Chemical Kinetics in Straight, Packed, and Coiled Reactors

1 Chemical Kinetics in Straight, Packed, and Coiled Reactors 

The computer simulations of chemical kinetics in a straight tube reactor [1065] were based on an equation combining diffusion, convection, and reaction terms. The sample dispersion without chemical reactions gave very similar results to that of Vanderslice [1061], yet the value of that paper is that it expanded the study to computation of FIA response curves for fast and slower chemical reactions. The numerically evaluated equation was similar to that of Vanderslice [1061], however with inclusion of a term for reaction rate. Two model systems were chosen and spectro-photometrically monitored in a FIA system with appropriately con- 

The chemical kinetics in a packed reactor have been studied in a detail by Reijn, Poppe, and van der Linden [554] with the aid of the tanks-in-series model. They based their theory on three assumptions that the number of tanks N in the reactor is constant that the chemical reactions are (pseudo) first order and that adequate mixing is ensured. 

When a chemical reaction between analyte A and reagent R results in a detectable product P formed in the presence of a large excess of R, one can write  

It is significant that the preceding conclusions of Reijn et al., obtained for SBSR reactor, are in agreement with the results that Wada et al. [1065] obtained with a straight tube reactor, thus confirming the important conclusion that chemical reactions do not alter the dispersio of the analyte in the reactor. Therefore, the experimental values (D, t, T, and ct ), obtained with a nonreacting tracer alone, are well suited for the description of dispersion in any FIA system in the presence or absence of chemical reaction. 

---