A hydrogen production system includes: a hydrogen production device connected to an electric power system or connected to a power generation device using renewable energy and configured to produce hydrogen by electrolyzing pure water; an output control unit capable of controlling an amount of power supplied from the electric power system to the hydrogen production device according to request from the electric power system; a first pure water line for supplying pure water to the hydrogen production device; a first adjustment device capable of adjusting an amount of pure water supplied to the hydrogen production device via the first pure water line; and a first control unit configured to control the first adjustment device, based on a power amount signal indicating information on an amount of power supplied from the electric power system to the hydrogen production device.

A carbon dioxide recovery system includes an electrochemical cell. The electrochemical cell includes a working electrode, a counter electrode, and an electrolytic solution. The working electrode includes a CO.sub.2 adsorbent. The working electrode and the counter electrode are disposed to sandwich the electrolytic solution therebetween. The CO.sub.2 adsorbent is configured to absorb CO.sub.2 in response to a voltage being applied between the working electrode and the counter electrode and electrons being supplied from the counter electrode to the working electrode. The CO.sub.2 adsorbent is a porous body having pores, and a pore diameter of the pores is larger than an ion diameter of the electrolytic solution.

A process for the separation of electrolyte from the carbon in a solid carbon/electrolyte cathode product formed at the cathode during molten carbonate electrolysis. The processes allows for easy separation of the solid carbon product from the electrolyte without any observed detrimental effect on the structure and/or stability of the resulting solid carbon nanomaterial.

A hydrogen production system includes: a hydrogen production device connected to an electric power system and configured to produce hydrogen by electrolyzing pure water; an output control unit capable of controlling an amount of power supplied from the electric power system to the hydrogen production device according to request from the electric power system; a first pure water line for supplying pure water to the hydrogen production device; a first adjustment device capable of adjusting an amount of pure water supplied to the hydrogen production device via the first pure water line; and a first control unit configured to control the first adjustment device, based on a power amount signal indicating information on an amount of power supplied from the electric power system to the hydrogen production device.

An electrolyser system having an electrolysis stack and a direct current source, in order to generate oxygen and hydrogen as electrolysis gas by electrolysis of a water containing electrolysis medium. The electrolysis stack includes an anode section configured to generate oxygen and a cathode section configured to generate oxygen. Furthermore, the electrolyser system has an anode gas separator configured to separate oxygen from the electrolysis medium and a cathode gas separator configured to separate hydrogen from the electrolysis medium, wherein at least one of the gas separators includes a gas separating section and a gas cooling section, wherein the gas cooling section has a water inlet connected with a water supply, in order to supply cooling water to the gas cooling section of the gas separator, for the direct cooling of the electrolysis gas separated in the gas separating section of the gas separator within the gas cooling section.

A breathing equipment for providing a positive pressure gas includes a gas channel, a hydrogen generating device, a pressurizing device, a mixing device, an atomizing device, and an output device. The hydrogen generating device, the pressurizing device, the mixing device, the atomizing device, and the output device are all coupled to the gas channel. The hydrogen generating device is configured to electrolyze water to generate a gas comprising hydrogen. The pressurizing device selectively accelerates an external gas to generate an accelerating gas. The mixing device is configured to mix the gas comprising hydrogen and the accelerating gas to generate a positive pressure gas. The atomizing device is configured to selectively generate an atomizing gas. The output device is configured to selectively output the gas comprising hydrogen, the positive pressure gas, the gas comprising hydrogen with the atomizing gas, or the positive pressure gas with the atomizing gas.

Embodiments relate to systems and methods for gas delivery for personal medical consumption having safety features. A hydrogen or oxygen gas delivery system herein can include electrolytic cores performing electrolysis-based reactions, and obtain free hydrogen (H2) gas for collection and delivery to a user. In aspects, the electrolytic core(s) can be scaled to produce a sufficient amount of hydrogen (H2) or oxygen (O2) gas so that the user can ingest that gas directly, without a need for storage. The system can be portable, and configured with a delivery tube for transmitting hydrogen or oxygen gas to a user. While safety risks are generally minimal, the system can be configured with sensors to detect fault conditions or hazards such as combustion or overpressure, which can only be caused by deliberate user action to expose gaseous products to flame or spark, and even then would not be likely to trigger violent combustion.

An object of the present invention is to provide a carbon dioxide treatment apparatus, a carbon dioxide treatment method, and a method of producing carbon compounds, which have high energy efficiency from carbon dioxide capture to reduction and a high carbon dioxide loss reduction effect. In a carbon dioxide treatment apparatus 100 including: a capturing device 1 that captures carbon dioxide; and an electrochemical reaction device 2 that electrochemically reduces carbon dioxide, an absorption unit 12 of the capturing device 1 brings an electrolytic solution A composed of a strong alkaline aqueous solution and carbon dioxide gas into contact with each other to dissolve carbon dioxide in the electrolytic solution A and absorb the carbon dioxide, supplies an electrolytic solution B that has absorbed carbon dioxide between the cathode and the anode of the electrochemical reaction device 2, and electrochemically reduces the dissolved carbon dioxide in the electrolytic solution at the cathode.

A controller stops flow of posolyte through a positive electrode chamber of a flow cell to trap the posolyte within the positive electrode chamber and hydraulically isolate the flow cell without stopping flow of negolyte through a negative electrode chamber of the flow cell, discharges the flow cell until hydrogen gas is evolved at a reactive surface of the positive electrode chamber while the posolyte is trapped within the positive electrode chamber, and subsequently discontinues the discharge and restarts the flow of the posolyte through the positive electrode chamber.

A method of producing hydrogen using a water electrolysis system comprising at least an electrolyzer and a purifier for removing oxygen in a hydrogen gas generated in the electrolyzer. The method includes controlling a concentration of oxygen in a hydrogen gas to be introduced to the purifier to be constantly less than 0.5 volume % when the electrolyzer is operated at least under a current density of 0.5 kA/m.sup.2 or greater; and further controlling Ob/Oa to be less than 10.0, where Oa represents the concentration of oxygen in the hydrogen gas to be introduced to the purifier when the electrolyzer is operated under a current density of 2.0 kA/m.sup.2, and Ob represents the concentration of oxygen in the hydrogen gas to be introduced to the purifier when the electrolyzer is operated under a current density of 0.2 kA/m.sup.2.