بررسی عملکرد و میزان پایداری لایه‌های کاتالیستی Ni-Co/Al2O3-ZrO2 تهیه شده به‌روش رسوب فیزیکی بخار در فرآیند رفرمینگ خشک متان

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده نفت و مهندسی شیمی، دانشگاه علوم تحقیقات تهران، ایران

2 مرکز تحقیقات کاتالیست، دانشکده نفت و پتروشیمی، دانشگاه رازی، کرمانشاه، ایران

3 مرکز توسعه علوم و فناوری‌های نانوکربن، پردیس پژوهش و توسعه صنایع پایین دستی نفت، پژوهشگاه صنعت نفت، تهران، ایران

چکیده

در این مطالعه عملکردکاتالیستی لایه‌های نازک Ni-Co/Al2O3-ZrO2 در فرآیند رفرمینگ خشک متان با استفاده از یک رآکتور میکروکانال مورد بررسی قرار گرفت که برای تهیه نانو ساختارها از روش رسوب فیزیکی بخار استفاده گردید. بدین منظور در ابتدا لایه‌های نازک Al2O3-ZrO2 جهت تشکیل پایه کاتالیست برروی صفحات استیل ضد زنگ لایه نشانی شدند ودر ادامه ترکیب دو فلزی Ni-Co با نسبت‌های وزنی 5/2%، 5% و 5/7% کبالت نسبت به نیکل در زمان‌های مختلف لایه نشانی min 2، min 3، min 4، برروی پایه کاتالیست لایه نشانی شد. طراحی آزمایش‌ها به‌روش باکس-بنکن انجام و آزمایش‌های رآکتوری در دمای C˚ 700، C˚ 750، C˚ 800، فشار یک اتمسفر و میزان دبی خوراک mL/min 10به‌منظور بررسی اثر پارامترهای مختلف همچون (زمان لایه نشانی (t)، درصد وزنی کبالت نسبت به نیکل (X) و دمای واکنش (T)) بر میزان فعالیت و پایداری کاتالیست مورد ارزیابی قرار گرفت. نتایج نشان داد که در زمان لایه نشانی min 4 =t و درصد وزنی کبالت نسبت به نیکل برابر 5% =X ودمای واکنش C˚ 800 =T بیشترین میزان فعالیت و پایداری کاتالیست حاصل می‌گردد.
 

کلیدواژه‌ها


عنوان مقاله [English]

Investigation of the Performance and Stability of Ni-Co/Al2O3-ZrO2 Nanocatalysts with Micro Channel Reactor in Dry Reforming of Methane

نویسندگان [English]

  • Mohamad jafar Moradi 1
  • Gholamreza Moradi 2
  • Amir Heydarinasab 1
  • Alimorad Rashidi 3
1 Department of Chemical Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran
2 Catalyst Research Center, Faculty of Chemical and Petroleum Engineering, Razi University, Kermanshah, Iran
3 Nanotechnology Research Center, Downstream Development Technologies Research Center, Research Institute of Petroleum Industry (RIPI), Tehran, Iran
چکیده [English]

In this study, the catalytic performance of thin layers of Ni-Co/Al2O3-ZrO2 was explored using the dry reforming of methane (DRM) in a microchannel reactor. Physical vapor deposition (PVD) was used for preparing the nanostructures. To this end, first, thin layers of Al2O3-ZrO2 were sputtered on stainless steel plates to form catalyst supports. Then, the combination of Co and Ni were coated on the catalytic support during different deposition times (2, 3, and 4 min) with Co/Ni weight percentages of 2.5%, 5%, and 7.5%. Box-Behnken design was used for the reactor tests, which were performed under certain conditions (i.e., temperature: 700, 750, and 800 ˚C; pressure: 1 atm; and feed flow rate: 10 ml/min) to assess the impact of various parameters (including deposition time, Co/Ni weight percentage, and reaction temperature) on catalytic activity and stability. The results showed that the highest level of activity and stability was registered at the deposition time of 4 min, the Co/Ni weight percentage of 5%, and the reaction temperature of 800 ˚C.
 

کلیدواژه‌ها [English]

  • Dry Reforming of Methane (DRM)
  • Microchannel Reactor
  • Layer Coating Through Physical Vapor Deposition
  • Thin Layers of Ni-Co/Al2O3-ZrO2
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