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Use this tag for questions within the problem domain of chemical engineering.

0 votes
1 answer
379 views

Sieve trays used in Liquid liquid extraction tower instead of bubble cap and valve trays?

In an LLE operation pilot plant, i saw that sieve trays are used instead of bubble cap and valve trays... In LLE operation, they require good mixing, so i was shocked why bubble cap and valve trays ar …
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0 votes
2 answers
152 views

Difference between light and heavy cracking of hydrocarbons?

Cracked gases usually are quenched after cracking reactions. Why for lighter gases like ethane, indirect quenching is used, But for cracking of heavier naphtha or gas oil, most cooling is performe …
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1 vote
0 answers
125 views

Interface level between 2 components in Liquid-Liquid Extraction, What does it mean?

In LLE physical processes, there is this level (interface) between the 2 components (for example) that is being separated as shown in the picture. I know that the height of this level from the refere …
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1 vote
1 answer
323 views

Flow rate into a reactor from feed

I have a fresh feed (stream 1) entering a reactor . This fresh feed consists 225kg/h of iso-butane , 225kg/h of butylenes and 50kg/h of n-butane . In the stream table I need to add in a flowrate va …
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2 votes
2 answers
546 views

Chemical engineering calculations - basis

You have a gas of the following compositions : 40% N2, 30% CO2, 30%,CH4 in a tank . What is the Average Molecular Weight of the gas if your compositions is based on molar ? I found that the AMR with …
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0 votes
2 answers
188 views

Heat balance in a pipe flow network

I have 2 pipe lines, both water . that combine to heat up water. Assuming at steady state , Heat gained by cold water = heat lost by hot water Let's say , according to formula , I calculated the …
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