6results about How to "High hydrogen yield" patented technology

The present invention provides a catalyst for producing hydrogen by electrolysis of water, and a preparation method and application thereof, wherein the catalyst comprises a carbon nanofiber carrier and a NiXY alloy supported on the carbon nanofiber carrier, wherein X is one of Fe and Co, and Y is one of Pt, Ir, and Ru; and the molar ratio of Ni, X, and Y is 2-4:1:0.1-0.3. The catalyst provided by the present invention has a high catalytic rate and stability, can significantly improve the reaction rate of producing hydrogen by electrolysis of water, and reduce the reaction cost.

This invention discloses an ethanol reforming hydrogen production device based on a photothermal-driven vapor phase reaction, comprising a shell, a support, a porous transport layer, a porous evaporation layer, and a porous catalyst layer. The porous transport layer is placed inside the shell, and the porous evaporation layer is placed on top of the porous transport layer. The support is located outside the porous transport layer and the porous evaporation layer, serving to support the porous catalyst layer and suspend it above the porous evaporation layer. The porous transport layer and the porous evaporation layer are made of SiO2, Ti4O7, and carbomer; the porous catalyst layer is made of SiO2, Ti4O7, carbomer, photothermal material Fe2O3, and catalyst Pt. This invention utilizes the photothermal effect of solar energy to locally generate heat at the reaction site, resulting in high hydrogen production, high product selectivity, and no CO2 emissions, making it suitable for efficient and green industrial hydrogen production.

The application provides a chemical chain reaction hydrogen production system and method. The system comprises a hydrocarbon conversion syngas reactor, a first gas-solid separation device, a syngas oxidation reactor, a second gas-solid separation device, a hydrogen production reactor and a third gas-solid separation device; the product outlet of the hydrocarbon conversion syngas reactor is connected with the feed inlet of the first gas-solid separation device, the gas phase product outlet of the first gas-solid separation device is connected with the gas feed inlet of the syngas oxidation reactor, the gas phase product outlet of the syngas oxidation reactor is connected with the feed inlet of the second gas-solid separation device, the solid phase product outlet of the syngas oxidation reactor is connected with the solid feed inlet of the hydrogen production reactor, and the product outlet of the hydrogen production reactor is connected with the feed inlet of the third gas-solid separation device. The technical scheme provided by the application can realize continuous methane efficient conversion, carbon dioxide capture and high hydrogen production rate and hydrogen purity.

The invention discloses a ternary iron-based oxygen carrier with a core-shell structure as well as a preparation method and application of the ternary iron-based oxygen carrier. The particle size of the ternary iron-based oxygen carrier with the core-shell structure is 150-350 [mu] m, and a core is a quasi-nano particle and is formed by compounding Fe2O3, ZrO2 and LaFeO3 according to the mass ratio of 6: 1: 3. The preparation method comprises the following steps: dissolving a water-soluble salt of a shell material in deionized water to obtain a mixed solution, stirring and heating, dropwise adding a calculated amount of citric acid, and heating the mixed solution to obtain a chelating solution; the preparation method comprises the following steps: preparing nuclear material quasi-nano-particles by a coprecipitation method, dispersing the nuclear material quasi-nano-particles in an ethanol aqueous solution, performing ultrasonic treatment, standing, and removing supernatant liquid to obtain a quasi-nano-particle suspension; and pouring the suspension into the chelating solution, stirring, heating, decomposing, calcining, grinding and screening to obtain the ternary iron-based oxygen carrier particles with the core-shell structure. The oxygen carrier with the core-shell structure can bear the high temperature of 800-950 DEG C, and the cycling stability, the reaction activity and the anti-sintering characteristic of the oxygen carrier are greatly superior to those of a homogeneous oxygen carrier when the oxygen carrier is applied to chemical looping hydrogen production.

The invention relates to a method for hydrogen production through photoelectric iron concerted catalysis of biomass reforming, which comprises the following steps: placing biomass and derivatives thereof in an aqueous solution, adding an iron salt catalyst and an inorganic sodium salt or lithium salt electrolyte, and bubbling to remove oxygen; a graphite electrode is used as an anode, Ni, Cu, Mg or a graphite electrode is used as a cathode, a current of 1-50 mA is introduced for electrolysis, an illumination reaction is carried out at 20-40 DEG C, the illumination intensity is 3-20 W, and the illumination wavelength is 400-480 nm; after the reaction is finished, the hydrogen yield is measured through GC, and the hydrogen yield is calculated according to hydrogen production through photocatalytic glucose reforming; under the conditions of normal temperature, normal pressure and no addition of additives, a photoelectric combination mode is adopted, cheap non-noble metal iron is used as a catalyst, iron and biomass molecules form a complex, and the complex is subjected to a ligand-to-metal charge transfer process (LMCT) under the condition of visible light, so that C-C bonds of the biomass molecules are sequentially broken to carbon dioxide and protons, and the carbon dioxide and the protons are obtained. And hydrogen desorption is carried out by using electrochemical cathode reduction protons, so that efficient conversion of hydrogen production by reforming biomass with water is completed.

The invention provides an aluminum alloy for hydrogen production and a preparation method thereof. The aluminum alloy for hydrogen production comprises the following elements in percentage by mass: 80-96% of aluminum, 1.25-10% of gallium, 2-18% of indium and tin and 0.1-5% of water-soluble inorganic salt. Wherein the water-soluble inorganic salt contains a chlorine element. The aluminum alloy for hydrogen production is doped with the water-soluble inorganic salt aluminum alloy containing the chlorine element, the hydrogen yield of the aluminum alloy for hydrogen production can be increased, meanwhile, under the condition of the same hydrogen yield, the doping amount of precious metal gallium, indium and indium can be reduced through doping of the water-soluble inorganic salt, and therefore the production cost can be reduced. In addition, the aluminum alloy for hydrogen production can be used for hydrogen production in a block shape, transportation and storage are convenient, the preparation process can be simplified, and energy consumption can be reduced.