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Lipase, immobilized on beads of density, b , 2 0 0 0 k g m - 3 at an activity of 1 0 0 0
Lipase, immobilized on beads of density, at an activity of is used
in a packed bed bioreactor to produce biodiesel. Ten per day hexane solution containing
triglycerides and : molar ratio methanol are fed into the reactor, which is loaded with
beads with a void fraction, of
Neglecting mass transfer limitations prepare a graph showing the conversion vs the volume of
the reactor and then determine the reactor volume needed for a desired conversion of
The triglycerides transesterification reaction rate, per gram of catalyst used, can be described by
the ping pong bi bi kinetic model with both substrates inhibition, given by:
Where, is the enzyme activity is the substrate concentration given as the ester
bonds on the triglycerides is the alcohol concentration and the kinetics
parameters are given below:
:
:
:
:
:
Use Polymath or any other computer package to solve the differential equations
Clearly state any assumptions made.
Hint: Relate volume of the bed to the weight of the catalyst
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