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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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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Suppose I Have Two Hydrocarbon Mixtures ,Each Mixture Has Known Composition & Freezing Point , Is There Any Empirical Formula To Calculate The Freezing Point Of a Blend Of Those Mixtures?

neeru srangal

 Profile Answers by neeru srangal Questions by neeru srangal

• Aug 17th, 2014

delta T = (Freezing point of pure solvent) - (Freezing point of solution) = kf * m
m= molal conc of solution (moles of solute/ kg of solvent)
kf = freezing point depression constant

Debu

• Feb 7th, 2014

Antoine eq may be used for find out temp if vapor pressure is known for both substance ..then average of that may be answer .

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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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Why ACTIVITY is so useful than considering PARTIAL PRESSURE in thermodynamics point of view?

sekhar reddy

• Apr 1st, 2013

A=f/p,activity coefficient describes the deviation in ideal behavior of any liquid when it a non ideal mixtures ,which is dimensionless

nandha.rajesh

 Profile Answers by nandha.rajesh Questions by nandha.rajesh

• Feb 19th, 2010

I think activity means activity coefficient if it is that then it it is very easy to answer your question. Generally partial pressure term is used when there is mixture means more than one compund is ...

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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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Anyone can help me to explain how to conduct the VLE experiment for propane and heptane compostion? it is possible to use normal stirring extraction method for the experiment? And how much amount of heptane and propane that should i use if i choose the temperature range of 0-60 degree Celcius?

Deepak

• Feb 22nd, 2013

The vapor liquid equilibrium can be determined by their relative volatility and the X-Y values and with these values we make a graph curve on between these two values the vapor liquid equilibrium is achieved.

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srinivas

• Aug 30th, 2012

Scale up the product as per our plant capacity, check for utility requirement, check for availability of equipments, PFD, P&ID preparation, hazard study

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Explain What is Wilson Equation?

mohammadhosein samet

• Jun 4th, 2012

The Wilson equation was published by Grant M. Wilson as Vapor-Liquid Equilibrium. XI. A New Expression for the Excess Free Energy of Mixing

raj kumar sitaliya

• Oct 6th, 2011

Wilson plot /equation is the graphical calculation of convective heat transfer coefficient is proportional to Uexp 0.8.

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Sanjay

• May 14th, 2012

Fugacity gives the degree of escapability of a molecule. and hence in the distillation column, the phase with high fugacity is favored by the molecule and hence there is a degree of separation in it. ...

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What is the role of the chemical engineer in the agricultural sector?

shivam kumar

• Feb 13th, 2012

We chemical engineers can make fertilizers, new water management, pest management etc. if we know to play or work with chemicals we can do many great things.

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How to perform distillation of a mixture of unknown solutions ?

balaji

• Oct 10th, 2011

Based on API gravity we can categorize crude oils into Light crude, Heavy crude or Intermittent crude and accordingly processed. There are also other tests available but this is primary test.

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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...

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What is the life time of FRP tank? Explain about it specifications & other details?

Nagham Aly

 Profile Answers by Nagham Aly Questions by Nagham Aly

• Sep 27th, 2011

FRP (Fibreglass Reinforced Plastics, also known as GRP, or Glass Reinforced Plastics) is a modern composite material of construction for chemical plant equipment like tanks and vessels. Chemical equip...

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Why do we place hydrogen cylinder horizontal position rahter than vertical position?

kati znbc

• Sep 6th, 2011

Hydrogen is lighter than air , if placed vertically,cause the more pressure on the top of the valve of a cylinder , horizontally placing reduces the risk .

kartikey singh rajput

 Profile Answers by kartikey singh rajput Questions by kartikey singh rajput

• Jul 31st, 2011

Cylinders carrying toxic substances, such as sulphur dioxide, must only be transported vertically. Cylinders containing acetylene must always be kept and transported in an upright position.Horizontal...

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Why Iron Carbide diagram can be established upto 6.67% only? What are structure beyond 6.67% carbon.

Samayaraj

• Aug 27th, 2011

Molecular weight of iron carbide(Fe3C) is 179.5

Atomic weight of carbon is 12

Percent carbon = (12/179.5)*100 = 6.67%

aqsa rana

 Profile Answers by aqsa rana Questions by aqsa rana

• Jun 13th, 2010

The iron-iron carbide diagram is only upto 6.67%, because beyond that percentage structure remains the same so we do not study further.

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When salt is added to water, what happens to its freezing point?

vbijendra

 Profile Answers by vbijendra Questions by vbijendra

• Sep 5th, 2009

For pure substances, there is no change in their freezing point, due to addition of impurities, freezing point decreases.

deepakjsd

 Profile Answers by deepakjsd Questions by deepakjsd

• Jul 28th, 2009

Freezing point decreases.

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What is Turkey Red Oil? Where it is used and How it can be formed?

sathishfire

 Profile Answers by sathishfire Questions by sathishfire

• Sep 11th, 2010

Turkey Red Oil is also known as Sulfated Castor Oil. It is the only oil that will completely disperse in water. The oil is expressed from the seed. Sulfa...

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What are the major characteristics of a metal which distinguishes itself from any other metal?

aqsa rana

 Profile Answers by aqsa rana Questions by aqsa rana

• Jun 13th, 2010

There are some important charestristics of metals that distinguish them from other materials, like in some metals (Al), have high strength to weight ratio.  Metals are good conductors of heat and electricity. They are malleable and ductile.   

kirthi.nataraj

 Profile Answers by kirthi.nataraj Questions by kirthi.nataraj

• Aug 19th, 2009

By its melting point, stability and rigidity.

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How does Chromium improve property of Steel when added as an alloy element?

aqsa rana

 Profile Answers by aqsa rana Questions by aqsa rana

• Jun 13th, 2010

Chromium is a very good corrosion resistant element, when it is added ad as an alloying element, especially in steel to form stainless steel, it acts as a corrosion resistant material, so improves its life (fatigue).

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