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The Synthesis of Lanthanum Oxide/Ni Catalyst on the CMK-3 for the CO2 reforming of CH4 | ||
| Journal of Heat and Mass Transfer Research | ||
| دوره 9، شماره 2 - شماره پیاپی 18، بهمن 2022، صفحه 279-288 اصل مقاله (737.67 K) | ||
| نوع مقاله: Full Length Research Article | ||
| شناسه دیجیتال (DOI): 10.22075/jhmtr.2023.25371.1367 | ||
| نویسندگان | ||
| Abass Kakoo؛ Mardali Yousefpor* | ||
| Facualty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran | ||
| تاریخ دریافت: 07 آذر 1400، تاریخ بازنگری: 27 دی 1401، تاریخ پذیرش: 12 اسفند 1401 | ||
| چکیده | ||
| The catalysts with valve metals had been modified to use in the reforming process. Furthermore, there is a trend to the cheaper materials due to the deactivation and high price of the mentioned catalysts. In this case, at the present research work, the Nickel/CMK-3 catalysts with La2O3 as the promoter were synthesized by an impregnation method with 3 wt. % of La2O3. Also, the Nickel catalysts/CMK-3 and Nickel catalysts-La2O3/CMK-3 were characterized by N2 adsorption-desorption, X-ray diffraction (XRD), Transmission electron microscopy (TEM), Field emission scanning electron microscopy (FE-SEM), Temperature programmed reduction (TPR), and the performance of the catalysts for CO2 reforming of CH4. In addition, the temperature programmed reduction (TPR) technique was selected to evaluate the catalyst properties for the CO2 reforming of CH4. In final, the obtained results demonstrated that the formation of amorphous mesoporous Carbon with NiO nanoparticles inside the channels of the supported base and also the Lantana oxide addition induced better Nickel oxide dispersion and increased the interaction of the catalyst particles with support. As a result, the Nickel catalysts supported on the Carbon mesoporous has shown enough activity for the CO2 reforming of CH4 at 650 ºC. However, the mentioned samples were deactivated due to Carbon oxidation according to the TGA results. Therefore, the addition of La2O3 with 3 wt. % as a promoter improved the catalytic activity up to 57% and enhanced the catalytic stability at a duration time of 2 hr. | ||
| کلیدواژه‌ها | ||
| Dioxide carbon gas؛ Methane؛ Lanthanum oxide؛ Promoter؛ Nickel catalyst | ||
| عنوان مقاله [English] | ||
| ساخت کاتالیست اکسید لانتانیوم/ نیکل بر روی مزوپور کربن برای ریفرمینگ گاز متان | ||
| چکیده [English] | ||
| کاتالیزورهای دارای فلزات نجیب برای استفاده در فرآیند خشک متان مورد عملیات اصلاح قرار داد شدند. همچنین به دلیل غیرفعال شدن و قیمت بالای کاتالیزورهای مذکور گرایش به استفاده از مواد ارزان‌تر در این مورد است. بر این اساس، در کار پژوهشی حاضر، کاتالیزورهای نیکل/CMK-3 با La2O3 به عنوان ارتقا دهنده به میزان سه درصد وزنی با روش تراوش سنتز شدند. همچنین، کاتالیزورهای نیکل/CMK-3 و کاتالیزورهای نیکل-La2O3/CMK-3 با جذب-واجذ N2، پراش اشعه ایکس (XRD)، میکروسکوپ الکترونی عبوری (TEM)، میکروسکوپ الکترونی روبشی گسیل میدانی (SEM -FE) مشخص‌یابی شدند. همچنین، روش احیا تحت برنامه ریزی شده دمایی (TPR)، و عملکرد کاتالیزورها بررسی گردیدند. علاوه بر این، روش احیا برنامه ریزی شده دمایی (TPR) برای ارزیابی خواص کاتالیزور در فرایند خشک متان به کار رفت. در نهایت، نتایج به‌دست‌آمده نشان داد که تشکیل کربن مزو متخلخل آمورف با نانوذرات NiO در داخل کانال‌های پایه حمایت‌شده و همچنین افزودن اکسید لانتانیا باعث پراکندگی بهتر اکسید نیکل و افزایش برهم‌کنش ذرات کاتالیست با پایه می‌شود. در نتیجه، کاتالیزورهای نیکل پشتیبانی شده بر روی مزوپور کربن فعالیت کافی در فرایند خشک متان در دمای 650 درجه سانتیگراد نشان دادند. اما نمونه های مذکور به دلیل اکسیداسیون کربن بر اساس نتایج TGA غیرفعال شدند. بنابراین، افزودن La2O3 به مقدار سه درصد وزنی به عنوان پروموتر فعالیت کاتالیزوری را تا 57 درصد بهبود بخشید و پایداری کاتالیزوری را در مدت زمان 2 ساعت افزایش داد. کلمات کلیدی: دی اکسید کربن، متان، اکسید لانتانیم، پروموتر، کاتالیزور نیکل | ||
| کلیدواژه‌ها [English] | ||
| دی اکسید کربن, متان, ارتقا دهنده لانتانیوم, کاتالیست نیکل | ||
| مراجع | ||
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