کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
147896 456401 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Deactivation and kinetic studies of unsupported Ni and Ni–Co–Cu alloy catalysts used for hydrogen production by methane decomposition
ترجمه فارسی عنوان
غیر فعال کردن و مطالعات جنبشی از کاتالیزورهای آلیاژ نیکل و نایا کوآسین کوانتمی که برای تولید هیدروژن توسط تجزیه متان استفاده می شود
کلمات کلیدی
نانو ذرات، کاتالیزور آلومینیوم، تجزیه متان، مدل جنبشی، غیرفعال کردن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Hydrogen production by the thermal decomposition of methane was studied.
• Metallic Ni and Ni–Co–Cu nano-particles were prepared as catalysts for the process.
• A series of kinetic experiments were conducted using these two types of catalysts.
• Empirical and phenomenological models were used to simulate the deactivation process.
• Different deactivation mechanisms of Ni cantatas and Ni–Co–Cu catalyst were compared.

Metallic nickel nano-particles and Ni–Co–Cu alloy particles were prepared primarily as catalysts for the thermal decomposition of methane to produce hydrogen. A series of kinetic experiments were conducted using these two types of catalysts. The effects of methane partial pressure and reaction temperature on the maximal hydrogen formation rate were studied. The reaction order and activation energy were estimated. Based on the TEM micrographs and the deactivation process of catalyst, the widely used empirical model (general power law equation) and a phenomenological model (exponential decay model) were used to simulate the experimental results of Ni catalysts.By quantifying the relationship between the kinetic parameters and the reaction conditions (methane partial pressure and reaction temperature), the transient hydrogen formation rate over the reaction time was derived and validated by comparing with the experimental data. A detailed catalytic deactivation study of Ni and Ni–Co–Cu catalysts was also carried out. Different deactivation mechanisms of pure Ni catalyst and Ni–Co–Cu alloy catalysts were compared and discussed.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 243, 1 May 2014, Pages 79–91
نویسندگان
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