کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
157781 456982 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High vs. low temperature reforming for hydrogen production via microtechnology
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
High vs. low temperature reforming for hydrogen production via microtechnology
چکیده انگلیسی

Hydrogen production from a multifunctional microdevice consisting of thermally coupled catalytic plate combustion and reforming microreactors is simulated for methane and methanol reforming as representatives of a high and a low temperature process, respectively. Both reforming processes are feasible at microscales with high conversions over a wide combustible and reforming stream inlet velocity range, and can be tuned to provide variable power output. Interestingly, in low temperature reforming, the fraction of heat release that is wasted, as “excess enthalpy” in the products, is not significantly lower than in high temperature reforming at the breakthrough limit. Along the breakthrough line, more than 30% higher power efficiency to hydrogen is predicted for the methanol system due to the high CO2:CO ratio. Finally, matching the reaction zones in the two channels via proper choice of catalyst loadings and channel gap sizes can alleviate hot spots and axial temperature gradients promoted by low conductivity materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 64, Issue 23, 1 December 2009, Pages 4856–4865
نویسندگان
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