Zur Kinetik der Kontakteliminierung von Chlorwasserstoff aus Äthylchlorid im Strömungsreaktor

摘要

The kinetics of the catalytic elimination C2H5Cl→C2H4+ +HCl over MgSO4and Al2O3was studied at pressures between 2 and 35 torr and in the temperature range 280° to 430° C. A flow apparatus was used with He as carrier gas. Influences of diffusion and back reaction were avoided. At a given initial pressure the reaction obeys a first order kinetic law over the whole conversion. However, the rate constant decreases with increasing initial pressure. This is interpreted with aLangmuirtype adsorption. The specific activity of MgSO4(activation energy 28 kcal/mol) is roughly 1000 times higher than that of Al2O3(activation energy 21 kcal/mol). This is due to a higher frequency factor of Mg