Exchange between Steam and Hydrogen

Isotopic Exchange between Steam and Hydrogen 

The commercial catalyst is nickel on a support, but reaction (356) can also occur on surfaces of a number of other catalysts. Its kinetics was studied 

In the theoretical discussion of the kinetics we shall suppose that contents of D in water vapor and hydrogen are small (as it was in our experiments). Then the gas mixture contains practically no D20 and D2 molecules and only reaction (356) occurs. 

The results of kinetic studies conform with the notion of a reaction proceeding on a evenly or exponentially nonuniform surface in the region of medium coverages as described by the following mechanism  

Stages 1 and —2 (i.e., stage 2 in the reverse direction) are nearly the same therefore, the corresponding rate constants cannot differ greatly. However, the approximate equality of constants does not mean that the rates are near each other. Since we assume that 

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XVIII. Isotopic Exchange between Steam and Hydrogen.267... 

The kinetics of tritium exchange between steam and hydrogen... 

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