In a butane isomerization process, 70 kmol/hr of pure iso-butane is produced. A continuous purge stream, containing 85% n-butane and 15% impurities (mole %), is removed. The feed consists of n-butane with 1% impurities (mole %). What is the flow rate of the purge stream?

CHEMICAL ENGINEERING MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
CHEMICAL ENGINEERINGchemical-engineering
Published
12 Mar 2019
Last updated
28 May 2026

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Explanation

Given the production rate of iso-butane and the composition of the purge and feed streams, the purge flow rate is calculated to be 5 kmol/hr.

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