Key TechniquesMicropore Analysis: pore size, area and volume in the micropore rangeMicropore Analysis: choice of adsorbate for ultra-micropore characterisationGas Adsorption: pore size, area and volume in the mesopore rangeGas Adsorption: BET Surface AreaMercury Porosimetry: pore size, area and volume in meso & macropore rangesMercury Intrusion / Extrusion Porosimetry: cavity to throat size Chemisorption: active metal surface area and dispersion measurement Permeability and Tortuosity: measurement by mercury intrusion porosimetryTemperature Programmed Methods: reduction, oxidation & desorptionDensity Measurement: absolute density, bulk density and skeletal density
MCA Services offers a complete suite of techniques for the physical characterisation of catalyst systems. The combination of mercury porosimetry and gas adsorption provides characterisation throughout the pore size range, from ultra-micropores through to macro-pores with a maximum size of ~ 650 µm. Mercury porosimetry can be extended to consider extrusion analysis for consideration of pore geometry as well as permeability and tortuosity determination. Most gas adsorption options also include the calculation of BET surface area as standard. Whilst nitrogen adsorption is the most commonly applied technique, alternatives are available for more specialised analyses. For example carbon dioxide for ultra-micropores with the capability of combination with nitrogen adsorption to complete a single, harmonious, pore size distribution. Argon adsorption is available for micro-porous materials proving problematic for nitrogen adsorption, for example those with charged surface species such as zeolites and organic frameworks.
Chemisorption (chemical adsorption) is routinely applied to the analysis of active metal constituents to determine their availability for a desired catalytic reaction. Active metal dispersion, surface area and crystallite size are commonly applied and at MCA Services we offer measurements using both static and dynamic methods. Hydrogen and carbon monoxide sorption represent the most common approach but we also offer more specialised options, for example nitrous oxide and ammonia to ensure that the majority of active metals and loadings can be analysed with confidence. Alongside chemisorption, our Temperature Programmed options provide analyses for reduction, oxidation and desorption, completing the characterisation and understanding of active constituents. All are applicable to new and spent catalyst materials and are particularly useful when considering the development or assessment of a system, its performance and its regeneration. MCA Services offers a complete suite of techniques for the characterisation of material porosity throughout the range of micropores, through mesopores and macropores. We also have extensive experience and expertise to actively assist with the interpretation of results, relating porous characteristics to the sample material and its ultimate application in a battery system. Combined with state-of-the-art instrumentation and software, offering flexible and extensive reporting options, we help to maximise the amount of high quality data describing sample materials.
Thesignificanceandinfluenceoftheporousnatureofcatalystsystemswithrespecttotheirfunctionality,performanceandefficiencyiswell known,asistheunderstandingofthephysico-chemicalpropertiesoftheactiveconstituents.Characterisationoftheporousnatureofcatalysts canbeappliedtotheactiveconstituents,supportmaterialsorthefinishedsystem.Understandingtheporousandactivenatureofcatalystsis vital to both un-used and spent materials and also to considering degradation and the regeneration process.
Key Techniques. Micropore Analysis: pore size, area and volume determination in the micropore range.Micropore Analysis:wide choice of adsorbate gases for ultra-micropore characterisation.Gas Adsorption:pore size, area and volume determination in the mesopore range.Gas Adsorption:BET Surface Area.Mercury Porosimetry: pore size, area and volume determination in meso & macropore ranges.Mercury Intrusion / Extrusion Porosimetry:cavity to throat size determination. Chemisorption:active metal surface area and dispersion measurement – static and dynamic methods.Permeability and Tortuosity:measurement by mercury intrusion porosimetry.Temperature Programmed Methods:reduction, oxidation, adsorption & desorption. Density Measurement:absolute density, bulk (envelope) density and skeletal density
MCA Services
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MCA Services offers a complete suite of techniques for the physical characterisation of catalyst systems. The combination of mercury porosimetry and gas adsorption provides characterisation throughout the pore size range, from ultra-micropores through to macro-pores with a maximum size of ~ 650 µm. Mercury porosimetry can be extended to consider extrusion analysis for consideration of pore geometry as well as permeability and tortuosity determination. Most gas adsorption options also include the calculation of BET surface area as standard. Whilst nitrogen adsorption is the most commonly applied technique, alternatives are available for more specialised analyses. For example carbon dioxide for ultra-micropores with the capability of combination with nitrogen adsorption to complete a single, harmonious, pore size distribution. Argon adsorption is available for micro-porous materials proving problematic for nitrogen adsorption, for example those with charged surface species such as zeolites and organic frameworks.
Chemisorption (chemical adsorption) is routinely applied to the analysis of active metal constituents to determine their availability for a desired catalytic reaction. Active metal dispersion, surface area and crystallite size are commonly applied and at MCA Services we offer measurements using both static and dynamic methods. Hydrogen and carbon monoxide sorption represent the most common approach but we also offer more specialised options, for example nitrous oxide and ammonia to ensure that the majority of active metals and loadings can be analysed with confidence. Alongside chemisorption, our Temperature Programmed options provide analyses for reduction, oxidation and desorption, completing the characterisation and understanding of active constituents. All are applicable to new and spent catalyst materials and are particularly useful when considering the development or assessment of a system, its performance and its regeneration. MCA Services offers a complete suite of techniques for the characterisation of material porosity throughout the range of micropores, through mesopores and macropores. We also have extensive experience and expertise to actively assist with the interpretation of results, relating porous characteristics to the sample material and its ultimate application in a battery system. Combined with state-of-the-art instrumentation and software, offering flexible and extensive reporting options, we help to maximise the amount of high quality data describing sample materials.
Physical Characterisation of Catalysts
Thesignificanceandinfluenceoftheporousnatureofcatalyst systemswithrespecttotheirfunctionality,performanceand efficiencyiswellknown,asistheunderstandingofthephysico-chemicalpropertiesoftheactiveconstituents.Characterisationof theporousnatureofcatalystscanbeappliedtotheactive constituents,supportmaterialsorthefinishedsystem. Understandingtheporousandactivenatureofcatalystsisvital tobothun-usedandspentmaterialsandalsotoconsidering degradation and the regeneration process.