Agglomeration mechanism during the preparation of nickel(0) and iron(0) zeolites

Schmidt, Friedrich; Bein, Thomas; Ohlerich, U. and Jacobs, Peter A. (1984): Agglomeration mechanism during the preparation of nickel(0) and iron(0) zeolites. In: Olsen, David (ed.) : Proceedings of the 6th International Zeolite Conference. Guildford: Butterworth. pp. 151-160

Abstract

Magnetization measurements have been used to study the reduction process of Ni - zeolites and the thermal decomposition of iron pentacarbonyl adsorbed on NaY zeolites . The Ni(0) particle size distribution in H2»reduced NiNaA, Ni NaX, Ni NaY and NiNaM is bidisperse. The amount and the volume of particles exceeding the cage dimensions increases in the sequence Μ,Υ,Χ,Α zeolites. Particle fusion is found to be the rate determining step. With decomposition of Fe(C0)5/NaY adducts, up to 97 wt.% of the iron particles produced are smaller than 1.3 nm. Fluidized sample bed, inert gas atmosphere and fast heating up to 440 Κ are essential to reach mononodal dispersion.

• Item Type: Conference or Workshop Item (Other)
• Faculties: Chemistry and Pharmacy
• Subjects: 500 Science > 540 Chemistry
• Place of Publication: Guildford
• Language: English