Formation of monovalent nickel in NiCa-X zeolite and its interaction with various inorganic and organic adsorbates. Electron spin resonance studies

1984 ◽  
Vol 88 (22) ◽  
pp. 5236-5240 ◽  
Author(s):  
Jacek Michalik ◽  
M. Narayana ◽  
Larry Kevan
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
X Zeolite ◽  
Organic Adsorbates ◽  
Monovalent Nickel ◽  
Inorganic And Organic

Temperature Dependence of Copper (II) Catalyzed Oxidation of Propylene on X Zeolite: Relation To Copper (II) Migration

1987 ◽  
Vol 111 ◽  
Author(s):  
Jong-Sung Yu ◽  
Larry Kevan
Keyword(s):  
Activation Energy ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Flow System ◽  
Substantial Part ◽  
Zeolite Lattice ◽  
Spin Resonance ◽  
X Zeolite ◽  
Catalyzed Oxidation ◽  
Total Activation

AbstractThe copper(II) catalyzed oxidation of propylene on CuK-X zeolite was studied over the temperature range of 150 to 400°C in a flow system. Arrhenius activation energies could be obtained at less than 30%conversion from 160 to 210°C and were found to decrease with increasing copper(II) content. These results are correlated with electron spin resonance studies of the migration of copper(II) within the zeolite lattice at the reaction temperature. The change in activation energy with copper(II) content shows that a substantial part of the total activation energy is due to copper(II) migration.

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