Download presentation

Published byAnahi Goldsborough Modified over 3 years ago

1
**Tutorial 2 solutions Lecturer: Miss Anis Atikah Ahmad**

Tel:

2
**Questions X 0.2 0.4 0.45 0.5 0.6 0.8 0.9 -rA (mol/dm3.min 1.0 1.67 5.0**

The exothermic reaction A--->B + C was carried out adiabatically and the following data recorded: The entering molar flow rate of A was 300 mol/min. (a) What are the PFR and CSTR volumes necessary to achieve 40 % conversion? (b) Over what range of conversions would the CSTR and PFR reactor volumes be identical? (c) What is the maximum conversion that can be achieved in a 105 dm3 CSTR? (d) What conversion can be achieved if a 72 dm3 PFR is followed in series by a 24 dm3 CSTR? (e) What conversion can be achieved if a 24 dm3 CSTR is followed in a series by a 72 dm3 PFR? (f) Plot the conversion and rate of reaction as a function of PFR reactor volume up to a volume of 100 dm3. X 0.2 0.4 0.45 0.5 0.6 0.8 0.9 -rA (mol/dm3.min 1.0 1.67 5.0 1.25 0.91

3
Part (A) What are the PFR and CSTR volumes necessary to achieve 40 % conversion? PFR Volume: Using Simpson One-Third Rule; Recall Simpson One-Third Rule Formula:

4
**Part (A) X 0.2 0.4 0.45 0.5 0.6 0.8 0.9 -rA (mol/dm3.min) 1.0 1.67 5.0**

0.2 0.4 0.45 0.5 0.6 0.8 0.9 -rA (mol/dm3.min) 1.0 1.67 5.0 1.25 0.91 FA0/-rA (dm3) 300 180 60 240 330 Levelspiel Plot VPFR

5
**Part (a) CSTR Volume: Substituting the value of FA0/–rA at X=0.4;**

VCSTR Levelspiel Plot

6
**The volume of both reactors are identical at X=0.4-0.6,**

Part (B) Over what range of conversions would the CSTR and PFR reactor volumes be identical? From Levelspiel Plot; The volume of both reactors are identical at X= ,

7
**Using Simpson One-Third Rule**

Part (B) Over what range of conversions would the CSTR and PFR reactor volumes be identical? Proving by calculation; Volume of PFR Using Simpson One-Third Rule Volume of CSTR

8
Part (c) What is the maximum conversion that can be achieved in a 105 dm3 CSTR? By trial and error, calculate what is X that gives a CSTR volume of 105 dm3 Trial 1: X=0.6, Trial 2: X=0.8, Trial 3: X=0.7, X=0.7 The max conversion can be achieved in 105 dm3 of CSTR is 0.7

9
**Now, we know that the conversion must be between 0.6-0.7.**

Part (d) What conversion can be achieved if a 72 dm3 PFR is followed in series by a 24 dm3 CSTR? FA0=300 mol/dm3 X1=0.4 From part (a) VPFR=72 dm3 VCSTR=24 dm3 By trial and error, calculate what is X2 that gives a CSTR volume of 24 dm3 Trial 1: X=0.6, Trial 2: X=0.7, X2=? Now, we know that the conversion must be between

10
Part (d) What conversion can be achieved if a 72 dm3 PFR is followed in series by a 24 dm3 CSTR? FA0=300 mol/dm3 X1=0.4 VPFR=72 dm3 VCSTR=24 dm3 Trial 3: X=0.64, X2=? X=0.64 X=0.64 can be achieved if a 72 dm3 PFR is followed in series by a 24 dm3 CSTR.

11
Part (e) What conversion can be achieved if a 24 dm3 CSTR is followed in a series by a 72 dm3 PFR? FA0=300 mol/dm3 From part (a) VCSTR=24 dm3 X1=0.4 VPFR=72 dm3 X2=? By trial and error, calculate what is X2 that gives a PFR volume of 72 dm3 Trial 1: X=0.8,

12
Part (e) What conversion can be achieved if a 24 dm3 CSTR is followed in a series by a 72 dm3 PFR? FA0=300 mol/dm3 VCSTR=24 dm3 X1=0.4 VPFR=72 dm3 X2=? By trial and error, calculate what is X2 that gives a PFR volume of 72 dm3 Trial 2: X=0.9,

13
Part (e) What conversion can be achieved if a 24 dm3 CSTR is followed in a series by a 72 dm3 PFR? Trial 3: X=0.91, X=0.91 can be achieved if a 24 dm3 CSTR is followed in a series by a 72 dm3 PFR

14
Part (f) Plot the conversion and rate of reaction as a function of PFR reactor volume up to a volume of 100 dm3? X 0.2 0.4 0.45 0.5 0.6 0.8 0.9 -rA (mol/dm3.min) 1.0 1.67 5.0 1.25 0.91 FA0/-rA (dm3) 300 180 60 240 330 VPFR (dm3) 48 72 76.5 80 84 104 130.5

15
Part (f) Plot the conversion and rate of reaction as a function of PFR reactor volume up to a volume of 100 dm3?

16
THANK YOU

Similar presentations

OK

Kinetics and Reactor Design Kinetics and Reactor Design CHE-402 INSTRUCTOR: Dr. Nabeel Salim Abo-Ghander Chemical Reactions and Rate of Reactions Chapter.

Kinetics and Reactor Design Kinetics and Reactor Design CHE-402 INSTRUCTOR: Dr. Nabeel Salim Abo-Ghander Chemical Reactions and Rate of Reactions Chapter.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on earthquake in bhuj Ppt on financial management system Ppt one hundred days of school Download ppt on mind controlled robotic arms design Ppt on non ferrous minerals and rocks Raster scan and random scan display ppt online Ppt on technology vs science Ppt on barack obama leadership style Ppt on nse national stock exchange Ppt on bank lending regulations