High pressure sorption isotherms via differential pressure measurements |
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| Authors: | John M Zielinski Charles G Coe Randy J Nickel Anthony M Romeo Alan C Cooper Guido P Pez |
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| Institution: | (1) Air Products and Chemicals, Inc., 7201 Hamilton Blvd., Allentown, PA 18195, USA |
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| Abstract: | A differential pressure adsorption unit (DPAU) has been constructed which is capable of accurately measuring isotherm data
up to 2000 psia with as little as 100 mg of sample. This non-traditional adsorption/desorption method has been benchmarked
by comparing hydrogen and methane isotherms measured with standard volumetric and gravimetric instruments on a NaA (4A) zeolite
and an activated carbon at near ambient temperatures. The results from stability tests and well as the details of the mathematical
analysis for this differential pressure method are also provided. |
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| Keywords: | Adsorption Differential pressure Isotherm Isotherm measurement Hydrogen storage Volumetric method |
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