تهیه و شناسایی نانو ذرات روی اکسید دوپه شده با کبالت به روش مایکروویو و کاربرد آن به عنوان کاتالیزگر برای تولید بیودیزل از روغن سویا

نوع مقاله : مقاله علمی پژوهشی

نویسندگان

1 گروه شیمی معدنی، دانشکده شیمی، دانشگاه مازندران، بابلسر، ایران

2 گروه شیمی کاربردی، دانشکده شیمی، دانشگاه مازندران، بابلسر، ایران

چکیده

امروزه سوخت بیودیزل به عنوان یکی از منابع اصلی برای جایگزینی سوخت‌های فسیلی در حال تولید و مصرف در سراسر دنیا است. در این پژوهش از روی اکسید دوپه شده با کبالت به عنوان نانوکاتالیزگر برای تولید بیودیزل از روغن سویا به روش تبادل استری استفاده شده است. در ابتدا نانوکاتالیزگرهای مورد استفاده با روش مایکروویو تهیه شدند و به وسیله‌ی روش‎های پراش اشعه ایکس (XRD)، میکروسکوپ الکترونی روبشی (SEM) و طیف بینی انرژی پخش اشعه ایکس (EDS) شناسایی گردیدند. در مرحله بعد کاتالیزگرهای تهیه شده در واکنش تولید بیودیزل از روغن سویا مورد استفاده قرار گرفتند. بیودیزل تولید شده با استفاده از طیف سنجی رزونانس مغناطیسی هسته‌ (NMR) و کروماتوگرافی گازی –طیف نگار جرمی (GC-MS) شناسایی شده است. شرایط بهینه واکنش تولید بیودیزل با نانوکاتالیزگر روی اکسید دوپه شده با کبالت، در زمان 3 ساعت، دمایC ˚ 60، غلظت کاتالیزگر 3% وزنی و نسبت مولی روغن به متانول 1 به 41 به درصد تبدیل 98%منجر شد. در بخش دیگری از این پژوهش، از تابش مایکروویو با توان 250 وات به عنوان منبع تامین انرژی در واکنش تولید بیودیزل استفاده گردید که در حضور 4% وزنی کاتالیزگر و نسبت مولی روغن به متانول 1 به 20 منجر به درصد تبدیل 91% در 180 ثانیه شد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Synthesis and characterization of cobalt doped zinc oxide nanoparticles by microwave method and its application as catalyst for biodiesel production from soybean oil

نویسندگان [English]

  • Mahdieh Mohsenpour 1
  • Hamid Emadi 2
  • Hamid Golchoubian 1
1 Department of Inorganic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
2 Department of Applied Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
چکیده [English]

Today, biodiesel is being produced and consumed around the world as one of the main sources for replacing fossil fuels. In current research, cobalt doped zinc oxide was used as nanocatalyst to produce biodiesel from soybean oil by transesterification reaction. The nanocatalysts used were first prepared by microwave method and identified by X-ray diffraction (XRD), scanning electron microscopy (SEM) and x-ray energy dispersive spectroscopy (EDS). In the next step, the prepared catalysts were used in the reaction of biodiesel production from soybean oil. The produced biodiesel was characterized using nuclear magnetic resonance spectroscopy (NMR) and gas chromatography-mass spectroscopy (GC-MS). Optimal reaction conditions of biodiesel production with cobalt doped zinc oxide nanocatalyst obtained, at 3 h, temperature 60 ˚C, catalyst concentration 3% by weight, and molar ratio of oil to methanol 1 to 41 resulted in 98% efficiency. In another part of this research, microwave radiation with a power of 250 W was used as a source of energy in the biodiesel production reaction which in the presence of 4% by weight of catalyst and molar ratio of oil to methanol 1 to 20 resulted in 91% efficiency in 180 s.

کلیدواژه‌ها [English]

  • Biodiesel
  • Transesterification
  • Microwave
  • Nanocatalyst

This is an open access article under the CC-BY-SA 4.0 license.( https://creativecommons.org/licenses/by-sa/4.0/)

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