کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
63821 48254 2014 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling of a tubular solid oxide fuel cell with different designs of indirect internal reformer
ترجمه فارسی عنوان
مدل سازی یک سلول سوختی اکسید جامد با طرح های مختلف اصلاح کننده داخلی غیر مستقیم
کلمات کلیدی
اصلاح داخلی داخلی سلول سوختی اکسید جامد، دیوار اصلاح کننده دیواری حلقوی، اصلاح کننده تخت بسته شده، کاتالیزور دیوار اصلاح کننده دیوار، اصلاح کننده حلقوی کاتالیزور
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی

The cell performance and temperature gradient of a tubular solid oxide fuel cell with indirect internal reformer (IIR-SOFC) fuelled by natural gas, containing a typical catalytic packed-bed reformer, a catalytic coated wall reformer, a catalytic annular reformer, and a novel catalytic annular-coated wall reformer were investigated with an aim to determine the most efficient internal reformer system. Among the four reformer designs, IIR-SOFC containing an annular-coated wall reformer exhibited the highest performance in terms of cell power density (0.67 W·cm−2) and electrical efficiency (68%) with an acceptable temperature gradient and a moderate pressure drop across the reformer (3.53 × 10−5 kPa). IIR-SOFC with an annular-coated wall reformer was then studied over a range of operating conditions: inlet fuel temperature, operating pressure, steam to carbon (S : C) ratio, gas flow pattern (co-flow and counter-flow pattern), and natural gas compositions. The simulation results showed that the temperature gradient across the reformer could not be decreased using a lower fuel inlet temperature (1223 K–1173 K) and both the power density and electrical efficiency of the cell also decreased by lowering fuel inlet temperature. Operating in higher pressure mode (1–10 bar) improved the temperature gradient and cell performance. Increasing the S : C ratio from 2 : 1 to 4 : 1 could decrease the temperature drop across the reformer but also decrease the cell performance. The average temperature gradient was higher and smoother in IIR-SOFC under a co-flow pattern than that under a counter-flow pattern, leading to lower overpotential and higher cell performance. Natural gas compositions significantly affected the cell performance and temperature gradient. Natural gas containing lower methane content provided smoother temperature gradient in the system but showed lower power density and electrical efficiency.

Graphical AbstractIIR-SOFC containing an annular-coated wall reformer exhibited the cell power density (0.67 W/cm2) and electrical efficiency (68%) with an acceptable temperature gradient and a moderate pressure drop across the reformer (3.53×10−5 kPa).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Energy Chemistry - Volume 23, Issue 2, March 2014, Pages 251–263
نویسندگان
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