کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7722020 1497520 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermodynamics of hydrogen production from urea by steam reforming with and without in situ carbon dioxide sorption
ترجمه فارسی عنوان
ترمودینامیک تولید هیدروژن از اوره بوسیله بخار ریفینگ با جذب دی اکسید کربن در داخل و بدون آن
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
The thermodynamic effects of molar steam to carbon ratio (S:C), of pressure, and of having CaO present on the H2 yield and enthalpy balance of urea steam reforming were investigated. At a S:C of 3 the presence of CaO increased the H2 yield from 2.6 mol H2/mol urea feed at 940 K to 2.9 at 890 K, and decreased the enthalpy of bringing the system to equilibrium. A minimum enthalpy of 180.4 kJ was required to produce 1 mol of H2 at 880 K. This decreased to 94.0 kJ at 660 K with CaO-based CO2 sorption and, when including a regeneration step of the CaCO3 at 1170 K, to 173 kJ at 720 K. The presence of CaO allowed widening the range of viable operation at lower temperature and significantly inhibited carbon formation. The feasibility of producing H2 from renewable urea in a low carbon future is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 38, Issue 25, 21 August 2013, Pages 10260-10269
نویسندگان
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