Page 300 - Introduction to chemical reaction engineering and kinetics

11.1 Process Design and Mechanical Design 281

flow pattern (backmix flow, tubular flow, etc.)
contacting pattern (cocurrent, countercurrent, crosscurrent flow of phases;
method of addition of reactants-all at once? in stages? which phase dis-
persed? continuous?)
thermal
adiabatic
isothermal
nonisothermal, nonadiabatic
use of recycle
(5) process conditions
T(T profile)
P( P profile)
feed (composition, rate)
product (composition, rate)
(6) optimality
of process conditions
of size
of product distribution
of conversion
of cost (local, global context)
(7) control and stability of operation
instrumentation
control variables
sensitivity analysis
catalyst life, deactivation, poisons
(8) socioeconomic
cost
environmental
safety
(9) materials of construction; corrosion
(10) startup and shutdown procedures

Most of these matters are subjects for exploration in the following chapters, but some
are outside our scope. Some may be specified ab in&, and others may provide con-
straints in various ways.

11.1.1.3 Data Required
Data required include those specific to the situation in hand (design specifications) and
those of a more general nature:

(1) specifications
reactants
products
throughput or capacity
(2) general data
rate data/parameters relating to
reaction (rate law(s))
heat transfer
diffusion
mass transfer
pressure drop