The invention relates to a method for carrying out a
chemical reaction using a reactor device (100 to 400) in which a
reaction tube (2) is arranged in a reactor vessel (1). During one or more first operating
modes, one or more reactants are supplied to the
reaction tube at a first
mass flow rate. During the one or more second operating
modes, the one or more reactants are not supplied to the
reaction tube or the one or more reactants are supplied to the reaction tube at a second
mass flow rate, which is lower at least over
time average. During one or more first operating
modes,
radiant heat is provided at a first
heat flow rate by one or more electrical heating elements (3) in the reactor vessel (1), and during one or more second operating modes,
radiant heat is not provided or is provided at a second
heat flow rate, which is lower at least over
time average. In at least a portion of the reactor vessel (1) provided with one or more heating elements (3), a
gaseous atmosphere is provided in which the
oxygen content is adjusted to a predetermined
volume fraction. During one or more first operating modes, the
volume fraction of
oxygen is adjusted between a first
limit value not less than 500 ppm and a second
limit value not greater than 10%, and during one or more second operating modes, the
volume fraction of
oxygen is adjusted between a first
limit value not less than 500 ppm and a second limit value not greater than 10%. The volume fraction of oxygen is adjusted to a value that is at least on a
time average basis that is higher than during the one or more first operating modes. The object of the invention also comprises the provision of a corresponding reactor device (100 to 400).