شیمى کاربردى روز

شیمى کاربردى روز

ساخت و بکارگیری کاتالیزورهای نیکل ارتقا داده شده با روبیدیوم و سریم بر پایه کربن فعال در پیرولیز کاتالیزوری ته‌ماند برج خلاء جهت تولید گاز غنی از هیدروژن

نوع مقاله : مقاله علمی پژوهشی

نویسندگان
دانشکده شیمی، پردیس علوم، دانشگاه تهران، تهران، ایران
چکیده
در این تحقیق با هدف تولید هیدروژن از ته مانده برج تقطیر خلاء پالایشگاه تهران، کاتالیزور های نیکل با ارتقا دهنده های سریم و روبیدیم بر پایه کربن فعال حاصل از پیرولیز پوسته بادام ساخته شدند. کاتالیزور ها با روش های ICP, BET, XRD, SEM, EDX ویژگی سنجی شده و در راکتور پیرولیز در دما های مختلف و در حضور بخار آب برای تولید حداکثر مقدار هیدروژن بکار گرفته شدند. نانو ذرات نیکل در محدوده 40-60 نانومتر بر روی پایه تشکیل شدند. حداکثر تولید هیدروژن به میزان 50.9% در دمای 725 درجه سانتی گراد حاصل گردید. استفاده از کاتالیزور نیکل بر پایه کربن فعال میزان تولید هیدروژن را تا 54.5% افزایش داد. اکسید سریم با چرخه اکسیداسیون-احیای خود، در فعال‌سازی مولکول‌های H2O شرکت نموده و سبب افزایش تولید هیدروژن تا مقدار57.3٪ گردید. پیرولیز ته مانده با استفاده از کاتالیزور های ارتقا یافته نیکل راه حلی مناسب برای تولید هیدروژن از پسماندهای سنگین نفتی است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Synthesis and Application of Rubidium and Cerium-Enhanced Nickel Catalysts Based on Activated Carbon in Catalytic Pyrolysis of Vacuum Tower Bottom Residue for Production of Hydrogen-Rich Gas

نویسندگان English

Arman Aghazadeh Chorsi
ruhollah manzel abadi
ahmad tavasoli
School of Chemistry, College of Science, University of Tehran, Tehran, Iran
چکیده English

In this research, nickel catalysts with cerium and rubidium promoters supported on activated carbon derived from almond shell pyrolysis were synthesized to produce hydrogen from vacuum distillation tower bottom residue of Tehran refinery. The catalysts were comprehensively characterized using multiple analytical techniques including ICP, BET, XRD, SEM, and EDX to determine their physical and chemical properties. These catalysts were subsequently tested in a pyrolysis reactor under variable temperature conditions in the presence of steam to optimize hydrogen production. The analysis revealed the formation of nickel nanoparticles with dimensions ranging from 40-60 nanometers distributed across the activated carbon support material. Experimental results demonstrated that maximum hydrogen production of 50.9% was achieved at an optimal temperature of 725°C. The implementation of nickel catalyst on activated carbon support significantly enhanced hydrogen yield to 54.5%. Furthermore, cerium oxide, through its distinctive oxidation-reduction cycle, actively participated in the activation of water molecules, resulting in an additional increase in hydrogen production to 57.3%. The catalytic pyrolysis of vacuum tower bottom residue using these enhanced nickel-based catalysts represents an effective and sustainable approach for hydrogen generation from heavy petroleum waste products, offering a valuable technological solution for converting refinery residues into clean energy resources.

کلیدواژه‌ها English

Vacuum distillation tower bottom residue
hydrogen
activated carbon
nickel
rubidium
cerium
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