Thermodynamic Analysis
• The aim is to calculate the equilibrium concentration of the mixture
using the following method:
 Stochiometric Method
Non-stochiometric method
Stochiometric Method
Single reaction in a homogeneous gas phase system:
Assuming an ideal gas and the equilibrium constant is known
 There
are
four
unknowns: a, b, c,
and d.
 We need to convert
four unknowns into
one unknowns
Stochiometric Method
Reaction coordinate
Non-stochiometric method
Methane steam reforming reaction
Non-stochiometric
method:
: Gibbs reactor
No input equation
required
 Stochiometric Method
Equilibrium reactor
Conversion reactor
Equation Input is
required
Steam to Carbon molar ratio =3.5
Calculate equilibrium conversion of methane and water within specified temperature range
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
Stochiometric Method
CH4 exit flow rate
H2 exit flow rate
CO exit flow rate
CO2 exit flow rate
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Non-stochiometric method: Gibbs Reactor
Results from Gibbs Free reactor
Results from Equilibrium reactor
CO Hydrogenation to Methanol
Reaction Type: Isothermal