Reduction of nickel oxide on alpha alumina: coalescence of nickel to metallic crystallites |
| |
| Authors: | Martyn V. Twigg James T. Richardson |
| |
| Affiliation: | (1) ICI Chemicals & Polymers Limited, PO Box 90, TS6 8JE Wilton, Cleveland, UK;(2) Department of Chemical Engineering, University of Houston, TX7724-4792 Houston, USA;(3) Present address: Catalytic Systems Division, Johnson Matthey, Orchard Road, SG8 5HE Royston, Herts., UK |
| |
| Abstract: | Reduction of alpha-alumina-supported nickel oxide was studied with hydrogen consumption, magnetization and XRD measurements. Rupture of Ni-O bonds at 270–350 ° C is much faster than nucleation of metallic nickel and precedes growth into crystallites. Water vapor and low hydrogen flows retard both processes. At higher temperatures, growth is more rapid than Ni-O bond rupture. |
| |
| Keywords: | Nickel catalysts reduction water inhibition |
| 本文献已被 SpringerLink 等数据库收录！ |
|
