ارتقای فعالیت مایعات یونی دوقلوی فعال سطحی در فصل مشترک نفت خام و آب

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه شیمی کاربردی، دانشکده شیمی، دانشگاه بوعلی سینا، همدان، ایران

2 گروه شیمی آلی، دانشکده شیمی، دانشگاه بوعلی سینا، همدان، ایران

10.22078/pr.2020.4130.2874

چکیده

طی سال‌های اخیر، مایعات یونی دوقلو، به‌عنوان دسته جدیدی از مواد فعال سطحی، توجه زیادی را به‌خود جلب نموده است. استفاده از این مواد برای کاهش کشش بین سطحی نفت خام- آب و افزایش بازیابی نفت دارای مزایای زیادی است. در این پژوهش، به بررسی تأثیر غلظت، دما و pH بر کشش بین سطحی نفت خام -آب در حضور مایعات یونی دوقلوی فعال سطحی با طول زنجیره هیدروکربنی متفاوت پرداخته می‌شود. بدین منظور، دو مایع یونی دوقلوی فعال سطحی بر پایه ایمیدازولیوم، با علائم اختصاری [C4im-C4-imC4][Br2] و [C8im-C4-imC8][Br2]، سنتز و مورد استفاه قرار گرفتند. با اندازه‌گیری کشش بین سطحی، تحت شرایط مختلف، تغییرات مربوطه مد نظر قرار گرفتند. نتایج نشان داد که کاهش کشش بین سطحی به‌شدت به طول زنجیره هیدروکربنی مایعات یونی و غلظت وابسته بوده و بیشترین درصد کاهش کشش بین سطحی به‌ترتیب به‌میزان 5/72 و 5/97% در غلظت بحرانی تشکیل مایسل و در دمای K 2/298 حاصل شد. مایعات یونی دوقلوی فعال سطحی در دمای بالا و در گستره وسیعی از pH پایدار بوده و افزایش هر یک از این عوامل باعث ارتقای عملکرد مایعات یونی می‌گردد. در بررسی نظری، معلوم شد که داده‌های تجربی با ایزوترم جذب سطحی فرومکین مطابقت داشته و پارامترهای به‌دست آمده دارای روند تغییرات منطقی هستند
 

کلیدواژه‌ها


عنوان مقاله [English]

Promoting Activity of Gemini Ionic Liquids Surfactant at the Interface of Crude Oil-water

نویسندگان [English]

  • Mona Kharazi 1
  • Javad Saien 1
  • Meysam Yarie 2
  • Mohammad Ali Zolfigol 2
1 Department of Applied Chemistry, Bu–Ali Sina University, Hamedan, Iran
2 Department of Organic Chemistry, Bu-Ali Sina Unversity, Hamedan Iran
چکیده [English]

During recent years, Gemini ionic liquids (ILs), as a new type of surfactants, have gained much attention due to their significant interfacial activity. Accordingly, use of these materials to reduce crude oil-water interfacial tension (IFT) and to enhance oil recovery is much advantageous. In this study, effects of concentration, temperature and pH on the crude oil-water IFT in the presence of Gemini IL surfactants were investigated. For this aim, alkyl chain length imidazolium based gemini ILs of [C4im-C4-imC4][Br2] and [C8im-C4-imC8][Br2] were synthesized and used. By measuring IFT of the system, under different conditions, the corresponding variations were considered. Results revealed the strong effect of alkyl chain length and concentration on the IFT, leading to, respectively, 72.5 and 97.5% reductions under critical micelle concentrations and temperature of 298.2 K. The Gemini IL surfactants were stable at high temperatures and under a wide range of pH, and that their performance was significantly promoted with these factors. In theoretical investigation, it was revealed that the experimental data were nicely consistent with the Frumkin adsorption isotherm and the obtained parameters with reasonable variations.
 

کلیدواژه‌ها [English]

  • Imidazolium gemini ionic liquids
  • Interfacial Tension
  • EOR
  • Alkyl chain length
  • Crude Oil
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