The effects of operating conditions on the performance of a direct carbon fuel cell

Archives of Thermodynamics

Zbigniew BisCzestochowa University of Technology, Department of Energy Engineering, Brze?nicka 60a, 42-200 Cz?stochowa, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Rafa? Koby?eckiCorresponding authorCzestochowa University of Technology, Department of Energy Engineering, Brze?nicka 60a, 42-200 Cz?stochowa, PolandEmailOther articles by this author:De Gruyter OnlineGoogle Scholar¹  Andrzej KacprzakCzestochowa University of Technology, Department of Energy Engineering, Brze?nicka 60a, 42-200 Cz?stochowa, PolandOther articles by this author:De Gruyter OnlineGoogle Scholar¹ 

[1] Czestochowa University of Technology, Department of Energy Engineering, Brze?nicka 60a, 42-200 Cz?stochowa, Poland

关键词: Keywords: Direct carbon fuel cell;    Biochar;    Molten hydroxide electrolyte;    Carbon anode;    Air cathode;   

DOI  :  10.2478/aoter-2013-0037

学科分类：能源（综合）

来源: Polska Akademia Nauk * Oddzial w Gdansku, Instytut Maszyn Przeplywowych / Polish Academy of Sciences, Institute of Fluid-Flow Machinery

【 摘 要 】

The influences of various operating conditions including cathode inlet air flow rate, electrolyte temperature and fuel particles size on the performance of the direct carbon fuel cell DCFC were presented and discussed in this paper. The experimental results indicated that the cell performance was enhanced with increases of the cathode inlet gas flow rate and cell temperature. Binary alkali hydroxide mixture (NaOH-LiOH, 90-10 mol%) was used as electrolyte and the biochar of apple tree origin carbonized at 873 K was used as fuel. Low melting temperature of the electrolyte and its good ionic conductivity enabled to operate the DCFC at medium temperatures of 723-773 K. The highest current density (601 A m−2) was obtained for temperature 773 K and air flow rate 8.3×106 m3s−1. Itwas shown that too low or too high air flow rates negatively affect the cell performance. The results also indicated that the operation of the DCFC could be improved by proper selection of the fuel particle size.

【 授权许可】

Unknown