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Catalyst Characterisation

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Understanding the reaction kinetics of a given catalyst is important, but it is not always the final word in catalyst characterization.

It is often important to assess various physical properties in full, from total surface area to catalyst dispersion.

Overview

These properties underlie the complex dynamics of catalytic materials by determining the number of reaction sites, thus catalytic activity. Hiden Analytical supplies a range of gas analysis and microreactor systems suitable for elucidating the physical properties of your catalysts.

Catalyst Characterisation Techniques

Temperature Programmed Desorption, Reduction & Oxidation

The surface properties of heterogeneous catalysts can be probed using a range of temperature-programmed profiles, typically desorption (TPD), reduction (TPR), or oxidation (TPO). Typically, a high sensitivity mass spectrometer is coupled with a microreactor or a vacuum chamber with a heated stage. Catalysts are subjected to a linear temperature ramp while the spectrometer continuously detects changes in the measuring environment. For example: It is possible to saturate a catalyst surface with a probe molecule like ammonia and observe the rate of desorption as a function of temperature and time.

Pulse Chemisorption

Catalyst characterization systems with pulse chemisorption (PCS) mode are based on the same basic principles as the above, with the added ability of repeatedly exposing catalysts to doses of reactive gas species through the primary stream. This enables researchers to carry out detailed investigations of catalytic activity by injecting specific sorbates at key catalytic stages, such as partial decomposition or oxidation.

Catalyst Characterisation with Hiden Analytical

Hiden Analytical supplies a range of quadrupole mass spectrometers and specialized catalyst characterization systems with built-in TPD, TPR, TPO and PCS modes. Contact us today if you would like more information about our product lines and specifications.

Further Reading

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Methanol loading dependent methoxylation in zeolite H-ZSM-5 1.89 MB 3 downloads

Methanol loading dependent methoxylation in zeolite H-ZSM-5 ...
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Combining Exsolution and Infiltration for Redox, Low Temperature CH4 Conversion to Syngas 4.71 MB 20 downloads

Combining Exsolution and Infiltration for Redox, Low Temperature CH4 Conversion...
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In situ K-edge X-ray absorption spectroscopy of the ligand environment of single-site Au/C catalysts during acetylene hydrochlorination† 1.21 MB 6 downloads

In situ K-edge X-ray absorption spectroscopy of the ligand environment of single-site...
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Investigation of MoOx/Al2O3 under Cyclic Operation for Oxidative and Non-Oxidative Dehydrogenation of Propane 2.03 MB 5 downloads

Investigation of MoOx/Al2O3 under Cyclic Operation for Oxidative and Non-Oxidative...
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Silicon microfabricated reactor for operando XAS_DRIFTS studies of heterogeneous catalytic reactions 6.57 MB 5 downloads

Silicon microfabricated reactor for operando XAS_DRIFTS studies of heterogeneous...
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Oscillating syngas production on NiO/YSZ catalyst from methane oxidation† 1,013.65 KB 5 downloads

Oscillating syngas production on NiO/YSZ catalyst from methane oxidation† ...
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N2O Formation during NH3-SCR over Different Zeolite Frameworks: Effect of Framework Structure, Copper Species, and Water 6.25 MB 15 downloads

N2O Formation during NH3-SCR over Different Zeolite Frameworks: Effect of Framework...
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Investigation of CO Deactivation of Passive NOx Adsorption on La Promoted Pd/BEA 2.59 MB 14 downloads

Investigation of CO Deactivation of Passive NOx Adsorption on La Promoted Pd/BEA ...
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Chemical looping conversion of ethane to ethanol via photo-assisted nitration of ethane 2.09 MB 5 downloads

Chemical looping conversion of ethane to ethanol via photo-assisted nitration...