استفاده از نانوکامپوزیت گرافنی مغناطیسی عامل‌دار شده با مایع یونی در گوگردزدایی

نوع مقاله : مقاله پژوهشی

نویسنده

گروه تجزیه و ارزیابی مواد، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

از آغاز انقلاب گرافن در سال 2004، این ماده توجه زیادی را به خود جلب کرده است و ویژگی‌های فیزیک و شیمیایی منحصر به فرد آن، امیدهای بسیاری برای استفاده از این ماده در زمینه‌های مختلف به وجود آورده است. همچنین نانوذرات مغناطیسی که به سادگی توسط یک آهن‌ربا از محیط جدا می‌شوند، راهکار جدیدی در حذف آلاینده‌ها به حساب می‌آیند. در این تحقیق، مزایای آهن گرافن با جداسازی آسان نانوذرات مغناطیسی ترکیب شده و پس از عامل‌دار شدن با مایع یونی، از نانوکامپوزیت مغناطیسی گرافنی حاصل به منظور گوگردزدایی از بنزین استفاده شد. ساختار نانو کامپوزیت تهیه شده با دستگاه‌های مختلف بررسی گردیده و عوامل مؤثر بر فرآیند گوگردزدایی بهینه شد. مطالعات سینتیکی و ترمودینامیکی به منظور بررسی مکانیسم حذف انجام گرفت. نتایج نشان داد که تحت شرایط بهینه، 58% تیوفن طی minا20 حذف می‌شود و با تکرار مراحل حذف تا چهار مرتبه می‌توان به گوگردزدایی عمیق رسید. بررسی داده‌های ترمودینامیکی جذب نشان داد که جذب سطحی از مدل لانگمویر تبعیت می‌کند. بنابراین، جذب بر تک لایه‌ای از سطح همگن نانوکامپوزیت صورت می‌گیرد. حداکثر ظرفیت جذب mgا 113 تیوفن به ازای grا1 نانوکامپوزیت محاسبه شد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Application of Magnetic Graphene-based Nanocomposite Functionalized with Ionic Liquid for the Sulfur Removal from Gasoline

نویسنده [English]

  • Tahereh Poursaberi
Analysis and Evaluation Of Materials Group, Research Institute of Petroleum Industry, (RIPI), Tehran, Iran
چکیده [English]

Since the start of the graphene revolution in 2004, it has captured increasing attention and has shown great promise in many applications arising from its unique physicochemical properties. On the other hand, magnetite nanoparticles which separate the materials based on magnetic properties have attracted great attention. Herein, the magnetic properties of the magnetite nanoparticles and the high adsorption capacity of graphene are combined to fabricate a new nanocomposite for the removal of sulfur compounds from gasoline. The synthesized nanocomposite was characterized by several techniques and effective parameters were optimized. The kinetic and thermodynamic data of the adsorption process were analyzed to clarify the mechanism of adsorption. The results showed that under optimal conditions, 58% of thiophen was removed in 20 min and deep desulfurization could be achieved during 4 cycles. The isothermal data conformed well to the Langmuir model, and thus a monolayer adsorption occurred on a homogeneous nanocomposite surface. The maximum sorption capacity of the nanocomposite for thiophene was 113 mg.g-1.

کلیدواژه‌ها [English]

  • Nanocomposite
  • Graphene
  • Magnetic Nanoparticles
  • Ionic liquid
  • Desulfurization
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