Skip to content
1887
  1. Home
  2. A-Z Publications
  3. Platinum Metals Review
  4. Volume 39, Issue 1
  5. Article
Volume 39, Issue 1
  • ISSN: 0032-1400
file format pdf download PDF

Abstract

The changes of topography and structure in palladium-5 per cent nickel alloy catchment gauzes, which are used to capture the platinum lost from the catalyst gauzes employed in the ammonia oxidation reaction to produce nitric acid, have been studied by scanning electron microscopy, electron probe microarea analysis, X-ray diffraction and other techniques. The structure of the palladium-5per cent nickel alloy gauze is reconstructed by recrystallisation and this is controlled by vapour deposition (adsorption) and diffusion re-alloying. The initial solid solution of palladium (nickel) changed into palladium (platinum) solid solution, the nickel being gradually oxidised to nickel oxide until no nickel remained. The lattice constants of the palladium (platinum) solid solution increased with the ratio of platinum:palladium. Ladder-like (layered) growth was a main mechanism in the formation of new lattice planes and crystals, while screw-type growth played an important role in the formation of new crystals.

© Johnson Matthey
Loading

Article metrics loading...

/content/journals/10.1595/003214095X3911926
1995-01-01
2024-05-17
Loading full text...

Full text loading...

/deliver/fulltext/pmr/39/1/pmr0039-0019.html?itemId=/content/journals/10.1595/003214095X3911926&mimeType=html&fmt=ahah

References

  1. Philpott J. E. Platinum Metals Rev, 1971, 15, (2), 52 [Google Scholar]
  2. Contour J. P., Mouvier G., Hoogewys M., and Leclere C J. Catal., 1977, 48, 417 [Google Scholar]
  3. Pielaczek J. Platinum Metak Rev., 1984, 28, (3), 109 [Google Scholar]
  4. McCabe A. R., and Smith G. D. W. Platinum Metah Rev., 1988, 32, (1), 11 [Google Scholar]
  5. Fierro T. L. G., Palacios J. M., and Tomas F. Surf. Interface Anal., 1988, 13, 25 [Google Scholar]
  6. Rubel M., Pszonicka M., and Palczewska W. J. Mater. Sci., 1985, 20, 3639 [Google Scholar]
  7. Rubel M., and Pszonicka M. J. Mater. Sci., 1986, 21, 241 [Google Scholar]
  8. Holzmann H. Platinum Metals Rev., 1969, 13, (1), 2 [Google Scholar]
  9. Heywood A. E. Platinum Metals Rev., 1973, 17, (4), 118 [Google Scholar]
  10. Heywood A. E. Platinum Metals Rev., 1982, 26, (1), 28 [Google Scholar]
  11. Hatfield R. W., Beshty B. S., Lee H. C, Heek R. M., and Hsing T. S. European Patent77,121A; 1982 [Google Scholar]
  12. Fierro J. L. G., Palacios J. M., and Tomás F. Platinum Metals Rev., 1990, 34, (2), 62 [Google Scholar]
  13. Fierro J. L. G., Palacios J. M., and Tomás F. Surf. InterfaceAnal., 1989, 14, 529 [Google Scholar]
  14. Yang Z., Ning Y., and Zhao H. Research to be published on constituent and surface state of palladium catchment gauze in ammonia oxidation apparatus [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.1595/003214095X3911926
Loading
Structure Reconstruction in Palladium Alloy Catchment Gauzes
Platinum Metals Review 39, 19 (1995); https://doi.org/10.1595/003214095X3911926
/content/journals/10.1595/003214095X3911926
/content/journals/10.1595/003214095X3911926
Loading

Data & Media loading...

  • Article Type: Research Article

Most Cited Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error