کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10569175 | 973535 | 2011 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Towards H2-rich gas production from unmixed steam reforming of methane: Thermodynamic modeling
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
⺠Thermodynamic predictions are consistent with experimental results from USR isothermal tests under fuel/steam feed. ⺠The reacted NiO to CH4 (NiOreacted/CH4) molar ratio is a very important parameter that affects the product gas composition and decreases with time. ⺠In absence of CaO, NiO reduction reactions dominate the equilibrium system at the beginning of fuel flow, resulting in high CO2 selectivity, negative steam conversion and low concentrations of H2. ⺠At the end of fuel/steam feed, the reforming reaction is the most important chemical mechanism. In absence of CaO, H2 production reaches â¼75 mol%. ⺠During fuel flow, the energy demand increases with time. ⺠In absence of CaO, H2 at a concentration of 73 mol% can be obtained under thermo-neutral conditions. ⺠In the presence of CaO sorbent, H2 at concentrations over 98 mol% can be produced continuously under fuel/steam feeds. ⺠Carbonation reaction provides the heat for steam reforming. Thus, the heat released during air flow due to Ni oxidation can be used to decompose calcite into CaO. With a suitable duration of fuel/steam feed, as well as the right calcite to Ni molar ratios during air feed, the process can run auto-thermally.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 196, Issue 20, 15 October 2011, Pages 8568-8582
Journal: Journal of Power Sources - Volume 196, Issue 20, 15 October 2011, Pages 8568-8582
نویسندگان
Aline Lima da Silva, Iduvirges Lourdes Müller,