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The poisoning of noble metal catalysts by phosphorus compounds—I chemical processes, mechanisms and changes in the catalyst

✍ Scribed by B. Angelé; K. Kirchner

Publisher: Elsevier Science
Year: 1980
Tongue: English
Weight: 283 KB
Volume: 35
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(80)85031-7

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✦ Synopsis

The pomonmg of noble metal tamer catalysts by phosphorus under oxldlzmg condltlons conslsts of two parts a "reversible" part which IS due to physlcal coverage of the surface of the metal and the carrier by phosphorus pentoxide glasses or condensed higher phosphonc acids and another, vreverslble part which IS due to chemical reation of the carrier substance (Alz03, .SlOd with the poison to phosphates The deposits from the reversible part of the process can be removed by washing wrath water or heatmg and subhmatlon m a pmson-free gas stream

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