Abstract:
Provided is a method for preparing nickel-aluminum alloy powder at low temperature, which is simple and economical and is capable of solving the reactor corrosion problem. The method for preparing nickel-aluminum alloy powder at low temperature includes: preparing a powder mixture by mixing nickel powder and aluminum powder in a reactor and adding aluminum chloride into the reactor (S1); vacuumizing the inside of the reactor and sealing the reactor (S2); and preparing nickel-aluminum alloy powder by heat-treating the powder mixture in the sealed reactor at low temperature (S3).
Abstract:
A dehydrogenation reaction device includes: an acid aqueous solution storage unit including a first aqueous acid solution; a water storage unit including water; and a dehydrogenation reaction unit including a chemical hydride. The dehydrogenation reaction unit receives a second aqueous acid solution in which the first aqueous acid solution and water are mixed, and further reacts the chemical hydride and the second aqueous acid solution to generate hydrogen.
Abstract:
According to one embodiment of the present invention, there is provided a hydrogen extraction reactor, comprising a chamber including an inner space; a reaction unit which is provided to pass through the inside of the chamber and where an endothermic reaction for hydrogen extraction occurs; a heating unit which is provided to be spaced apart from the reaction unit inside the chamber and transfers heat to the inside of the chamber; and a heat transfer material which is provided between the reaction unit and the heating unit in the chamber, wherein the heat transfer material undergoes a phase transition between a gas phase and a liquid phase according to the entry and exit of heat from the heating unit or the reaction unit.
Abstract:
The present disclosure relates to a polymer electrolyte membrane for medium and high temperature, a preparation method thereof and a high-temperature polymer electrolyte membrane fuel cell including the same, more particularly to a technology of preparing a composite membrane including an inorganic phosphate nanofiber incorporated into a phosphoric acid-doped polybenzimidazole (PBI) polymer membrane by adding an inorganic precursor capable of forming a nanofiber in a phosphoric acid solution when preparing phosphoric acid-doped polybenzimidazole and using the same as a high-temperature polymer electrolyte membrane which is thermally stable even at high temperatures of 200-300° C. without degradation of phosphoric acid and has high ion conductivity.
Abstract:
The present specification discloses a membrane reactor comprising a reaction region; a permeate region; and a composite membrane disposed at a boundary of the reaction region and the permeate region, wherein the reaction region comprises a bed filled with a catalyst for dehydrogenation reaction, wherein the composite membrane comprises a support layer including a metal with a body-centered-cubic (BCC) crystal structure, and a catalyst layer including a palladium (Pd) or a palladium alloy formed onto the support layer, wherein ammonia (NH3) is supplied to the reaction region, the ammonia is converted into hydrogen (H2) by the dehydrogenation reaction in the presence of the catalyst for dehydrogenation reaction, and the hydrogen permeates the composite membrane and is emitted from the membrane reactor through the permeate region.
Abstract:
A composite polymer electrolyte membrane for a fuel cell may be manufactured by the following method: partially or totally filling the inside of a pore of a porous support with a hydrogen ion conductive polymer electrolyte solution by performing a solution impregnation process; and drying the hydrogen ion conductive polymer electrolyte solution while completely filling the inside of the pore with the hydrogen ion conductive polymer electrolyte solution by performing a spin dry process on the porous support of which the inside of the pore is partially or totally filled with the hydrogen ion conductive polymer electrolyte solution.
Abstract:
Disclosed are a method for supplying molten carbonate fuel cell with electrolyte and a molten carbonate fuel cell using the same, wherein a molten carbonate electrolyte is generated from a molten carbonate electrolyte precursor compound in a molten carbonate fuel cell and is supplied to the molten carbonate fuel cell.
Abstract:
Disclosed is a carbon support for a fuel cell catalyst that supports a metal. The carbon support includes a conductive carbon support and nitrogen atoms doped into the conductive carbon support. Also disclosed is a method for preparing the carbon support. Also disclosed is a catalyst including the carbon support. The catalyst has greatly improved degradation resistance compared to conventional catalysts for fuel cells. In addition, the catalyst is not substantially degraded even when applied to a single cell.
Abstract:
Disclosed are a method for preparing a pure isophthalaldehyde bisulfite adduct free from impurities through a specific purification process, and use thereof as a starting material for polymerizing polybenzimidazole under a mild condition. According to the present disclosure, it is possible to obtain a pure isophthalaldehyde bisulfite adduct free from impurities, such as unreacted materials or byproducts. In addition, it is possible to accomplish industrial mass production of a high-molecular weight polybenzimidazole by using the adduct as a starting material for polymerizing polybenzimidazole under a mild condition in an organic solvent.
Abstract:
Provided are a ceria-based composition having an undoped or metal-doped ceria and an undoped or metal-doped bismuth oxide, wherein the undoped or metal-doped bismuth oxide is present in an amount equal to or more than about 10 wt % and less than about 50 wt % based on the total weight of the ceria-based composition, and at least one selected from the ceria and the bismuth oxide is metal-doped. The ceria-based composition may ensure high sintering density even at a temperature significantly lower than the known sintering temperature of about 1400° C., i.e., for example at a temperature of about 1000° C. or lower, and increase ion conductivity as well.