نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناس ارشد، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران

2 استادیار، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد آیت‌الله آملی، آمل، ایران

3 دانشیار، گروه مهندسی شیمی، دانشکده فنی مهندسی، دانشگاه آزاد اسلامی واحد علوم و تحقیقات، تهران، ایران

4 دانشیار، گروه مهندسی شیمی، دانشکده فنی مهندسی، واحد قائم‌شهر، دانشگاه آزاد اسلامی، قائم‌شهر، ایران

چکیده

سولفور یکی از عناصر موجود در سوخت های فسیلی است که در هنگام احتراق در موتور خودرو به سولفور دی­اکسید، که یکی از مهم­ترین آلاینده­های هواست، تبدیل می­شود. در پژوهش حاضر ظرفیت جذب یک ترکیب سولفور­دار ارگانیک از یک مدل سوخت گازوئیل محتوی ppm 300 تیوفن، روی زئولیت x13 اصلاح‌شده با 3% وزنی فلزات مس ارزیابی شد. همچنین تأثیر سه پارامتر زمان تماس (15، 30، 60، و min 120)، مقدار جاذب (5/0، 1، 5/2 وg  5/3) و دما (25، 40، 50 و °C 60) در یک سیستم ناپیوسته بررسی شد. به­منظور فعال­سازی کاتیون­های سطح جاذب، زئولیت x13 با آب دیونیزه و نمک M 1/0 مس نیترات شسته و پس از آن نانوذرات مس بر روی آن بارگزاری شد. بیش­ترین ظرفیت جذب در مدت‌زمان min 60، با مقدار g 5/2 جاذب و در دمای محیط صورت گرفت و بر اساس آن مقدار تیوفن برای جاذب­ اصلاح‌شده با نانوذرات مس از 300 به ppm 138 رسید. نتایج جذب نشان داد که افزایش بیش از g 5/2 جاذب در راندمان جذب تغییر محسوسی ایجاد نخواهد کرد. علاوه بر این، مطالعات FT-IR،  SEM و N2 physisorption نشان داد که جاذب ساختار منظم خود را پس از بارگذاری نانوذرات حفظ خواهد کرد. درنهایت زئولیت اصلاح‌شده عملکرد بهتری جهت سولفورزدایی از مدل سوخت گازوئیل از خود نشان داد. 

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of the Performance of Zeolitic Adsorbent Modified with Cu Nanoparticles for Desulfurization of Hydrocarbon Fuel

نویسندگان [English]

  • Bahare Moradi 1
  • Arezoo Ghadi 2
  • Amir Heidari Nasab 3
  • Ehsan Binaeian 4

1 1M.Sc. Student, Science & Research Branch, Islamic Azad University, Tehran, Iran

2 Assist. Professor, Department of Chemical Engineering, Faculty of Engineering, Ayatolah Amoli Branch, Islamic Azad University, Amol, Iran

3 Assoc. Professor, Department of Chemical Engineering, Faculty of Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

4 Assoc. professor, Department of Chemical Engineering, Faculty of Engineering, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran

چکیده [English]

Sulfur is one of the elements in fossil fuels that is converted to sulfur dioxide, which is one of the most important air pollutants, when burned in a car engine. In the present study, the adsorption capacity of an organic sulfurized compound from a diesel fuel model containing 300 ppm thiophene was evaluated using x13 zeolite modified with 3% by weight of copper metal. Moreover, the effect of three parameters of contact time (15, 30, 60, and 120 min), adsorbent value (0.5, 1, 2.5 and 3.5 g) and temperature (25, 40, 50 and 60 °C) was assessed in a discontinuous system. In order to activate the adsorbent surface cations, x13 zeolite was washed with deionized water and 0.1 M copper nitrate salt and then copper nanoparticles were loaded on it. The maximum adsorption capacity was 2.5 g of adsorbent at 60 min at room temperature, and the amount of thiophene for adsorption modified with copper nanoparticles increased from 300 to 138 ppm. The adsorption results showed that an increase of more than 2.5 g of adsorbent would not cause a significant change in the adsorption efficiency. In addition, FT-IR, SEM and N2 physisorption studies showed that the adsorbent would maintain its regular structure after nanoparticle loading. Finally, the modified zeolite showed better performance for desulfurization of the diesel fuel model.

کلیدواژه‌ها [English]

  • Adsorption
  • Cu Nanoparticles
  • Desulfurization
  • Zeolite Modification
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