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Chromatographic Reactor (chromatographic + reactor)
Selected AbstractsThermal decomposition of tert -butyl peroxide in a gas chromatographic reactor: A comparison of kinetic approachesINTERNATIONAL JOURNAL OF CHEMICAL KINETICS, Issue 7 2004Peter J. Skrdla The thermal decomposition of tert -butyl peroxide is investigated utilizing both the column and the injection port of a commercial gas chromatograph (GC) as chemical reactors. Using the injector liner as the reactor, the chromatographic peak areas of the reactant, measured at various injector temperatures, are used in the determination of the activation energy of the decomposition (Ea). With the column serving as the reactor, both the reactant peak areas and the product peak shapes are similarly utilized for this purpose. Values of Ea obtained using different mathematical treatments for each of the three approaches are found to range from 115 to 164 kJ/mol. Of these methods, the column reactor approach utilizing peak area measurements (referred to as PACR, for "peak area, column reactor") is found to be far superior in terms of its speed, robustness, and its accuracy in determining Ea. The PACR method's effectiveness can be largely attributed to the mathematical treatment that is described in the approach. © 2004 Wiley Periodicals, Inc. Int J Chem Kinet 36: 386,393, 2004 [source] Enhanced hydrogenation in a reverse flow chromatographic reactorAICHE JOURNAL, Issue 5 2006Guillermo A. Viecco Abstract An experimental study of the reverse flow chromatographic reactor is carried with the equilibrium limited hydrogenation of 1,3,5-trimethylbenzene (mesitylene, MES) to 1,3,5-trimethylcyclohexane. The reaction is pseudo first-order when carried out in excess hydrogen. A simple experimental setup is used to evaluate the effects of carrier flow, reactant feed concentration, and amount of catalyst on conversion. Conversions exceeding the thermodynamic equilibrium conversion are obtained for a wide variety of switching times, catalyst amounts, carrier flow rates, and reactant concentrations, showing the robustness of the system. While the qualitative features of the process can be predicted for a simple linear adsorption equilibrium model, the experimental results are best fitted by assuming a linear adsorption isotherm combined with an adjusted interfacial mass-transfer resistance. The experimental results are very similar to those reported in previous research of the same reaction in a simulated moving-bed chromatographic reactor. © 2006 American Institute of Chemical Engineers AIChE J, 2006 [source] Analysis of the reverse flow chromatographic reactorAICHE JOURNAL, Issue 9 2004Hugo S. Caram A reverse flow chromatographic reactor with side feed (RFCR) can be used to improve the conversion and selectivity for irreversible and reversible reaction systems beyond the values obtained from conventional steady-state reactors in the case where the reactants are more strongly adsorbed than the products. It is also simpler than conventional chromatographic, moving, and simulated moving beds and other systems that combine reaction and adsorption separation. The results of the study show the robustness and stability of the system, as well as its capacity to significantly improve conversion and selectivity for several reaction systems, including consecutive reactions. Simulation results of this mathematical model for the hydrogenation of 1,3,5-trymethylbenzene (MES) compare well with previous studies, using countercurrent moving-bed reactors and simulated countercurrent bed reactors. © 2004 American Institute of Chemical Engineers AIChE J, 50: 2266,2275, 2004 [source] | ||||||||||