Page 291 - Elements of Chemical Reaction Engineering 3rd Edition

Sec. 5.7 Evaluation of Laboratory Reactors 263

will not proceed at a measurable rate and the rate appears to be independent of
concentration above 0.1 M, Consequently, the following higMow values of the
parameters were chosen:
A (1) pH4 (+I pH8
B (--) 10°C (+) 40°C
C (-) 0.005M (+) 0.1 M
This example is discussed further on the CD-ROM.

5.7 Evaluatilon of Laboratory Reactors

The successful design of industrial reactors lies primarily with the reliability of
the experimentally determined parameters used in the scale-up. Consequently,
it is ilmperative to design equipment and experiments that will generate nccu-
rate and meaningful data. Unfortunately, there is usually no single comprehen-
sive laboratory reactor that could be used for all types of reactions and
catalysts. In this section we discuss the various types of reactors that can be
chosen to obtain the kinetic parameters for a specific reaction system. We
closely follow the excellent strategy presented in the article by V. W. Weelanan
of Mobil The criteria used to evaluate various types of laboratory reac-
tors are listed iii Table 5-3.

TABLE 5-3. CRITERIA USED To EVALUATE LABORATORY REACTORS
1. Ease of sampling and product analysis
2. Degree of isothemality
3. Effectiveness of contact between catalyst and reactant
4. Handling of catalyst decay
5. Reactor cost and ease of construction

I6V. W. Weekman, AZChE J., 20, 833 (1974).