STA HP 1 – Heat of Adsorption – HP HDSC

Platinum catalyst – Hydrogen adsorption – Gravimetric sorption

When employing volumetric methods for sorption measurements, information about heat flow and enthalpy is typically absent. To obtain details about the heat of sorption, a separate experiment is traditionally required.

A more expedient alternative is offered by the Gravimetric Sorption Analyzer (High Pressure TG-DSC), which simultaneously measures both weight change (TGA Thermogravimetry) and the signal from Differential Scanning Calorimetry (DSC). This method allows for a faster and comprehensive assessment within a single experiment, covering both sorption capacity and the heat of sorption.

App. Nr. 02-017-001 STA HP1 Heat of Adsorption- HP HDSC

The provided figure illustrates the DSC measurement segment of the adsorption of hydrogen on a Pt/Al catalyst under a pressure of 15 bar and a temperature of 80°C. The evolved heat during this sorption process is measured at 30.5 J/g.

Crucially, the heat of sorption is directly determined within the sorption experiment, as evident from the distinct peak in the curve. Additionally, the depicted curve highlights the time elapsed from the introduction of hydrogen to the initiation of the sorption reaction, providing insights into the speed at which the sample interacts with the atmosphere.

Related instruments


  • Worlds only pressure TG-DSC (STA)
  • Combined (TGA) Thermogravimetry – (DSC) Differential Scanning Calorimetry
  • Different Gas and Vapor Dosing accessories
  • RT up to 1000/1400/ 1600/ 1800°C
  • From Vacuum up to 150 bar
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