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Reaction Calorimetry for Liquid Organic Hydrogen Carrier Kinetics and Thermodynamics


Characterization Tools


Pacific Northwest National Laboratory (PNNL)

Capability Expert(s)

Abhi Karkamkar ([email protected]), Tom Autrey ([email protected])


Calvet calorimeter with reversal mixing mechanism and stainless steel reaction cells

C-80 Calvet calorimeter with reversal mixing mechanism. The reaction cells are made of stainless steel with volume of 8 cc and can be coupled with pressure transducer or RGA.

PNNL has a C-80 Calvet calorimeter to measure heat of reaction of solid-liquid, solid-liquid-gas, and liquid-liquid-gas reactions. Reaction calorimetry can be used to measure enthalpy of hydrogenation, dehydrogenation, and catalytic reactions of hydrogen uptake and release as a function of temperature (25°C to 200°C) and pressure (1 to 100 bar) by liquid organic hydrogen carriers under isobaric conditions.  Under reaction conditions hydrogen purity can be analyzed by a residual gas analyzer (RGA). Inert atmosphere (nitrogen, argon, helium) is available for loading calorimetry cells.


Currently available for use in collaboration with HyMARC.


  1. G. Chen, L. N. Zakharov, M. E. Bowden, A. J. Karkamkar, S. M. Whittemore, E. B. Garner, T. C. Mikulas, D. A. Dixon, T. Autrey, and S.-Y. Liu, "Bis-BN Cyclohexane: A Remarkably Kinetically Stable Chemical Hydrogen Storage Material," Journal of the American Chemical Society 137, no. 1 (2015): 134–137. doi:10.1021/ja511766p.
  2. A. Karkamkar, K. Parab, D. M. Camaioni, D. Neiner, H. Cho, T. K. Nielsen, and T. A. Autrey, "A thermodynamic and kinetic study of the heterolytic activation of hydrogen by frustrated borane-amine Lewis pairs," Dalton Transactions 42, no. 3 (2013): 615–619.