CHEN3010 Lecture Notes - Lecture 9: Rate Equation, Packed Bed, Volumetric Flow Rate

63 views14 pages
Chemical Reaction Engineering
CHEN3010/5040
Semester 1/2018
Collection and Analysis of Rate Data
Fogler Chapter 7
Lecture 3
Gia Hung Pham
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 14 pages and 3 million more documents.

Already have an account? Log in
Part 2
Heterogeneous Reaction
Fluid-solid reacting system
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 14 pages and 3 million more documents.

Already have an account? Log in
Packed bed reactor (PBR)
PBR is commonly used for heterogeneous reaction.
0L
0
Catalyst bed
A , B
Feed
Product
L
C [mol/l]
CA0
CAE Reactor length [m]
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 14 pages and 3 million more documents.

Already have an account? Log in

Document Summary

We measure the concentration of the reactants at the reactor inlet (feed) and reactor outlet (product). Because of the concentration gradient in the pbr, the concentration-time data from the pbr are not suitable for reaction rate law study. Isothermal is difficult to meet with pbr. Axial and radial temperature gradients are usually present in pbr. We use differential reactor to avoid the concentration and temperature gradient, so that the measured data can be used for rate law study. Very small amount of solid catalyst is used for reaction rate study. * very small axial and radial temperature gradient. Simplification for reaction rate study: ignore concentration and temperature gradient. Reactor as a concentration and temperature gradientless reactor: we use high volumetric flow rate and small catalyst particle to avoid mass transfer limitations. (overall reaction rate is affected by chemical reaction rate and mass transfer rate) Because ca0 cae , we can treat the reaction rate as a function of ca0 r.

Get access

Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers

Related Documents

Related Questions