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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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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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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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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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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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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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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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 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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Reena Mhatre

• Nov 17th, 2017

The valence of an elementor compound does depend on the number of hydrogen ions (H+) accepted or hydroxyl ions (OH-) denoted for each atomic weight or molecular weight.

Tarnveer Singh

• Oct 21st, 2017

Valency is the combining capacity of an element. For metals, it is equal to the number of electrons in the outermost shell of their atoms, and for nonmetals it is eight minus the number of electron...

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What is use of Reynolds number in designing of Heat exchange?

Dhruv

• Jul 17th, 2017

Use for determination of Shell side and tube side heat transfer coefficient, pressure drop, selection of tube side and shell side process fluid,

D.S.

• Apr 17th, 2017

The Reynolds number is first used to understand what flow regime (i.e. turbulent, transition zone, laminar). It is then used to calculate the shell-side and tube-side film coefficients which are then used to calculate an overall U.

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Explain What is Organic Chemistry?

Kingsuk Karmakar

• Jul 13th, 2017

It is the branch or part of Chemistry in which we concern with the compound of carbon. Originally confined to compound to produced by living things.

ankit

• Apr 20th, 2017

Organic chemistry is branch of chemistry which deals with carbon compound

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erpcochin  

 Profile Answers by erpcochin Questions by erpcochin

• Member Since Apr-2011 | Apr 12th, 2011

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dude...its Flaring, not flairing....
1) While refining crude oil we get non condensable gases like C1 and C2 which are not economical if condensed using extensive pressurising and cooling processes in Refineries. So we divert these gases to Flare.
2) In the process of refining we sometimes get our equipment over pressurised, this over pressure is released through safety valves to the Flare.
3) We also get some toxic gases like H2S in the process of refining, we divert these to Flare.
4) During shutdown and startup of the process plants, to stabilise the plant we also divert some non condensables, over pressure to the Flare.

pradeep

• Oct 3rd, 2011

After the process of distillation of crude we get many undesirable product which are hazardous in nature , if we expose without combustion ,it creates pollution due to this we do combustion of all undesirable product inflar .

tahir hussain

• Sep 24th, 2011

first of all we should have the concept of the gases remove while treating in refinery operations they can be sox , carbon dioxide , carbon mono and other hazardous gases....... now back to key poin...

Improve Answer

You have two layer of material to provide insulation. They have heat transfer co-efficient (k1>k2).How will you obtain better insulation?

E Smardy

• Mar 22nd, 2013

I dont think you can generalise this problem - at least not for flat plane and cylindrical co-ordinates. It really depends on how much bigger k2 is relative to k1 and how big the pipe thickness is relative to the diameter.

Affwan Hassan

 Profile Answers by Affwan Hassan Questions by Affwan Hassan

• Jul 8th, 2011

I do have a question here, If the material of lower insulation be bounded to the first system, doesn't that result in heat loss?

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neeru srangal

 Profile Answers by neeru srangal Questions by neeru srangal

• Aug 17th, 2014

Chemical Potential: Change in Gibbs free energy at const T &P
Fugacity: How much chemical potential of a phase differ from its standard state and its equal to partial pressure in case of ideal gas.

Sumaia afroz mim

• Nov 27th, 2013

1.To calculate free energy.
2.chemical potential is 1 type of force to turn a reaction in equilibrium.
3.chemical potential is comparable to escaping tendency or fugacity,its means the tendency of reaction flow to ewuilibrium point.
4.If chemical potential is high escaping tendency will high.

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What is the important properties of biodegradable plastics?
Which properties helps plastics to resist water?

VIVEK32043

 Profile Answers by VIVEK32043 Questions by VIVEK32043

• Jan 25th, 2017

Biodegradable polymers are those which are decomposed after their useful service life to end products like minerals, oxygen, etc. with the help of micro organisms under normal environmental conditions.

Khalid Ibrahim Jamadar

• May 24th, 2016

Biodegradable polymers, have extremely strong carbon backbones that are difficult to break, such that degradation often starts from the end-groups. Since the degradation begins at the end, a high surf...

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