Properties of different Fe (III) species introduced into NH4-Y zeolites

✍ Scribed by Jana Nováková; Ludmila Kubelková; Blanka Wichterlová; Tomáš Juška; Zdeněk Dolejšek

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 571 KB
• Volume: 2
• Category: Article
• ISSN: 0144-2449
• DOI: 10.1016/s0144-2449(82)80035-3

✦ Synopsis

Depending on preparation conditions, two types of Fe(lll) species were found (a cationic and a hydrated oxide form) and characterized in Fe(III)N H4-Y zeolites with iron,content in the range 0.3-5.8 wt %. These two forms were found to differ mutually, as well as from separate Fe20 3 phase, as far as self-reduction and reduction with hydrogen are concerned.

Up to 23%:exchange was found to yield only Fe(lll) ions in the zeolite, whereas the other species only appears at higher levels of exchange. These processes were studied by means of X,p.s., e.p.r., t.p.r, and CO adsorption measured by i.r. spectrometry.