Method for operating a plant for the steam reforming of hydrocarbons and corresponding plant
A method for operating a plant for the steam reforming of hydrocarbons, in particular methanol, in which, in a mixture-preparation stage, a steam/hydrocarbon mixture is prepared from water and at least one hydrocarbon. The prepared steam/hydrocarbon mixture is introduced into a reforming reactor. The steam/hydrocarbon mixing ratio is set or adapted in order to compensate for an aging-related long-term shift in a temperature profile within the reforming reactor.
1. A method for operating a plant for the steam reforming of hydrocarbons, comprising:
providing a control circuit including a control unit, a mixture preparation stage, a reactor having a reformer and a CO oxidation stage, and a temperature sensor,
in the mixture-preparation stage, generating a steam/hydrocarbon mixture from water and at least one hydrocarbon;
introducing the prepared steam/hydrocarbon mixture into the reformer of the reforming reactor; and
counteracting an aging-related shift in a temperature profile within the reforming reactor by setting a steam/hydrocarbon mixing ratio of the steam/hydrocarbon mixture generated in the mixture-preparation stage as a function of a temperature of a reformate gas stream emerging from the CO oxidation stage of the reforming reactor.
2. A method according to claim 1 , wherein the temperature of the reformate gas stream is regulated to a constant value by setting the steam/hydrocarbon mixing ratio.