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Nottingham Gas Adsorption Suite

Gas Adsorption Analysis Suite

The Gas Adsorption Analysis Suite (GAAS) is a state-of-the-art gas adsorption analysis suite that i) increases throughput and accuracy of essential measurements to the highest level, and ii) is capable of unique, complimentary and novel configurations and techniques that enable new experiments leading to new science.

The GAAS provides interchangeable and complimentary techniques by combining the following three approaches.

Research Fellow for the GAAS: Dr. Aleksandra Gonciaruk



Quantachrome Autosorb iQ-C/MP/Kr/MS coupled with in-situ mass spectrometry and calorimetry (Setaram SenSys EVO 3D TG-DSC), plus vapour dosing/venting

This is an automatic, high-vacuum, gas sorption analyser with one combined chemisorption/ physisorption port (for low pressure micropore analysis) and a second physisorption-only port. It can measure a wide range of non-corrosive adsorbates including N2, O2, Ar, Kr, CO2, CO, H2 and H2O.

Meso-/ micropore physisorption analysis and kinetics: This gathers up to 1000 data points per station during adsorption and/or desorption and can perform hysteresis loop scanning analysis.

Static and flow-through chemisorption: The instrument is specially configured to include a mass flow controller and thermal conductivity detector (TCD) for temperature-programmed reaction (TPR) studies with and without titration loop for pulse titration. It has a 1100°C furnace with fan-assisted cooling, automatic isolation of flow-through cell, and fully programmable in situ preparation and analysis sequences. Chemisorption isotherms can be determined for first (combined), second (reversible), and strong (irreversible) states with automatic evacuation between first and second isotherms.

Coupled mass spectrometer: An in-built vacuum chamber with sample introduction line and control valves allows coupling to a quadrupole mass spectrometer. The analyser has a 1-200 amu range, Faraday cup detector, dual filaments, and sample thermocouple.

Cryo-cooler: This will enable physisorption measurements within the range 20 – 320K. This allows experiments to run indefinitely and enabling the long-term analysis of gas sorption kinetics.

Coupled calorimetry: A Setaram SenSys 3D is connected via purpose-made manifold to enable high pressure differential scanning calorimetry (DSC) up to 100 bar whilst combining with volumetric measurements of the gas adsorbed/ desorbed. This measures up to 94% of all heat exchanged with the sample.

Reliably handles wet or solvent-suspended samples

Twin Hiden XEMIS high pressure sorption balances with integrated gas delivery system for high pressure measurement and low pressure measurement of corrosive gases

Fully-integrated gravimetric sorption analysers with high-accuracy microbalances to give precision weighing in extreme environments. These complement the Intelligent Gravimetric Analyser (IGA) equipment for isotherm determination and kinetics analysis.

Extreme environments: Sorption analysis can be performed under wide-ranging combinations of temperatures (77 to 773 K) and pressures (from vacuum up to 200 bar)

Use of corrosive adsorbates: The sensing and control mechanisms of the XEMIS are external to the chamber and so no sensitive components will be in the wetted zone thus enabling the use of corrosive adsorbates, e.g. SO2, NH3 and NO2,

High capacity/ throughput: The twin high pressure XEMIS instruments allow for high-capacity single component gas sorption measurements (both isotherms and kinetics). The system has a symmetric geometry, dual furnace, water bath, dual environment jacket, plus a LN2 Dewar and uses the established IGA Method for endpoint prediction.

It allows for thermodynamic studies including H2 and CH4 storage, CO2 sequestration, gas separation and purification, supercritical gas adsorption, shale gas analysis, coal bed methane plus more.

Micromeritics 3Flex for multi-station, high accuracy micropore/ surface area analysis

This is a state-of-the-art fully automated three-station gas/ vapour physisorption analyser that provides a reliable and rapid throughput of surface area, mesopore, and micropore analyses with superior accuracy, resolution, and data reduction.

Independent multi-station analysis: Each station has a dedicated pressure transducer for mesopore and micropore analysis enabling switchover and simultaneous sample analyses.

Reliability for rapid continuous through-put: Stainless steel gas inlets, manifold, valves, and gaskets eliminate interference from contaminates and outgassing. Stainless steel VCR fittings and pneumatically actuated hard seal valves provide virtually leak-free gas management to ensure maximum sensitivity during analyses.



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GeoEnergy Research Centre