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Catalyst preparation
Johnson Matthey Catalysts has the widest range of preparation methods
(precipitation, adsorption, impregnation, coprecipitation, sponge metal)
available and the dedicated kit suitable for scaling from gram to kilo and
kilo to tonne quantities of catalyst.
We use a wide range of state-of-the-art development equipment in key
catalyst forming areas such as pelleting, extrusion, granulating, spray drying and encapsulation.
For catalyst finishing we have a comprehensive range of drying,
calcination, reduction and passivation equipment (static, rotating,
moving, fluidised bed) operated under a broad spectrum of conditions.
Catalyst characterisation
Johnson Matthey’s material characterisation capabilities include:
- N2 and Hg porosimetry providing pore volume, pore size distribution,
average pore diameter, BET surface area
- Full range of chemisorption techniques for measuring active metal
surface areas (e.g. Ni, Co, Cu, Pd, Pt, Ru)
- X-ray diffraction for measuring crystallite sizes and identification of
the crystallite phases present
- Scanning Electron Microscopy, Transmission Electron Microscopy
- EPMA: Electron Probe Micro-Analysis
- X-ray fluorescence, AAS and classical methods for catalyst
composition
- Infra Red and Raman spectroscopy, vibrational spectroscopic
techniques for measurement of adsorbates on catalytic surfaces
- X-ray Photoelectron Spectroscopy for measuring surface
composition of catalysts
- Ammonia and pyridine adsorption and desorption to determine Lewis and Bronsted acid sites
- TGA, DSC, DTA, TPR analysis following thermally induced changes of
a catalyst or its components
- Coulter and Malvern particle size analysis, and sedimentation
techniques
- Full range of equipment for measuring strength and attrition of
formed catalysts and powders
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