سنتز هیبریدی مایکروویو- احتراقی نانوکاتالیست CuO/ZnO/Al2O3 در غلظت های مختلفی از اکسیژن جهت تولید هیدروژن از متانول

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشکده مهندسی شیمی، دانشگاه صنعتی سهند

2 دانشگاه صنعتی سهند

10.22034/jfnc.2022.336530.1315

چکیده

روش سنتز هیبریدی مایکروویو - احتراقی به‌عنوان یکی از روش‌های آسان، موثر و سریع برای تولید نانوکاتالیست‌ها‌ شناخته شده است. در این تحقیق، اثر اتمسفر احتراق بر روی خواص فیزیکی – شیمیایی و کاتالیستی نانوکاتالیست‌های CuO/ZnO/Al2O3 به‌عنوان کاتالیست‌های فرایند ریفورمینگ متانول با بخار آب مورد بررسی قرار گرفته است. بدین منظور سه نوع نانوکاتالیست با غلظت‌ها‌های مختلف اکسیژن اتمسفر در سنتز هیبریدی مایکروویو – احتراقی تهیه شد. خواص فیزیکی – شیمیایی نانوکاتالیست‌های سنتزی توسط آنالیزهای XRD، FESEM، EDX، BET و FTIR مطالعه شد. مشخص شد که بلورینگی گونه‌ها‌ی مس کمتر از دیگر نمونه‌ها‌ بوده که منجر به پراکندگی بیشتر سایت‌های مس به‌عنوان مراکز مهم واکنش ریفورمینگ متانول با بخارآب شناخته می‌شوند. علاوه بر این مساحت سطح بیشتر و مورفولوژی سطح بهتر نمونه CZA-O60N40 منجر به تبدیل متانول بالاتر شده است. ولی پراکندگی صفحه بلوری Zn(100) منجر به تولید منوکسید کربن به‌عنوان محصول نامطلوب شده است.   

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Hybrid Microwave-Combustion Synthesis of CuO/ZnO/Al2O3 Nanocatalyst Using Various Oxygen Contents for Hydrogen Production from Methanol

نویسندگان [English]

  • Mohammad Haghighi 1
  • Hossein Ajamein 2
1 Chemical Engineering Faculty, Sahand University of Technology,
2 Sahand University of Technology
چکیده [English]

The hybrid microwave-combustion synthesis method is a facile and rapid pathway for fabrication of nanocatalysts. In this study, the effect of combustion atmosphere on physicochemical and catalytical properties of CuO/ZnO/Al2O3 nanocatalysts as the catalysts of the steam methanol reforming process was investigated. For this aim, three types of nanocatalysts under different oxygen concentration atmosphere were prepared. The characteristic properties of synthesized nanocatalysts were studied by XRD, FESEM, EDX, BET, and FTIR analyses. It was understood that the crystallinity of copper species is lower than the other samples which led to higher dispersion of copper sites as the main core for steam methanol reforming reaction. Moreover, higher surface area and better surface morphology of CZA-O60N40 resulted in higher methanol conversion. Nevertheless, its higher dispersion of Zn(100) crystallite facet led to more CO production as the undesired product.

کلیدواژه‌ها [English]

  • CuO-ZnO-Al2O3 Nanocatalyst
  • Microwave Assisted Combustion
  • Oxygen Content
  • Methanol
  • Hydrogen
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