کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5012273 1462812 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamic analysis of methane dry reforming: Effect of the catalyst particle size on carbon formation
ترجمه فارسی عنوان
تجزیه و تحلیل ترمودینامیکی ریفرنج خشک متان: اثر اندازه ذرات کاتالیزور بر تشکیل کربن
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
The effect of catalyst particle size on thermodynamic equilibrium of methane dry reforming and carbon formation has been studied through the Gibbs free energy minimization method taking into account the deviation of carbon formed from graphite Gibbs energy and its dependence on catalyst particle size. Methane and CO2 conversions are maximized at low pressure and high temperature, and a molar H2/CO ratio of 1 is obtained at 1100-1200 K and 5-10 bar. Carbon formation was found to increase with particle diameter, and carbon presence was noticed at conditions of high pressure/low temperature and high temperature/low pressure. Optimal operating conditions were found to be close to carbon limits, highlighting the need for active metal particle size to be less than 5-6 nm to minimize coking. CO was identified as the precursor for carbon at low temperature, while CH4 was found to be the main precursor at high temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 150, 15 October 2017, Pages 614-622
نویسندگان
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