بهینه سازی آماری با استفاده از طراحی مرکب مرکزی برای فرایند هیدروژن زدایی اکسایشی سوخت LPG بر روی Fe/HZSM-5 در حضور میدان الکتریکی خارجی

نوع مقاله : مقاله پژوهشی


1 دانشگاه تربیت مدرس

2 دانشگاه تربیت مدرس دانشکده شیمی


تغییر سطح فرمی در سطح کاتالیست بر فعالیت کاتالیستی اثر می‌گذارد. یک روش برای تغییر این سطح، استفاده از میدان الکتریکی خارجی در فرایند کاتالیستی هتروژن است. در این پژوهش HZSM-5 بارگذاری شده با اکسید فلز آهن در یک میدان الکتریکی خارجی با قدرت مناسب برای تجزیه و تحلیل فعالیت کاتالیزوری قرار داده شد. این پژوهش اولین گزارش ارائه شده برای اثر تشدید زئولیت و میدان الکتریکی خارجی برای تولید اولفین است که فعالیت بالاتری نسبت به روش‌های معمول دارد. در میدان الکتریکی ولتاژ بالا، نوار انرژی منحرف می‌شود و انحراف نوار انرژی موجب افزایش فعالیت می‌شود. طراحی آزمایش CCD با استفاده از نرم افزار Design-Expert 7.3 انجام شد تا ارتباط بین چهار متغیر فرایندی، یعنی: دما، شدت جریان الکتریکی، فاصله دو الکترود و مقدار بارگذاری فلز حاصل شود. مدل مربع برای متغیرهای پاسخ معنی‌دار بود. نتایج به دست آمده حاکی از آن است که حداکثر مقدار بازده (42/50%) را می‌توان در دمای 5/662 درجه سانتی‌گراد، شدت جریان الکتریکی ورودی 36/7 میلی آمپر، فاصله دو الکترود 8 میلی متر و بارگذاری فلز 67/3 درصد وزنی به دست آورد.


عنوان مقاله [English]

Statistical optimization using central composite design for the oxidative dehydrogenation process of LPG fuel on Fe / HZSM-5 in the presence of external electric field

نویسندگان [English]

  • Amin Alamdari 1
  • Ramin Karimzadeh 2
1 Tarbiat Modares University
2 Chemical Engineering Faculty, Tarbiat Modares University
چکیده [English]

The change in the Fermi level at the catalyst surface affects the catalytic activity. One way to change this level is to use an external electric field in the heterogeneous catalytic process. In this research, HZSM-5 was loaded with iron oxide and inserted in an external electric field with the proper strength for analyzing catalytic activity. This research is the first report presented for the synergistic effect of zeolite and external electric field to produce olefin, which has a higher activity than conventional methods. In a high voltage electric field, the energy band deviates, and the deviation of energy band increased the activity. The experimental design of the CCD was done using Design-Expert 7.3 software so that the relationship between the four process variables, namely: temperature, electrical current, the distance between the two electrodes, and the amount of metal load, are obtained. The square model was significant for response variables. The results indicate that the maximum yield (50.42%) can be resulted at 662.5 ° C, the intensity of the electric current input 3.67 mA, the distance between the two electrodes of 8 mm and the loading of the metal 6.7 3 wt.%.

کلیدواژه‌ها [English]

  • Oxidative dehydration
  • LPG fuel
  • Iron oxide
  • electric field
  • HZSM-5
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