Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.
TODAY’S LECTURE
Chemical reaction engineering is at the heart of virtually every chemical process. It separates the chemical engineer from other engineers.
Industries that Draw Heavily on Chemical Reaction Engineering (CRE) are:
Chemical Reaction Engineering (CRE) is the field that studies the rates and mechanisms of chemical reactions and the design of the reactors in which they take place.
A chemical species is said to have reacted when it has lost its chemical identity.
The identity of a chemical species is determined by the kind, number, and configuration of that species’ atoms.
The reaction rate is the rate at which a species looses its chemical identity per unit volume.
The rate of a reaction (mol/dm3/s) can be expressed as either
the rate of Disappearance: -rA
or as
the rate of Formation (Generation): rA
Consider the isomerization A$rarr;B
rA = the rate of formation of species A per unit volume
-rA = the rate of a disappearance of species A per unit volume
rB = the rate of formation of species B per unit volume
EXAMPLE: A→B
If Species B is being formed at a rate of 0.2 moles per decimeter cubed per second, ie, rB = 0.2 mole/dm3/s
The rate law is an algebraic equation. For example for the reaction, A→B
The rate law could be of the form
Batch Reactor Mole Balance
CSTR Mole Balance
Plug Flow Reactor
Plug Flow Reactor Mole Balance
Packed Bed Reactor Mole Balance
Reactor Mole Balance Summary
Reaction Engineering
These topics build upon one another
But if you cut corners like this
Then this will happen
