ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The effects of diffusional and mass transfer resistances on the optimal distribution of a bifunctional catalyst were studied for the case where each catalyst is supported on a separate carrier in the packed bed of a plug flow, tubular reactor. The width of the segment requiring a catalyst mixture is reduced by the presence of transport resistance due to shifts of both switching points away from the ends of the reactor. The extent of the change in each of the two switching point locations depends upon the relative magnitudes of the effectiveness factors for the two reactions, as does also the change of packing policy in the singular segment. As observed in Part I, the first switching location is again independent of the dimensionless residence time; in the presence of the transport resistance, however, the first switching location increases by the multiplier of the respective inverse effectiveness factors. The results from previous numerical studies were shown to be particular cases of these general analytic results, and one specific reaction scheme with first-order kinetics was studied in detail for illustration.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690240207
