Reactor for endothermic high-temperature reactions

A method for carrying out an endothermic reaction for obtaining a product gas from a feed gas, comprising feeding a feed gas into a reactor comprising:

• a pressure jacket;
• an inlet for solid particles and an outlet for said product gas on an upper end of said reactor;
• and
• an outlet for solid particles and an inlet for said feed gas on a lower end of said reactor,
• and which comprises a gravity-driven moving bed in a reaction zone of the reactor interior, which gravity-driven moving bed comprises a plurality of solid material particles, wherein the reactor is also configured to guide the feed gas into the reaction zone, wherein, in order to heat the feed gas, the reactor is configured to heat the solid material particles in the reaction zone by generating an electric current in the solid material particles between a pair of first and second electrodes which are permeable to the solid material particles, the feed gas and the product gas in each case such that, by transferring heat from the solid material particles to the feed gas, the feed gas in the reaction zone can be heated to a reaction temperature in order to react in the endothermic reaction for producing the product gas, and wherein the reactor interior also comprises a first heat integration zone in which heat from the product gas produced in the reaction zone can be transferred to solid material particles of the gravity driven moving bed which are to be guided into the reaction zone, and wherein the reactor interior also comprises a second heat integration zone in which heat from solid material particles of the gravity driven moving bed coming from the reaction zone can be transferred to the feed gas in order to preheat the feed gas, wherein said reaction zone is arranged between said pair of first and second electrodes and said first heat integration zone is arranged above said first electrode, said second heat integration zone is arranged below said second electrode and said first electrode is arranged above said second electrode,
• wherein said outlet for solid particles comprises a control element for the speed of travel or the mass flow of the moving bed which is configured to control a speed of travel of a mass flow of said gravity driven moving bed to be within a range of 0.1 to 2 m/h, wherein
• a plurality of solid material particles is guided into the first heat integration zone and from there into the reaction zone,
• the solid material particles are heated in the reaction zone,
• the solid material particles are guided from the reaction zone into the second heat integration zone and withdrawing said solid material particles from the second heat integration zone at a rate such that the speed of travel of said gravity driven moving bed is within the range of 0.1 to 2 m/h,
• the feed gas is introduced into the second heat integration zone and from there into the reaction zone, wherein the feed gas in the second heat integration zone is heated against solid material particles coming from the reaction zone, wherein the solid material particles are cooled, and wherein the feed gas is contacted with the heated solid material particles in the reaction zone, wherein heat from the heated solid material particles is transferred to the feed gas in order to heat the feed gas in the reaction zone, wherein the feed gas in the reaction zone reacts, producing the product gas,
• the product gas produced is guided from the reaction zone into the first heat integration zone, wherein the solid material particles in the first heat integration zone are preheated against the product gas coming from the reaction zone, wherein the product gas is cooled,
• the product gas is withdrawn from the first heat integration zone, and
• a heat capacity flow of the gas and a heat capacity flow of said solid material particles are adapted to each other.