Reactor for carrying out an autothermal gas-phase dehydrogenation

A reactor in the form of a cylinder having a vertical longitudinal axis for carrying out an autothermal gas-phase dehydrogenation of a hydrocarbon-comprising gas stream by means of an oxygen-comprising gas stream to give a reaction gas mixture over a heterogeneous catalyst which is configured as a monolith, wherein

• one or more catalytically active zones each comprising a packing composed of monoliths stacked next to one another and/or above one another are arranged in the interior space of the reactor and a mixing zone having fixed internals is provided upstream of each catalytically active zone,
• with one or more feed lines for the hydrocarbon-comprising gas stream to be dehydrogenated at the lower end of the reactor,
• with one or more independently regulable feed lines, where each independently regulable feed line supplies one or more distributors, for the oxygen-comprising gas stream into each of the mixing zones and
• with one or more discharge lines for the reaction gas mixture of the autothermal gas-phase dehydrogenation at the upper end of the reactor,
• where the interior wall of the reactor is provided over its entire area with an insulation layer, and
• where the one or each of the plurality of catalytically active zones each comprising a packing composed of monoliths stacked next to one another and/or above one another including
• the mixing zone having fixed internals and being provided upstream of each catalytically active zone,
• the one or more independently regulable feed lines, and
• the one or more distributors, each supplied by one independently regulable feed line, is designed as one component which can individually be mounted and removed.