Estimation of Enthalpy of Formation of Metal Hydrides: Effect of Different Measurement Parameters

  • E. Anil KumarEmail author
  • Dhananjay Mishra
  • Vinod Kumar Sharma
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)


The enthalpy of formation of metal hydrides is estimated by van’t Hoff equation. Pressure-concentration isotherms (PCIs) at different temperatures are used to obtain van’t Hoff plots. Enthalpy of formation is an important input in simulation and performance estimation of metal hydride-based engineering devices. The absolute error in the measurement of enthalpy of formation depends upon the relative error of PCI measurements. The error in the estimation of this quantity depends upon the number of temperature points used for obtaining van’t Hoff plots and, temperature range and size of the range. In the present study, PCIs of MmNi3.5Co0.8Al0.7 hydride were measured in the temperature range of 20–240 ℃. The effect of number of temperature points, temperature range and size of the range on the estimation of enthalpy of formation is studied. The effect of the temperature range and size of the range are found to be more sensitive in the estimation of enthalpy of formation.


Enthalpy of formation Van’t Hoff plot PCIs Metal hydride 


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© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • E. Anil Kumar
    • 1
    • 2
    Email author
  • Dhananjay Mishra
    • 1
  • Vinod Kumar Sharma
    • 3
  1. 1.Discipline of Mechanical EngineeringIndian Institute of Technology IndoreIndoreIndia
  2. 2.Department of Mechanical EngineeringIndian Institute of Technology TirupatiTirupatiIndia
  3. 3.Department of Thermal and Energy EngineeringVellore Institute of TechnologyVelloreIndia

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