ChemInform Abstract: SUPPORTED CHROMIUM OXIDE CATALYSTS FAR OLEFIN POLYMERIZATION PART 8, A NEW MODEL FOR THE ACTIVE CENTERS PART 9, THE NATURE OF THE NARROW GAMMA-PHASE ESR SIGNAL AND ITS CORRELATION WITH CATALYTIC ACTIVITY

1975 ◽  
Vol 6 (7) ◽  
Author(s):  
R. SPITZ ◽  
A. REVILLON ◽  
A. GUYOT
Keyword(s):  
Catalytic Activity ◽  
Chromium Oxide ◽  
Olefin Polymerization ◽  
Oxide Catalysts ◽  
Gamma Phase ◽  
Active Centers ◽  
New Model ◽  
Chromium Oxide Catalysts

A Study of Copper-Chromium Oxide Catalysts and a Method to Determine Catalytic Activities

1963 ◽  
Vol 7 ◽  
pp. 229-239
Author(s):  
M. Stammler ◽  
M. Pyzyna
Keyword(s):  
Catalytic Activity ◽  
Chromium Oxide ◽  
Oxide Catalysts ◽  
Linear Absorption ◽  
X Ray ◽  
Chromium Spinel ◽  
Copper Chromium ◽  
The Difference ◽  
Two Phases ◽  
Chromium Oxide Catalysts

AbstractAn extensive investigation of chemical composition, particle size, and surface area of copper-chromium oxide catalysts has been made. The two phases present in the activated material are copper oxide (CuO) and copper-chromium spinel (CuCr2O4). The crystallite size of the CuO phase (determined by X-ray diffraction line broadening) can be correlated with the catalytic activity measured on a CO-CO2 oxidation reaction. The catalytic activity of the oxide catalyst can be expressed as a function of the X-ray fluorescence intensity of the Cu Kα line even on changing the absolute copper concentration up to 3%. An attempt is made to explain this phenomenon by the heterogeneity effect caused by the difference in the linear absorption factors for the Cu Kα radiation in the system CuO-CuCr2O4.

scholarly journals Olefin polymerization over supported chromium oxide catalysts

1999 ◽  
Vol 51 (2) ◽  
pp. 215-221 ◽  
Author(s):  
Bert M Weckhuysen ◽  
Robert A Schoonheydt
Keyword(s):  
Chromium Oxide ◽  
Olefin Polymerization ◽  
Oxide Catalysts ◽  
Chromium Oxide Catalysts
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