کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1278287 | 1497546 | 2012 | 6 صفحه PDF | دانلود رایگان |
Thermochemical water-splitting by sodium redox reactions was investigated from material science point of view as a future hydrogen production method. The reaction system consists of three separate reactions, which are hydrogen generation by NaOH-Na reaction, metal separation by thermolysis of Na2O, and oxygen generation by hydrolysis of Na2O2. Although the current techniques of thermochemical water-splitting required a temperature higher than 800 °C for whole reaction cycle, the sodium system was able to be operated below only 400 °C by using nonequilibrium techniques to control the entropy of the chemical reactions. Therefore, this system should be recognized as a potential water-splitting technique that can widely utilize any heat sources in contrast to the conventional methods.
► Hydrogen production via water-splitting by sodium redox reactions can proceed below 400 °C.
► Entropy control by using nonequilibrium technique successfully reduces the reaction temperature.
► The operating temperature of 400 °C is significantly lower than that of conventional techniques.
Journal: International Journal of Hydrogen Energy - Volume 37, Issue 23, December 2012, Pages 17709–17714