Chemisorption

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Catalysts are used in a variety of applications from the production of consumer goods to the protection of the environment. Optimum design and efficient utilization of catalysts require a thorough understanding of the surface structure and surface chemistry of the active material.

Chemical adsorption (chemisorption) analysis techniques provide much of the information necessary to evaluate catalyst materials in the design and production phases, as well as after a period of use. Catalytic activity is evaluated by measuring the amounts and types of reactive gas adsorbed. This volume of gas, along with an understanding of the reaction stoichiometry, is used to calculate metal dispersion, active surface area, size of crystallites, and surface acidity.

Micromeritics instruments are specifically designed for the highly aggressive environment present during chemisorption analysis. Internal components are constructed of highest-quality stainless steel to prevent reactivity with most commonly used chemisorptives. Heated manifolds, gas lines, and detectors are provided to allow analysis with condensable vapors. Sample preparation occurs in situ to prevent contamination prior to analysis. Samples can be prepared at high temperatures (up to 1100 deg C) and at low pressures (<10 -5 mmHg).

autochem_thumb The AutoChem II 2920 Automated Catalyst Characterization System performs a full array of highly precise, temperature-programmed chemisorption studies.

 


asap_2020_thumb The ASAP 2020 Accelerated Surface Area and Porosimetry Analyzer uses gas sorption techniques for research and quality control applications. Also available is the Chemical Adsorption (“Chemisorption”) option, which uses the static volumetric technique to determine the percent metal dispersion, active metal surface area, size of active particles, and surface acidity of catalyst materials.


Micromeritics also provides a number of Chemisorption Reference Materials for use in the above mentioned systems. Please contact us for more information on which reference materials best apply to your application and type of instrument.

                                                                                                                                                                                                                                                                                                                                                                                                                           

Last Updated on Thursday, 01 November 2012 10:23