Hello Everyone!
I hope you all are doing well!
I am trying to do some analytical calculations for the hydrogen absorption and was wondering if:
Q =m delta H .................................................................. (1)
can be used to predict the heat of absorption during kinetic absorption rate, considering that I know my m value and the value of delta H depends on the metal hydride, which is fixed , can we then use the equation above (eq-1) and make the prediction for the heat of absorption , I believe we can define this as the amount of heat released based on the mass of hydrogen absorption.
Ketan Karkare
Until, based on the results of the question, you have made a choice which enthalpy change you want to measure. For example, you have a piece of palladium metal with maximum hydrogen dissolved in it at a given P,T.
1.You want to determine the change in enthalpy of hydrogen adsorption on its surface.
2. you want to determine the enthalpy change in the reaction of hydrogen absorption by palladium to a certain concentration
3. you want to determine the enthalpy change in the reaction of hydrogen absorption by palladium until saturation with hydrogen.
Thank you for your response!
I was trying to calculate the amount of heat(exothermic) release during the hydrogen absorption in metal hydride.(considering a fixed hydride and its properties).
Ketan Karkare
I need to write my name as required by the RG. Otherwise, the robot does not inform me about your answer. There are stoichiometric hydrides with the formula AН2 and non-stoichiometric ones such as palladium hydrides. You write that you have a fixed hydride (possibly AН2), but then you cannot write the term absorption for it. The term adsorption must be used for this. Once again, write correctly what you want to determine.
Yuri Mirgorod
Thank you for your reply !
I am trying to do some analytical calculations here
I am trying to do the kinetics calculations using the following equations
P_eq = P_ref *(delta H/RT(1/T - 1/T_ref)), here T is the temperature and T_ref is the reference temperature at which the P_ref is calculated, though I have used 293K , the paper uses 303 K as a reference temperature,
T_ref = 293 K
with a 7th polynomial equation for the reference equilibrium pressure at a reference temperature of 293 K ,hence I needed assistance in predicting the energy for the exothermic reactions released during the full absorption process.
I would love to share the paper which I am referring to , which is in pdf format
regards
Ketan
- Badges
- Science topic
- Similar topics
- Physical Sciences
- Materials Science
- Plating