Cstr Definition and 15 Threads

Homework Statement We have a second order reaction: A + B → C + D with -rA = k[A][ B] [A]0 = [ B]0 = 300 mol / m3; τ = 11 minutes. k = 4.0 × 10-4 m3 / (mol × minutes) What is the conversion in a CSTR?Homework Equations I think: τ = ([A]0 - [A]1) / -rA,1 τ = (XA × [A]0) / -rA,1 But since I...

Hello I've been working on a problem that involves finding which reaction order gives a greater conversion for a CSTR over a PFR (Xcstr>Xpfr). I was able to solve the mass balance for each reactor, finding: and Allowing us to equate them. This is where I've been stuck for a while now, how...

I've learned that first thermodynamic law for some open system is in the form of: where total change of system energy ##\frac{\partial E}{\partial \tau }## is equal to the transferred heat and work. Total change of system energy ##\frac{\partial E}{\partial \tau }## is equal to the energy...

Hi, I was asked by my senior to find out what this graph is and how to use it. No details were given as to where they found it. I know already that this is used to compare CSTRs and PFRs performance for first order reactions, but I can't deduce what the expressions Dd/(vxL) and kL/vx are for...

Hi, I need to size a CSTR for the transesterification of tri-glycerides into methyl esters (bio-diesel) by reaction with methanol and NaOH catalyst. The transesterification reaction taken place in 3 reversible steps: TG + CH3OH <--> DG + ME DG + CH3OH <--> MG + ME MG + CH3OH <--> C3H8O3 + ME...

Homework Statement Here is the problem description: Develop an Excel file that given a set of data from an RTD pulse injection will determine the model parameters of the following schematics, and then predict the conversion in a CONTINUOUS reactor with a n-order reaction (where n is not equal...

There is a liquid phase homogeneous reaction going on in an CSTR, which operates at 4 atm. Is it necessary to have pressure relief valve? If so, what will be vent out when the pressure exceeds, since it contains liquid only?

I have obtained the volume of my CSTR, how do I calculate the height and diameter of it? Is there a certain ratio to adhere to for better mixing? Tried reading up the rules of thumbs but no info on that. Tried searching other books too but to no avail.

I'm currently doing a design for my final year studies and it's regarding esterification process. My proposed reactor is CSTR, operating at a temperature of 60C and 400 kPa. Reactants are methanol and jatropha oil with sulphuric acid catalyst. For a commercial scale production of biodiesel...

Hello, I am having some difficulty with levenspiel plots, in particular when dealing with a CSTR and when the reaction rate is increasing with conversion. I will give an example plot to demonstrate my point. Assume we are trying to find the volume of a CSTR necessary to reach a conversion of...

Hello, I have been working on a very interesting problem out of Fogler's Chemical Reaction Engineering. I have completed the problem (parts (a) through (c) which is what i'll do because I've been working on this problem for a while and I'm too tired to do part (d) right now), but I want to...

Hello, Suppose A and B are continuously added into a tank, and exit stream consists of A,B,C, and D. I am a little confused on the following point as I follow the example in my textbook. The reaction is ##A + B → C + D## It says because (and I quote) ''...Because the system is operated at...

Hello, I was wondering, is it the case that a CSTR is an open system because there is flow passing in and out of the tank, thus passing the control volume, so it's open. Similarly for a BSTR, the fact that there is no flow means that it is closed? I mean in that sense, a beaker with a...

I was told to derive cstr design eqns for an upcoming experiment, but I'm not sure of the basis I'm working on or where to start? Is there a web page or recommended bk or PDF that covers all the related equations for cstr?

The Quastion are giving me a graph ploted between 1/-r and X the graph if perfectly parabola but scale between % conversion are not equal. what sould i do if i asked to find the % conversion for PFR and CSTR which has fix volume. if u don't clearly understand what I'm ask u may look up at...