Analytical (Catalyst Investigation and Catchment profit proposals)

Johnson Matthey are continually striving to offer customers with the best possible solution to ensure that plants achieve high production and efficiency rates but with low intrinsic metal costs. Johnson Matthey use a wide range of analytical techniques to analyse the used gauzes and concentrate on gaining information on the following three main areas to develop appropriate gauze packs.

  • Surface analysis
  • Weight loss analysis
  • Contamination analysis

The standard analysis techniques used for catalyst reports are SEM: Scanning Electron Microscopy and EDXA: Electron Dispersive X-Ray Analysis which provide a generalised overview of the morphology, development and structure of the wires and contamination levels. This analysis is sufficient for most campaigns but can only provide elemental information at a depth of about 1 micron.

For other campaigns where further analysis is required gauze samples can be sent to Johnson Matthey Technology Centre at Sonning Common where the following analysis can be completed as required.

ICP: Inductively Coupled Plasma Optical Emission Spectroscopy

XPS: X-Ray Excited Photoelectron Spectroscopy – enabling a sampling depth of 5 nanometeres for elemental analysis – nitrogen, carbon, sulphur, oxygen etc.

FESEM – Field Emission Scanning Electron Microscopy - to acquire images at low kV with high magnifications enabling clearer less electrostatically distorted images with spatial resolution down to 1 1/2 nanometers.

However, if you would like any further analysis to be completed Johnson Matthey do have a wealth of possible analysis techniques at our Technology Centre and on the whole will be able to meet any demand.

Sampling at various points on the gauze surface as well as throughout the gauze pack allows further information to be gathered to assist with determining gauze performance. Please note this is a long term solution as continual gauze samples can be analysed to produce the optimum pack for a plant depending on seasonal changes, desired output, metal inventory and recovery.

Gauze pack samples can be taken once the used gauzes have been returned for refining, but ideally sample will be taken on site according to the attached sampling procedure.

Johnson Matthey can also offer gas mixing analysis with our partners Tracerco -, for further information please contact Nitro-Technologies directly so we can discuss your requirements.

Analytical Services Datasheet DOWNLOAD PDF