Abstract: A method of operating a solid oxide cell system comprises generating an electrochemical conversion from one of: (i) water steam H2O(g); and (ii) a mixture comprising water steam H2O(g) and carbon dioxide CO2. A quantity of at least one other substance is added into the one of the water steam H2O(g) and the mixture comprising water steam H2O(g) and carbon dioxide CO2. The at least one other substance comprises a hydrocarbon CmHn. The quantity of the at least one other substance is converted into a syngas CO+H2. An endothermic reforming of the mixed-in hydrocarbons occurs by coupling-in waste heat from the electrochemical conversion. The additional quantity of the at least one substance is added compensate for effects of a degradation of the solid oxide cells of the solid oxide cell system. A total quantity of the hydrogen H2 generated by the solid oxide cell system is kept constant.

Abstract: Soot removal process at or inside a synthesis gas- and/or CO-containing gas production apparatus using as feed gases carbon dioxide, steam, hydrogen and/or a hydrocarbon-containing residual gas and using electrical energy in RWGS processes, electrolyses for electrochemical decomposition of carbon dioxide and/or steam, reforming operations and/or synthesis gas production processes with at least one gas production unit, an electrolysis stack and/or a heater-reactor combination for performing an RWGS reaction and at least one cooling sector/recuperator for CO-containing gas and/or synthesis gas, and also a soot removal assembly. Formation of soot can be suppressed or prevented during gas cooling and soot that is nevertheless deposited can be removed again from the heat exchanger surface.

Abstract: A method of manufacturing a gas heater heating element including a support and channel structure with a plurality of channels formed in the monolith includes shaping an electric heating element and at least partially coating the electric heating element with at least one coating material. The at least partially coated electric heating element is positioned in a mold for producing the monolith. The monolith is produced and surrounds the at least partially coated electric heating element. The coating material of the at least partially coated electric heating element is removed. The gas heater heating element includes at least one electric heating element in the monolith and the electric heating element is guided in the plurality of channels of the support. Heat within the plurality of channels is configured to be transferred by the electric heating element to a gas flowing through the plurality of channels to heat the gas.

Abstract: A solid oxide cell assembly includes a housing that further includes a base plate, a cover and one or more side walls. one or more solid oxide cell stacks are positioned on the base plate. at least one radiant heater element is positioned inside the housing and is configured to emit radiant heat onto the one or more solid oxide cell stacks. the at least one radiant heater element is formed as one of a heating tube and a heating plate and comprises a plurality of separately controllable segments each comprising separate power connections. The solid oxide cell assembly is further formed as a high temperature electrolysis cell assembly.

Abstract: A synthesis gas production process from CO2 and H2O with a co-electrolysis, wherein the CO2 and CH4 content of the produced gas is reduced on the cathode side.

Abstract: An electrolysis method comprising an electrolysis cell (4), which method uses at least one recirculating flushing medium (50, 60). The invention further relates to an electrolysis system, in particular for carrying out the electrolysis method.

Abstract: A process for the production of synthetically produced methane (57)/gaseous and/or liquid hydrocarbons (114, 115, 116, 117). For this purpose, hydrogen (44, 84, 150) from an electrolytic arrangement (41, 81, 151, 159) which is operated by means of regeneratively generated electric energy and carbon dioxide (19, 46, 86) are synthesized in a methane synthesis (FIGS. 2-48) or Fischer-Tropsch synthesis (FIGS. 3-96) or other suitable hydrocarbon synthesis, the carbon dioxide (19, 46, 86) being produced from an air/gas flow (3, 134) by means of a carbon dioxide recovery system (FIG. 1). The carbon dioxide (19, 46, 86) is obtained from the air/gas flow (3, 134) in the carbon dioxide recovery system (FIG. 1) by way of a reversible adsorption process.

Abstract: The invention relates to a fuel cell system comprising a first exothermally operated fuel cell stack and a second non-exothermally operated fuel cell stack, wherein anode waste gas containing water molecules from the first fuel cell stack can be supplied to the second fuel cell stack, and wherein hydrocarbons can be admixed to the anode waste gas by way of a feed line. According to the invention, it is contemplated that the anode waste gas of the first fuel cell stack can be supplied to the second fuel cell stack in an uncooled state. The invention further relates to a method for operating a fuel cell system.

Abstract: The invention relates to a media supply plate (10) for a fuel cell stack (12) comprising at least one anode gas terminal (14) and at least one cathode gas terminal (16). According to the invention the media supply plate (10) further comprises at least one anode waste gas terminal (18) and at least one cathode waste gas terminal (20). The invention further relates to a fuel cell system (52) using such a media supply plate (10) as well as a method for producing such a fuel cell system.

Abstract: Electrolyte for an electrolyte-supported high-temperature fuel cell includes zirconium(IV) oxide doped with from 3.5 mol % to 6.5 mol % of ytterbium(III) oxide. The electrolyte has a thermal expansion coefficient (TEC) based on 30° C. of from 10.6*10?6 K?1 to 11.1*10?6 K?1 at 800° C.

Abstract: The invention relates to an interconnector arrangement for a fuel cell stack, which can be brought into electrical contact with at least one membrane electrode assembly and which is arranged to separate a cathode flow field of the fuel cell stack from an anode flow field of the fuel cell stack. The invention is characterized in that the interconnector arrangement comprises a hollow space separated from the anode flow field and from the cathode flow field such that a flow of gas through the hollow space may not be more than five percent of flow-off gas through the cathode flow field or the anode flow field. The invention also relates to a fuel cell stack and to a method for manufacturing an interconnector arrangement.