Heat and Mass Transfer Properties of Mm-Based Metal Hydride upon Co Content

Mm계 금속수소화물의 Co함량에 따른 열 및 물질전달특성

  • Park, Chan-kyo (School of Engineering, Industrial Chemistry Major, Donkook University)
  • 박찬교 (단국대학교 공업화학과)
  • Published : 2004.06.30

Abstract

The effect of the cobalt content on the thermodynamic and, heat and mass transfer properties of the $MmNi_{5-y}B_{y-z}C_z(y=0.5{\sim}1.5,\;z=0.5)$hydrogen storage alloys has been studied systematically. The P-C isotherms curves show that with increasing cobalt content in the alloys, the plateau pressure of the hydrogen absorption and desorption and enthalpy(${\Delta}H$) increases steeply and the plateau region becomes flat, while entropy(${\Delta}S$) decreases. Also at the constant cobalt content the hydrogen transfer rate decreases with the reaction temperature, while the initial reaction kinetics increases. But the initial reaction with hydrogen completes within 1min, although the reaction proceeds about 30minutes thereafter.

Keywords

Acknowledgement

Supported by : 단국대학교

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