Ch4: Reactor Engineering

Question 1

Time (t or theta) =

Answer 1

V/Q

Question 2

Reactor types

Answer 2

Batch, CSTR, CSTR in series, PFR, DPFR

Question 3

Batch reactors

Answer 3

Not a continuous stream
Completely mixed
Unsteady state
Uniform

Question 4

CSTR (complete mix reactor)

Answer 4

Continuous flow
Instantaneous
Fill corners with concrete
Reactor volume larger than batch

Question 5

PFR

Answer 5

Little or no mixing

Question 6

DPFR

Answer 6

Slight mixing(more realistic)

Question 7

Batch reactor advantages/disadvantages

Answer 7

Flexible, low capital cost, high conversion, small reactor

Always unsteady, high operating cost, hard to control quality

Question 8

PFR advantages/disadvantages

Answer 8

Steady, low capital cost, highest conversion

Less flexible, long reactor, difficult to control temperature

Question 9

CSTR advantages/disadvantages

Answer 9

Constant with time, easier to control, better quality control, lowest operating cost

Lowest conversion, bigger reactor, high capital cost