Hello Everyone!

I am trying to perform a zero-dimensional metal hydride theoretical calculation for predicting the amount of hydrogen at respective points in the PCT curve, along with also understanding how the equations work in metal hydrides. The following research paper was used for the calculations of the concentration of the hydride in the metal hydride

I have uploaded a link below, if you get a chance to have a look, please look at equation (1) for this respective research paper. I have also posted the equation below:

CH = AP(Y/2)exp(YPVH/RT)exp(-Y H/RT)............................................... (1)

A = constant

Y = activity coefficient of hydrogen.

I would like to understand this particular equation, it looks like the hydrogen concentration is in Atomic ratio(H/M), while the unit of the equation will give us "atm". I am trying to do the hydrogen concentration and would prefer assistance in doing some calculations as well. I have also uploaded my calculations below:

Article Mathematical modeling of the PCT curve of hydrogen storage alloys