مدل‌سازی انتقال جرم در فرایند استخراج اسانس روغنی آویشن و ارزیابی خواص فیزیکی- شیمیایی آن

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه مهندسی شیمی-صنایع غذایی، دانشکده مهندسی شیمی، دانشگاه صنعتی سهند، تبریز، ایران

چکیده

آویشن یکی از داروگیاهانی است که بیشتر به شکل اسانس استفاده می‌شود. اسانس روغنی آویشن از جمله مواد کاربردی و دارای خواصی بی‌همتا است. روش‌های گوناگونی برای استخراج اسانس از مواد گیاهی وجود دارد که در پژوهش پیش رو باتوجه به اهمیت و کاربرد بالای روش تقطیر با آب و بخار، اسانس‌گیری به‌وسیلۀ دستگاه کلونجر، به مدت
2 ساعت انجام شد و بازده استخراج 32/2% (حجمی/ حجمی) بود. در پژوهش پیش رو از مدل ریاضی بر مبنای پدیدۀ انتقال جرم برای پیش‌بینی استخراج اسانس آویشن با استفاده از قانون دوم فیک برای مدل‌سازی انتقال جرم و استخراج اسانس آویشن با استفاده از فرایند تقطیر با بخار استفاده شد. در این مدل از اختلاف غلظت بین دو نقطۀ مختلف و با ضریب نفوذ 11-10×54/4 متر مربع بر ثانیه برای مدل‌سازی استفاده شد. نتایج حاصل از مدل‌سازی ریاضی مطابقت و همپوشانی بسیار مناسب 98% با داده‌های آزمایشگاهی از خود نشان
داد. از تجزیۀ GC-MS برای مشخص‌کردن مواد تشکیل‌دهندۀ اسانس و همچنین ترکیب درصد آنها استفاده شد که دو مادۀ کارواکرول و تیمول بیشترین ترکیب درصد موجود در اسانس بودند. با بررسی خاصیت آنتی‌اکسیدانی اسانس روغنی آویشن استخراجشده، نتایج نشان داد این ماده میزان 1/95% خاصیت آنتی‌اکسیدانی دارد.

کلیدواژه‌ها


عنوان مقاله [English]

Mass Transfer Modeling in the Process of Thyme Essential Oil Extraction and Evaluation of Physico-Chemical Properties

نویسندگان [English]

  • O. Ahmadi
  • H. Jafarizadeh-Malmiri
Sahand University of Technology
چکیده [English]

Thyme (Thymus vulgaris L.) is a medicinal plant which its essential oil has been widely used due to its unique properties. Different extraction methods have been utilized to extract plant essential oil and in the present study, hydro distillation glass-Clevenger apparatus was used for extraction of thyme essential oil for 2 h. Obtained result indicated that thyme essential oil extraction yield was 2.32% (v/v). Furthermore, a mathematical model to predict and model the thyme essential oil extraction curve by Fick’s second law was utilized. This model was established based on difference of the concentration of points and the diffusion coefficient of 4.54×10-11 m2/s. The result of the curve obtained by the proposed mathematical model, fitted very well (98%) with the observed experimental results. Chemical composition assessment of the extracted thyme essential oil using GC-MS technique indicated that thymol and carvacrol are two main bioactive compounds of thyme essential oil. Antioxidant activity of the extracted thyme essential oil was also 95.1%.

کلیدواژه‌ها [English]

  • Antioxidant
  • Mass Transfer
  • Modeling
  • thyme essential oil
 
 
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