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Micropore Analysis - Micropore Volume and Size Distribution

Service Options

SC40 Series - Micropore and Mesopore Size and Volume Distributions by Nitrogen

Adsorption

SC49 Micropore and Mesopore Size and Volume Distributions by CO2, Argon, Hydrocarbon Adsorption MCA Services offers dedicated micropore analysis using a Micromeritics 3Flex 3050 with  full micropore facilities, capable of obtaining physisorption data at ultra-low partial  pressures.  Analysis of the isotherm may be confined to the micropore range of pressures or extended to measure a full isotherm thus providing micropore and mesopore distribution  data. Micropore reports detail both micropore volume and area together with the surface  area of the material.  A wealth of information can be derived from micropore analysis and specialist analyses can  be undertaken through the application of a range of the following adsorptive gases:  Nitrogen, Hydrogen, Argon, Carbon Monoxide, Krypton, Carbon Dioxide & Hydrocarbons.  The 3Flex micropore physisorption instrument extends the range of pore sizes analysed  down to approximately 0.35 nm diameter. The common data reduction techniques for the  generation of micropore volume and micropore area reports are DFT (Density Functional  Theory and H-K (Horvath Kawazoe).   The combination of the adsorptive used and reporting options selected, allow analyses to  be tailored to the most specialised of applications. For example, the Saito Foley cylindrical  pore volume can be generated from Horvath Kawazoe data, which is particularly suited to  the analysis of zeolites and MOFs. Of particular interest to hydrogen storage / fuel cell  materials is the generation of pressure composition isotherms showing hydrogen adsorption capacity. Carbon dioxide adsorption can also be undertaken at selected temperatures.    Should a full isotherm be measured, mesopore data (pore volume and pore area) are most  commonly generated by the BJH (Barrett, Joyner, Halenda) technique. However, DFT  (Density Functional Theory) may also be applied which has the benefit of generating pore  area and pore volume data continuously throughout the micropore and mesopore range. Screening a range of materials to identify those having appreciable microporosity is also  available via our alternative gas adsorption / physisorption options.