What is corrosion? Which is the most important material used for metallic coating?

rasika

• Jul 2nd, 2017

Corrosion is the destruction in the metal due to oxidation with atmospheric air
aluminium(Al) is material

Deepak Mishra

• Jun 8th, 2017

The most important material used for coating is Zinc (due to its sacrificial property)

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Nabeel

• Aug 8th, 2014

Efficiency of an evaporator is given as : mass rate of vapors formed / mass rate of feed. Since in single stage evaporator there is greater LMTD as compared to the a multiple effect evaporator (of al...

Debu

• Feb 7th, 2014

Efficiency = amount of water evaporated per unit heat supply ...when we use multiple h.e ,content of water in exchanger is continuously decrease so efficiency decrease :)?

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What is Unit Process and Unit Operations? How they are different from one another?

Vishal

• Nov 28th, 2017

Unit process includes chemical change where as unit operation includes physical change

Kingsuk Karmakar

• Aug 14th, 2017

In process where only chemical changes occurs that is called Unit Process and where no chemical changes occurs only physical changes occurs that is called Unit Operation. Unit Process example like d...

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What is 3rd Law of Thermodynamics?

Bandana

• Aug 4th, 2017

At absolute 0 degree entropy of a substance is zero, as entropy is a measurement of degree of randomness.

Kingsuk Karmakar

• Aug 2nd, 2017

The entropy of a perfectly crystalline substance at zero K or absolute zero is taken to be zero.
This law is only applicable for perfectly crystalline substance. If there is imperfection at 0 K, the will be larger then zero.

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How can a chemical production engineer improve the process with respect to yield & quality?

SUCHARITHA

• Aug 22nd, 2014

A recycle stream is one way to improve purity/quality and yield of product.

VIJAYAKUMARAN

 Profile Answers by VIJAYAKUMARAN Questions by VIJAYAKUMARAN

• Jul 23rd, 2014

chemical process engineer should observe the changes in temperature, pressure, flow and electrical load of the units to understand the changes in the process. Fugitive emission and stack emission are ...

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divakarnaik822

• Sep 10th, 2017

Unit operation is the basic step in any chemical engineering related fields, in this operation only physical changes are occurred but not chemical changes
Ex:-heating, cooling, evaporation, sedimentation

Akash shrama

• Aug 13th, 2017

Each chemical process frequently consists of a fewer number of distinct individual step.

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Kingsuk Karmakar

• Jul 13th, 2017

Water density is 1 and Benzene density is 0.8765 and they are both immiscible liquid or small amount miscible (1.84 g/l). If any mixture solution contain water and benzene, water settle in lower layer (because water have higher density then benzene) and benzene present in upper layer.

Dhaval

• Jan 12th, 2017

First one is that we have two liquids 1. Water & 2. Benzene Benzene is insoluble in water. Thus both liquid solutions are immiscible. We know that We have extraction process during which the 2 liquid...

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vikas

• Jul 9th, 2017

Because distillation depends on volatility of component and toluene is a more volatile than water.

Pritam Jadhav

• May 4th, 2017

Because the boiling point of water is higher than toluene.
Thus toluene is more volatile liquid, therefore it comes out first.

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Nirav soni

• Mar 31st, 2018

Distillation column is separate the two component Based on its volatility difference, lighter and low boiling point fluid got up side and higher and high boiling point fluid got in bottom as a product.

Arul

• Jan 26th, 2018

The lighter, lower boiling point components evaporate and travel up the column to form the top product and the heavier, higher boiling point components condense and travelling down the column to form the bottom product.

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As Bernaulli's theorem is applied on fluids, so can we apply it on gases also?

Mohamed Asharaf

• Oct 7th, 2017

The assumptions in which Bernoullis equation derived are 1.Inviscid Flow 2.Steady Flow 3.Density is Constant 4.Along the Stream-line Since the gas flow obey these properties, we can conclude that Be...

deewakar vats

• Aug 13th, 2017

Sorry sir but there are certain assumption in bernaullis theorem that
1 flow is steady
2 flow is ideal
3 flow is incompressible or const density so a gas is a complessible and density can vary as per the equation
v2/g + P/w +y=const

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Manish Firake

• Apr 13th, 2018

Fractionation is a separation process in which a certain quantity of a mixture (gas, solid, liquid, enzymes, suspension, or isotope) is divided during a phase transition, into a number of smaller quan...

Successor

• May 29th, 2017

Distillation is a separation of one volatile component from a mixture of two or more
Fractionation is a separation of a certain component from many e.g gasoline

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What is the basis of choosing the shell side and tube side fluid?

Kingsuk Karmakar

• Aug 4th, 2017

If your process fluid is corrosive nature then you have choose flow in tube side. Because if fluid damage the tube it has been replace is easier and less cheaper then shell side. 2. The toxic and haza...

Sankar

• May 23rd, 2016

Tubes can be easily detached from the main body of a heat exchanger. Therefore, in case of corrosive fluid its more convenient to use it in the tube side.

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Divyansh bhushan Sen

• Jan 20th, 2018

Unit operation only physical change occur like Drying, Absorption,
Unit process both physical change & chemical change occur like Chlorination, nitration, hydrogenation

Rajat

• Oct 4th, 2017

Unit operations concern with the physical changes of the system.
Unit processes are concern with physical as well as chemical changes of the system.

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