Simultaneous Determination of the Adsorption Isotherm and the Adsorption Enthalpy

Category

Characterization Tools

Laboratory

Pacific Northwest National Laboratory (PNNL)

Capability Expert(s)

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

Description

BT2.15 Calvet calorimeter. The reaction cells are made of stainless steel with volume of 8 cc and can be coupled with pressure transducer or PCTPro.

BT2.15 Calvet calorimeter. The reaction cells are made of stainless steel with volume of 8 cc and can be coupled with pressure transducer or PCTPro.

PNNL is developing a microcalorimetric setup capable of measuring isotherm and enthalpy directly at subambient conditions. PNNL has a BT2.15 Calvet calorimeter to measure heat of reaction of solid-gas and liquid-gas interactions to measure enthalpy of hydrogenation, dehydrogenation, temperature (-125°C to 200°C), and pressure (1 to 100 bar) under isothermal or ramping conditions. Inert atmosphere (nitrogen, argon, helium) is available for loading calorimetry cells. In collaboration with the National Renewable Energy Laboratory, PNNL is combining a low temperature Calvet-Tian calorimeter with a PCT as a microdoser.

Status

Currently available for further development in collaboration with HyMARC.

References

  1. P. L. Llewellyn and G. Maurin, "Gas adsorption microcalorimetry and modelling to characterise zeolites and related materials," Comptes Rendus Chimie 8 (2005): 283–302.
  2. J. A. Mason, J. Oktawiec, M. K. Taylor, M. R. Hudson, J. Rodriguez, J. E. Bachman, M. I. Gonzalez, A. Cervellino, A. Guagliardi, C. M. Brown, P. L. Llewellyn, N. Masciocchi, and J. R. Long, "Methane storage in flexible metal–organic frameworks with intrinsic thermal management," Nature 527 (2015): 357–361. doi:10.1038/nature15732.
  3. B. Schmitz, U. Muller, N. Trukhan, M. Schuber, G. Ferey, and M. Hirscher, "Heat of Adsorption for Hydrogen in Microporous High-Surface-Area Materials," ChemPhysChem 9, no. 15 (2008): 2181–2184.