Verfahren zur endothermischen Umsetzung von Kohlenwasserstoffen, ihre Anwendung und Vorrichtung zur Anwendung dieses Verfahren

摘要

A process for the conversion of hydrocarbons by an overall endothermic reaction involves a charge passing through at least two reaction zones each containing a solid catalyst with intermediate re-heating zones of the current from the first zone (ST) before passing into the second reaction zone. A process for the conversion of hydrocarbons by an overall endothermic reaction involves the charge passing through at least two reaction zones each containing a solid catalyst with intermediate re-heating zones of the current from the first zone (ST) before passing into the second reaction zone. The re-heating is effected in a heat exchanger with heat transfer mainly by convection by means of a thermal fluid (TF) of coking sensitivity index (CS) lower than that of the current (ST).The fluid TF is heated in an oven up stream of the exchanger to a level such that the temperature difference, DELTA T between the fluid TF entering the exchanger and the ST temperature leaving the exchanger is less than 250 degrees C. Independent claims are included for: (1) the use of the process; and (2) the installation for effecting the operation.