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# Distillation process - balanced and constitutive equations

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The attached drawing shows a steady state distillation process. Assuming no heat losses to the atmosphere:
a) Write four balanced equations for this system.
b) Identify where any constitutive equations may be required for the modelling processes.

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#### Solution Preview

1.
Feed:
Feed total mass = mass of X + mass of Y.
=> mF = mFX + mFY
mass of X, mFX = 60% of mF = 0.6 mF
mass of Y, mFY = 40% of mF = 0.4 mF

Top product:
Top product total mass = mass of X + mass of Y
=> mT = mTX + mTY
mass of X, mTX = 99% of mT = 0.99 mT
mass of Y, mTY = 1% of mT ...

#### Solution Summary

Solution to a distillation process, estimating balanced equations by applying heat and mass conservation concept.

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