A fuel producing system includes an electrolyzer that is supplied with a raw material gas containing carbon dioxide and water vapor, and electrolyzes the raw material gas to generate a product gas containing hydrogen and carbon monoxide, and a first gas-liquid separator that performs gas-liquid separation on the product gas generated in the electrolyzer. Water vapor produced from water separated in the first gas-liquid separator or water vapor produced from water from a water supply source is allowed to be supplied to the electrolyzer in addition to the raw material gas.

The techniques described herein relate to methods for the synthesis of ammonia from nitrogen and hydrogen, the methods including use of plasma, such as a microjet plasma, in a first reaction chamber to generate a vibrationally exited nitrogen atom or nitrogen containing molecule, optionally wherein the excited nitrogen atom or molecule is reacted with hydrogen in an aqueous medium, optionally wherein the medium is then recycled to remove soluble products. A system for carrying out such methods is also provided.

An embodiment of the present disclosure relates to a hydrogen supply system including a water electrolysis stack configured to produce hydrogen by electrochemically decomposing water, and a metal hydride compressor connected to the water electrolysis stack and configured to treat the hydrogen before supplying the hydrogen to a supply destination, thereby obtaining an advantageous effect of simplifying a structure and improving spatial utilization and a degree of design freedom.

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.

A system for synthesizing ammonia includes a reactor including an inlet portion, an outlet portion, and an energy source arranged to deliver energy to one or more reactants receivable through the inlet portion of the reactor, and the energy source activatable to reduce nitrogen to ammonia in the presence of hydrogen, at least one hydrogen pump in fluid communication with the outlet portion of the reactor, each hydrogen pump including at least one electrochemical cell, and a recirculation circuit in fluid communication between the at least one hydrogen pump and the inlet portion of the reactor and configured to direct a respective hydrogen stream from each hydrogen pump to the inlet portion of the reactor.

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 allow 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 system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and/or altering the process conditions to alter the output composition.

A distributed hydrogen generating fence is formed from a plurality of electrolysis units and fence posts. Each unit includes one or more PV cells, an associated electrolysis system powered by electricity generated by the one or more PV cells, and a feed header for feeding water and an electrolyte to the electrolysis system. The electrolysis system is inside the feed header, and is operable to produce hydrogen and oxygen. The units are located between and are supported by mutually adjacent fence posts. The feed header extends in an inclined manner between the mutually adjacent fence posts. A gas header conducts at least the hydrogen from each of the plurality of units to a first remote facility. The fence includes openings allowing the passage of animals, people or vehicles. The openings can be controlled by a gate, or a grate laid across a hole in the ground spanning the opening.

A device for producing an azo compound includes a reaction unit in which a first solution comprising a hydrazo compound and at least one type of M.sub.aX.sub.b; a negative electrode disposed to be in direct contact with the hydrazo compound inside the reaction unit; and a positive electrode disposed inside the reaction unit so as to be in contact with the solution. X is a halogen element, M is at least one selected from the group consisting of hydrogen, Li, Na, K, Mg, Ca, Mn, Fe, Ni, Cu, Ag, Zn, Sn, Zr, and Ti, or at least one selected from the group consisting of a primary ammonium ion, a secondary ammonium ion, and a tertiary ammonium ion, H is hydrogen, and a and b are each independently any one integer between 1 and 4.

A system and method for treating flue gas of a boiler based on solar energy are provided, wherein a heat pump is connected with a heat collector via first and second valves, a carbon dioxide electrolysis chamber is connected with a flue gas pretreatment chamber and a power distribution control module for electrolyzing and reducing carbon dioxide, a gas phase separation chamber is connected with a gas phase outlet to separate a mixture, and discharge the separated gas phase products; a Fischer-Tropsch reaction chamber is connected with the gas phase separation chamber to pass the separated carbon monoxide and hydrogen into a flowing reaction cell, a liquid phase product separation chamber is connected with a liquid phase outlet to separate the liquid phase hydrocarbon fuel products, and separate and supplement electrolyte; an electrolyte cooling circulation chamber is connected with the liquid phase product separation chamber.