کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
160172 457064 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of the process parameters of an electrochemical cell in the IS process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Optimization of the process parameters of an electrochemical cell in the IS process
چکیده انگلیسی

One of the key reactions for efficient hydrogen production using the water-splitting iodine–sulfur (IS or S–I) process is the Bunsen reaction (SO2+I2+2H2O=H2SO4+2HI)(SO2+I2+2H2O=H2SO4+2HI). The Bunsen reaction was examined using an electrochemical cell with a cation exchange membrane as the separator. The optimal molalities of anolyte and catholyte were evaluated by total thermal efficiency using the heat/mass balance of the IS process. The I2/HII2/HI ratio had little effect on the required total voltage; the I2/HII2/HI ratio can be reduced to 0.5 without decreasing the total thermal efficiency. On the other hand, HI and H2SO4H2SO4 molality greatly affected the total thermal efficiency. The total thermal efficiency increased with increasing HI molality up to 16.7molkg-H2O-1 and the maximum thermal efficiency was found at 15.3molkg-H2O-1 of H2SO4H2SO4. Membrane resistances are very important parameters affecting the efficiency. The total thermal efficiency increased by 3.0% at a current density of the electrochemical cell of 10.0Adm-2 by increasing the operating temperature from 313 to 363 K.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 60, Issue 24, December 2005, Pages 7160–7167
نویسندگان
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