IMI systems for high pressure manometric gas adsorption measurements

IMI is a flexible platform for gas sorption analysis. Based on the manometric Sieverts method, the IMI features many possibilities for novel and unique approaches to the measurement of gas adsorption/absorption properties of materials.

As an evolution of our successful HTP systems, the IMI is based on several fundamental principles :

• Modular, fully upgradable design
• Careful design of system volumes and thermostatting for maximum sensitivity and accuracy, even with the smallest samples.
• Highly flexible configuration of experiments
• Unrivalled safety features
• Wide range of options for :
  • pressure and temperature control,
  • multiple reference volumes,
  • a variety of reactor configurations,
  • flow-controlled Dynamic experiments,
  • fully integrated mass spectrometry.

Experimental Methods

• Sieverts method
  • for gas sorption and desorption isotherm determination
  • kinetic data
  • configurable equilibration times and endpoint criteria
• Automatic PCT mapping
• Automated sequences and cycling of pressure and temperature for sample pretreatment and activation
• Dynamic and Flowing Methods with IMI-FLOW options :
  • Dynamic sample treatments,
  • Volumetric kinetic measurement,
  • Thermal desorption analysis, TPD,
  • Thermal desorption-Mass spectrometry, etc.

Specifications

Specifications depend on the configuration of a particular instrument, but a typical system might offer the following characteristics.

• Pressure : 0 to 200 bar (0 to 20 MPa)
• Temperature : 77 K to 773 K ( −196 °C to 500 °C)
• Sample volumes from 1 to 10cc
• Sample sizes few mg to 10’s of grams
• Typical gases : H₂, CO₂, CH₄, N₂, Ar etc

Please contact us to discuss your specific requirements.

Pressure, Temperature and Reactor options

• Gas supply and pressure measurement options
  • Standard 100 bar pressure range.
  • 2 mbar to 200 bar options
  • Multiple dosing volume options (10 cc to 1 litre)
  • Multiple gas inputs
  • High vacuum in-situ degas with integrated turbo pumping
• Sample Cell/Reactor and temperature control options
  • Reactor with integrated heater and optional cooling (cryogen or waterbath circulation).
  • Removable cell for loading in a glovebox
  • Cryogen immersion sample cell.
  • Tube furnace
  • Standard reactor sizes of 1 cc, 10 cc.
  • Remote and custom reactor options availble for special applications.
• Dynamic and Mass spectrometry
  • Flow controllers for dynamic measurements
  • Through-path sample reactors.
  • Fully integrated Mass spectrometer (both hardware and software)

Safety features

• Minimal pressurised volume to limit stored energy, and gas hazard.
• Permanently connected overpressure protection.
• Automatic reactor integrity check after sample loading.
• Leak detector interface and options for automatic system shutdown.
• Fully compliant with the European Pressure Equipment Directive (PED)

Several basic configurations are proposed, each of which responds to a basic application type. All IMI systems can be enhanced with optional features to respond to your specific needs :

• IMI-HTP for high pressure manometric analysis
• IMI-PSI with adaptions for porous materials characterisation
• IMI-FLOW systems with multistream dynamic flow and integrated mass spectrometry

See also

• Gravimetric IGA systems for measurements up to 20 bar.
• XEMIS gravimetric instrument for high pressure sorption measurements

For further information, or if you would like to discuss your application, please contact us.