English

Mehdi Ghanbari 1
Seyed Mohammad Jesmani 2
Kobra Salehi 3
1 Department of Chemical, Petroleum and Gas Engineering, Technical and Vocational University (TVU), Tehran, Iran.
2 Department of Material and Metallurgical Engineering, Technical and Vocational University (TVU), Tehran, Iran.
3 Department of Chemical Engineering, Darab Branch, Islamic Azad University, Darab, Fars, Iran.
چکیده English

Produced crude oil from oil reservoirs contains enormous amounts of asphaltenes, resins, naphthenic acids and solid particles leading to the formation of stable salty water in oil emulsion. This can seriously disrupt the refinery process if the dispersed salty water phase is not separated from the crude oil. In this study, a wetted crude oil was dehydrated based on the increased weight of the dispersed droplets using the micron-sized oleic-acid-covered magnetite particles. This method does not necessarily require applying the magnetic field for the demulsification nor uses a surface-active additive. The magnetic responsivity of the demulsifier can exclusively be utilized to recover the demulsifier. The effect of eight factors including rest time, temperature, pH, mixing time, magnetic wettability, mixing rate, salinity and the demulsifier dosage were evaluated on water removal efficiency. The results revealed that all of the mentioned factors were important; however, rest time, pH and temperature were more important. This method has a high dehydration rate and great potential applications for commercial and industrial use.

کلیدواژه‌ها English

Magnetic Demulsifier Emulsion Interface Co
sedimentation Demulsification Separation
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دوره 21، شماره 3
فنی و مهندسی
پاییز 1403
صفحه 455-476

  • تاریخ دریافت 13 آبان 1402
  • تاریخ بازنگری 16 اسفند 1402
  • تاریخ پذیرش 13 خرداد 1403