Packing, catalytic

Design of Packed Catalytic Reactors John Beek... 

See also Packed catalytic tubular reactors Ca,surface evaluation, 25 276-279 methodology for, 25 270-309 nomenclature related to, 25 316-321 species concentrations in the bulk gas phase, 25 272-273... 

Ideal isothermal packed catalytic tubular reactors, 25 286-287 Ideal isothermal tubular reactors,... 

Packed-bed reactors, 21 333, 352, 354 Packed beds, 25 718 Packed catalytic tubular reactor design with external mass transfer resistance, 25 293-298 nonideal, 25 295... 

Tubular reactor, 14 722, 20 216-217, 25 269. See also Packed catalytic tubular reactors... 

The starting point of a number of theoretical studies of packed catalytic reactors, where an exothermic reaction is carried out, is an analysis of heat and mass transfer in a single porous catalyst since such system is obviously more conductive to reasonable, analytical or numerical treatment. As can be expected the mutual interaction of transport effects and chemical kinetics may give rise to multiple steady states and oscillatory behavior as well. Research on multiplicity in catalysis has been strongly influenced by the classic paper by Weisz and Hicks (5) predicting occurrence of multiple steady states caused by intrapellet heat and mass intrusions alone. The literature abounds with theoretical analysis of various aspects of this phenomenon however, there is a dearth of reported experiments in this area. Later the possiblity of oscillatory activity has been reported (6). 

In a chemical packed-bed reactor in which a highly exothermic reaction is taking place conditions may be encountered under which, for a given set of input conditions (feed rate, temperature, concentration), the exit conversion is either high or low. To the experimental study of conditions connected with the existence of multiple steady states in packed catalytic reactors has not been paid as much attention in the past as to the study of... 

In this paragraph, based on experimental observations, we are going to review a number of observed facts which may help to elucidate the lows governing the occurrence of multiple steady states in tubular packed catalytic reactors. 

Beek, J., "Design of Packed Catalytic Reactors " Advances in Chemical Engineering, Vol. 3, p. 231, Academic Press, 1962. 

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