Answer / saptarshi

PFR and MFR are basically continuous type reactors while
the batch reactor as its name suggests, is non continuous
type of reactor. however a MFR can be both batch or
continuous.
in a PFR composition varies along the length of the reactor
whereas in a MFR composition of the reactant mixture is
uniform throughout the reactor and same as that in the exit
line. MFRs usually are equipped with an agitating device
(stirrer, agitator) for mixing the reactants but in case of
PFRs mixing takes place pependicular to the direction of
flow of reactants and they do not have any agitating device
as such.

Answer / rajesh kumar bhagat

PFR- plug flow reactor is one where latrel mixing is allowed
but longitudnal mixing that is along the length not allowed.
composition changes along the length.
MFR- mixed flow reactor, composition throughout the reactor
will be same and all calculation will be done on output
composition.
Batch reactor- reactant will placed in reactor and let them
react and after some time or after completion of reaction take
it out.

Answer / v

PLUG FLOW REACTOR and MIXED FLOW REACTOR are basically
continuous type reactors while
the batch reactor as its name suggests, is non continuous
type of reactor. however a MFR can be both batch or
continuous.
in a PFR composition varies along the length of the reactor
whereas in a MFR composition of the reactant mixture is
uniform throughout the reactor and same as that in the exit
line. MFRs usually are equipped with an agitating device
(stirrer, agitator) for mixing the reactants but in case of
PFRs mixing takes place pependicular to the direction of
flow of reactants and they do not have any agitating device
as such.

Answer / praveen

Also in addition to those, in a MFR the concentration of the
reactant drops to a low value at a time whereas for PFR the
concentration of the reactant decreases progressively (i.e
stepwise)and higher conversions can be obtained than MFR for
a given reaction.

Answer / sapna

pfr,mfr are bassically continuous reactor&batch reactor are
non-continuous reactor.

Answer / saeed virk

in pfr the composition will change within the passage of time ,almost when feed is directed to the reactor length.it means composition is not same at inlet and out lat of the reactor.reactor. Cstr is totally vice virsa of this.

Answer / vasista

but u will get same performance equations for batch and pfr why?
and batch reactors will have mean residence time and plug flow reactor has residence time why?

Answer / ravishankarraju

Pfr is continuos reactor wher the flow is plug flow wher there will concentration change along the length of the flow and in mfr there will be mixing all over the reactor which is similar to batch reactor but mfri in mfr the concentration drops suddenly

Answer / hemanth

pfr and cstr are continuos reactors and batch opreate sin
batch mode

R sir, i need placement paper of last years of IOCL in chemical sream...... send me the question paper as soon as possible on my email address.

18 Answers   ABC, IOCL, ONGC,

How fouling effected the heat transfer rate?

0 Answers  

What does capacitor load means? How does it connect?

0 Answers  

CHEMICAL MATERIAL BALANCE - EXAMPLE 2.3 : A 1.5 weight % aqueous salt solution is concentrated to 4 weight % in a single-effect evaporator. The feed rate to the evaporator is F = 7500 kg / h and the feed is at 85 degree Celsius. The evaporator operates at 1 bar. By assuming that only pure solvent of water exists in the form of vapor from the feed, calculate the flow rate of such vapor V.

1 Answers  

QUANTUM COMPUTING - EXAMPLE 32.8 : In quantum computing, a quantum state is given by S = a | 00 > + b | 01 > + g | 10 > + d | 11 >. (a) Find S in term of | 0 > and | 1 > etc. (b) The probability of getting x is P(x). For S = 0.5 | 00 > + 0.5 | 01 > + 0.5 | 10 > + 0.5 | 11 >, find P(0) and P(1). Hint : P(00) + P(01) = P(0) = a x a + b x b, P(10) + P(11) = P(1) = g x g + d x d.

1 Answers  

what are the precautions u are taking while starting HT motors?

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Hi this is aparna.............can any one send drdo question papers on my email id-aparna_patna08@yahoo.com Thanks in advance

2 Answers   DRDO,

Can any one send me the sample test papers of IOCL entry exam to be held on 6th july 2008. Also plz send the interview questions that cud probably be asked........i wud be highly obliged if u can send a few test paers and other stuff @ inderjeetd@gmail.com.........Inderpreet

0 Answers   IOCL,

BIOCHEMICAL ENGINEERING INSTRUMENTATION - EXAMPLE 29.5 : The following formula is used as a reference : (analyte signal) / (internal standard signal) = (f-factor) x (concentration of analyte) / (concentration of internal standard). A solution containing 3 mM of analyte and 4 mM of internal standard gave peak signals of 2 and 3 mamps respectively. Another similar solution containing 2 mM of analyte and 1 mM of internal standard gave peak signals of 1 and 4 mamps respectively. Find the average f-factor.

1 Answers  

Define an additive?

0 Answers  

what is difference between B.Tech. and B.E. in chemical engineering

3 Answers   ONGC, Reliance,

What are some good uses of low-grade steam at 12 atm and 1920c?

0 Answers