بررسی و ارزیابی خواص دی‌الکتریک بیودیزل کرچک با استفاده از امواج مایکروویو

نوع مقاله: مقاله پژوهشی

نویسندگان

1 گروه مهندسی مکانیک بیوسیستم، دانشگاه تربیت مدرس، تهران، ایران

2 /گروه مکانیک بیوسیستم، دانشکده کشاورزی، دانشگاه تربیت مدرس.

3 مهندسی برق، مرکز تحقیقات مخابرات ایران، تهران

چکیده

گرایش به تحقیق پیرامون تولید و کاربرد انرژی­های تجدیدپذیر، ازجمله بیودیزل، به­منظور کاهش گاز­های گلخانه­ای و آلایندگی­های ناشی از سوخت­های فسیلی، یکی از مهم­ترین مواردی است که در سیاست­های جهانی به آن پرداخته شده است. خواص دی­الکتریک (έ، ثابت دی الکتریک و ″ε، فاکتور اتلاف دی الکتریک) مواد نقش عمده­ای در طراحی سامانه مایکروویو و فرایند تولید و فرآوری بیودیزل دارند.هدف از این پژوهش بررسی و ارزیابی خواص دی­الکتریک بیودیزل کرچک در مقیاس آزمایشگاهی با استفاده از فناوری پیشرفته مایکروویو و بررسی ارتباط بین پارامترهای مختلف موثر آن است. در این تحقیق، اثرات زمان واکنش (1، 3 و 9 دقیقه)، غلظت کاتالیزور (1، 1/5 و 2 درصد وزن روغن) و تغییرات دما (30، 45 و 60 درجه سلسیوس) مورد مطالعه قرار گرفت. از سامانه بازتابش پروب در فرکانس MHz 2450 برای اندازه­گیری خواص دی­الکتریک استفاده شد. نتایج نشان داد که با افزایش زمان واکنش و کاهش دما، مقادیر ثابت دی­الکتریک افزایش و با کاهش غلظت کاتالیزور، دما و زمان واکنش، فاکتور اتلاف دی­الکتریک کاهش می­ یابد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Dielectric Properties of Castor-based Biodiesel Using Microwave

نویسندگان [English]

  • Mohammad Zarein 1
  • Mohammad Hadi Khoshtaghaza 2
  • Hossein Ameri Mahabadi 3
1 Mechanical & Biosystems Engineering, Tarbiat Modares University (TMU), Tehran, Iran
2 Biosystem Engineering Dept., College of Agriculture, Tarbiat Modares University
3 Electrical Engineering Department, Iran Telecommunication Research Center (ITRC), Tehran, Iran.
چکیده [English]

The tendency toward research on the production and application of renewable energy, such as biodiesel, to reduce greenhouse gases and emissions of fossil fuels, is one of the most important issues in the world policies which has been discussed. Dielectric properties (ε’, dielectric constant and ε", dielectric loss factor) of materials play a major role in the microwave design and process of biodiesel production. The purpose of this research is to investigate and evaluate the biodiesel's dielectric properties in a pilot-scale using microwave technology and the relationship between its various effective parameters. In this study, the effects of reaction time (1, 3 and 9 minutes), catalyst concentration (1, 1.5 and 2% of oil weight) and temperature changes (30, 45 and 60°C) were studied. The probe reflection system was used at a frequency of 2450 MHz to measure the dielectric properties. The results showed that, with increasing reaction time and decreasing temperature, the dielectric constant values increased, and by decreasing catalyst concentration, temperature and reaction time, the dielectric loss factor decreased.
 
 

کلیدواژه‌ها [English]

  • : Castor Biodiesel
  • production process
  • Dielectric properties
  • Frequency
  • Catalyst
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