Question :
A butane isomerisation process produces 70 kmole/hr of pure isobutane. A purge stream removed continuously, contains 85% n-butane and 15% impurity (mole%). The feed stream is n-butane containing 1% impurity (mole%). The flow rate of the purge stream will be
1. 3 kmole/hr
2. 4 kmole/hr
3. 6 kmole/hr
4. 5 kmole/hr
Answer :
4 - 5 kmole/hr
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