Effect of hydrogen pressure on the rate of the heterogeneous catalytic isomerization of cyclohexane Communication I. Kinetics of the isomerization of cyclohexane over a tungsten sulfide catalyst

1959 ◽  
Vol 8 (4) ◽  
pp. 586-591
Author(s):  
M. G. Gonikberg ◽  
I. I. Levitskii ◽  
B. A. Kazanskii
Keyword(s):  
Hydrogen Pressure ◽  
Sulfide Catalyst ◽  
Tungsten Sulfide ◽  
Heterogeneous Catalytic ◽  
Catalytic Isomerization ◽  
Kinetics Of

scholarly journals The catalytic isomerization of buten-1

1941 ◽  
Vol 178 (972) ◽  
pp. 106-117 ◽  
Keyword(s):  
Double Bond ◽  
Hydrogen Pressure ◽  
Square Root ◽  
Double Bond Migration ◽  
Rate Determining Step ◽  
Catalytic Isomerization ◽  
Rate Of Reaction ◽  
Hydrogenation Reactions ◽  
Kinetics Of ◽  
Catalytic Exchange

It has been shown that butene-1 undergoes isomerization to butene-2 on a nickel catalyst in the presence of hydrogen. B y using deuterium, this double-bond migration has been examined simultaneously with the exchange and hydrogenation reactions. The kinetics of double-bond migration and hydrogenation at 65° C were found to be identical, the rate of reaction in both cases being proportional to the square root of the butene pressure and to the square root of the hydrogen pressure. Energies of activation for the three reactions were measured over the temperature range 76-126° C and the following values found: Exchange 9.0 kcal. Hydrogenation 2.5 ,, Double-bond migration 5.9 ,, At the lowest temperatures, the rate of double-bond migration was about six times that of exchange. These facts are in agreement with the theory that the catalytic exchange between olefines and deuterium takes place through the formation of an associative complex. The rate-determining step in the double-bond migration is the second, fast step of the exchange reaction, viz.

The effect of hydrogen pressure on the kinetics of the HDDR-process of bulk Nd-Fe-B-type alloys

1994 ◽  
Vol 30 (2) ◽  
pp. 642-644 ◽  
Author(s):  
O. Gutfleisch ◽  
C. Short ◽  
M. Verdier ◽  
I.R. Harris
Keyword(s):  
Hydrogen Pressure ◽  
Kinetics Of
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