I want your suggestions on a problem which I am facing while using Gibbs reactor in Aspen Plus using IDEAL property. My aim is to check out at what conditions once can obtain the max amount of Boron from B2O3. The simulation conditions provided is
Input:
Process temperature range : 100 to 500 deg C
Pressure (abs): 110,000 Pa
B2O3 = 77.28 gms/hr (liquid)
Mg = 18.25 gms/hr (liquid)
H2 = 9.072 gms/hr (gas)
Output = ??
The result obtained shows same amount of product distribution for wide range of temperature fluctuations. One obvious change observed is that of the enthalpy data. Generally we find a variation in product distribution with change in process conditions like temp and pressure but here the pressure being maintained constant and the temp varied, the product distribution remains the same. Why is it so??
Hello, observing your results it seems that you have a reaction (the second one, B2O3 + 3H2 = 2B + 3H2O) completely displaced to product (in the whole possible temperature range) while the first reaction (B2O3 + 3Mg = 2B + 3MgO) is not happening.
It is possible that the energy data of the pure compounds is not correct, and therefore you are not getting the results you expect.
If you have experimental data it is best not to use a gibb reactor. The best option is to calculate the equilibrium of the 2 reactions at each temperature and use an equilibrium or conversion reactor.
Hello Harjeet,
When you don't see any change in the operation by varying temperature and pressure, it mean there is not interaction between the reactant and product or they are not reacting with each other.
I think you have to check the reaction again and then proceed.
Thanks,
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