Abstract: The invention relates to a method for operating in hot stand-by mode a fuel cell (SOFC) or a high-temperature electrolysis or co-electrolysis reactor (1), with a stack of solid oxide elementary electrochemical cells (SOEC), the method comprising, during a given period of absence of an electric current respectively flowing out of or applied to the stack or when it is sought to raise or lower the temperature of the cell or reactor, a step of supplying compartments on the side of the hydrogen/water electrodes (H2/H2O) with pulses of a safety gas at regular time intervals during the given period, or when the cell voltage drops below a threshold value, so as to renew the gas(es) present in said compartments.

Abstract: A system includes a high temperature electrolyser, a first supply line of the electrolyser configured to supply steam, a first discharge line of the electrolyser configured to discharge dihydrogen, a second discharge line of the electrolyser configured to discharge dioxygen, a first heat exchange module configured to provide heat exchange between the first supply line and the first discharge line, and a steam generator arranged on the first supply line and configured to produce steam from liquid water. The system also includes a module for recovering thermal energy from the dihydrogen at the output of the module for the benefit of the first steam supply line, the module having a compressor arranged in the first discharge line and configured to compress the dihydrogen, and a first heat exchanger arranged between the first supply line and the first discharge line to transmit thermal energy of the compressed dihydrogen to liquid water.

Abstract: A system for high-temperature reversible electrolysis of water, characterised in that it includes: a high-temperature reversible electrolyser, configured to operate in SOEC (solid oxide electrolyser cell) mode to produce hydrogen and store electricity, and/or in SOFC (solid oxide fuel cell) mode to withdraw hydrogen and produce electricity; a hydride tank, thermally coupled with the reversible electrolyser, the system being configured to allow the recovery of heat released by the hydride tank during hydrogen absorption in order to produce pressurised steam intended for entering the reversible electrolyser in SOEC mode, and to allow the recovery of heat released by the one or more outgoing streams from the reversible electrolyser in SOFC mode so as to allow the desorption of hydrogen from the hydride tank.

Abstract: The application relates to a process for operating in starting mode or in stand-by mode a unit, termed power-to-gas unit, comprising a number N of reactors (1) with a stack of elemental electrolysis cells of solid oxide type (SOEC), the cathodes of which are made of methanation reaction catalyst material(s).

Abstract: A system for high-temperature reversible electrolysis of water, characterised in that it includes: a high-temperature reversible electrolyser, configured to operate in SOEC (solid oxide electrolyser cell) mode to produce hydrogen and store electricity, and/or in SOFC (solid oxide fuel cell) mode to withdraw hydrogen and produce electricity; a hydride tank, thermally coupled with the reversible electrolyser, the system being configured to allow the recovery of heat released by the hydride tank during hydrogen absorption in order to produce pressurised steam intended for entering the reversible electrolyser in SOEC mode, and to allow the recovery of heat released by the one or more outgoing streams from the reversible electrolyser in SOFC mode so as to allow the desorption of hydrogen from the hydride tank.

Abstract: The application relates to a process for operating in starting mode or in stand-by mode a unit, termed power-to-gas unit, comprising a number N of reactors (1) with a stack of elemental electrolysis cells of solid oxide type (SOEC), the cathodes of which are made of methanation reaction catalyst material(s).

Abstract: A computer implemented method and system is described to respond to a disruption of airline flights during a flight disruption period. The method includes detecting an occurrence of a flight disruption period and iteratively re-accommodating disrupted passengers to flights leaving after an end of the flight disruption period based on responses of disrupted passengers to re-accommodation proposals communicated to the disrupted passengers. In the method iteratively re-accommodating is performed so as to attempt to minimize a number of no-show disrupted passengers for those flights leaving after the end of the disruption period.