To reduce the emission of carbon dioxide and improve the energy efficiency in a hydrogen supply system. The hydrogen supply system ( 1 ) comprises: a reformer ( 5 ) for performing steam reforming of a hydrocarbon; a shift reaction unit ( 6 ) for producing a gas containing hydrogen and carbon dioxide by causing a water gas shift reaction of a gas obtained from the reformer; a first absorber ( 36 ) for absorbing the carbon dioxide contained in the gas obtained from the shift reaction unit in an absorption liquid; a hydrogenation reaction unit ( 8 ) for producing a hydrogenated aromatic compound by causing a hydrogenation reaction of an aromatic compound with a gas that has passed through the first absorber; and a regenerator ( 37 ) for separating the carbon dioxide from the absorption liquid by re-circulating the absorption liquid from the first absorber and heating the absorption liquid with heat generated from the hydrogenation reaction.

Hydrogen supply system and hydrogen supply method

The invention discloses a zero-carbon-emission fossil fuel power generation method and device system, wherein the method comprises the steps that geological exploration is carried out to select a carbon dioxide sequestration layer, a fossil fuel power generation plant is built at a place above the selected carbon dioxide sequestration layer, a fossil fuel is subjected to oxygen-blowing oxygen-rich combustion power generation in the power generation plant, generated electrical energy is transported to the outside, and generated carbon dioxide-rich flue gas is injected to the carbon dioxide sequestration layer on the spot; the horizontal distance between the carbon dioxide-rich flue gas generation place and the carbon dioxide sequestration layer injection place is close, and carbon-rich flue gas containing 50% -95% of carbon dioxide is directly injected into the carbon sequestration layer, so that a long-distance transportation link between a carbon capture link and the carbon sequestration link is omitted, the carbon capture cost and the whole process CCS cost can be greatly reduced, and thus zero-carbon-emission fossil fuel power generation is economically feasible to achieve.

Zero-carbon-emission fossil fuel power generation method and device system

Provided is a hydrogen production technique by which it is possible to achieve high hydrogen production efficiency and stably perform operational control even when the power supplied to the electrolysis cell fluctuates. This hydrogen production apparatus 10 is provided with: a selector unit 50 for selecting an electrolysis cell 11 supplied with power, depending on fluctuation of the power supplied to the electrolysis cell 11; a first temperature control unit 51 for holding the temperature of the electrolysis cell 11 at a prescribed temperature, using a heater 13 provided to the interior of the reaction vessel 12; a first flow rate control unit 41 for adjusting the flow rate of water supplied to a water vapor generator 14, and holding constant the flow rate of high-temperature water vapor inputted to the electrolysis cell 11; and a second flow rate control unit 42 for adjusting the flow rate of hydrogen-occluding material supplied to a hydrogenation reactor 16, depending on fluctuation of the power.

Apparatus and method for hydrogen production using high-temperature water vapor electrolysis

The purpose of the present invention is to provide a methane production system which consumes less energy as the whole system and a methane production method. A methane production system comprising an electric power generation facility provided with a boiler 101 which generates steam, a steam turbine 102 which is driven by the steam and a feed-water heater 106 which heats water and feeds the water to the boiler 101, a carbon dioxide collection unit by which carbon dioxide contained in the gas discharged from the electric power generation facility is collected and removed, and a methanation reactor 301 in which the removed carbon dioxide is reacted with hydrogen supplied externally and thus converted into methane, wherein the temperature of the reaction heat upon the methanation in the methanation reactor 301 is elevated by the steam discharged from the steam turbine 102, and then the temperature-elevated reaction heat is fed to the hydrogen, the removed carbon dioxide and the carbon dioxide collection unit, and subsequently to the feed-water heater 106.

Methane production system and methane production method

The invention relates to a process for the dehydrogenation of a carrier medium of hydrogen, comprising the process steps of providing a metal-containing catalytic material, an at least partially charged carrier medium of hydrogen, and a metal-free reaction accelerator substance, transferring the hydrogen from the carrier medium of hydrogen onto the reaction accelerator substance, and releasing hydrogen gas from the reaction accelerator substance.

Process and device for the dehydrogenation of a carrier medium of hydrogen

PROBLEM TO BE SOLVED: To recycle carbon dioxide from a plurality of plants, and enhance energy utilization efficiency in the plurality of plants complementarily using carbon dioxide generated in the plurality of plants, and hydrogen based on an organic chemical hydride method.SOLUTION: An energy utilization system 1 includes: a carbon dioxide storage apparatus 12 for storing carbon dioxide generated from a plurality of plants 2-5; a dehydrogenation reaction apparatus 32 for generating hydrogen from an organic hydride by dehydrogenation reaction; and a reverse shift reaction apparatus 41 for obtaining a mixed gas of hydrogen and carbon dioxide by reverse shift reaction using the hydrogen from the dehydrogenation reaction apparatus 32 and the carbon dioxide from the carbon dioxide storage apparatus 12. The system is so configured that the dehydrogenation reaction apparatus uses heat generated from at least one plant of the plurality of plants in the dehydrogenation reaction, and the mixed gas is introduced to at least one plant of the plurality of plants.

Energy utilization system, and energy utilization method

PROBLEM TO BE SOLVED: To provide a hydrogen and synthetic natural gas production apparatus and method in which the heat efficiency is improved.SOLUTION: A hydrogen and synthetic natural gas production apparatus 1 comprises a synthetic natural gas generation apparatus 2 for generating synthetic natural gas from hydrogen and carbon dioxide by reverse shift reaction and methanation reaction, and a hydrogen generation apparatus 3 for generating hydrogen from hydrogenated aromatic compound by dehydrogenation reaction. In order to utilize the reaction heat of the methanation reaction which is an exothermic reaction, in the dehydrogenation reaction which is an endothermic reaction, the heat is supplied from the synthetic natural gas generation apparatus to the hydrogen generation apparatus.

Hydrogen and synthetic natural gas production apparatus and method

PROBLEM TO BE SOLVED: To stably obtain energy consumed for production of raw material water for water electrolysis at a low cost when hydrogen used for hydrogenation of aromatic compounds is produced by water electrolysis.SOLUTION: A hydrogen production system 1 comprises: a power generator 11 that generates power using renewable energy; a water electrolysis device 12 that produces hydrogen by electrolysis of raw material water using the power; a hydrogenation device 14 that adds the hydrogen to aromatic compounds by a hydrogenation reaction to generate organic hydride; and a fresh water generator 13 that produces the raw material water by an evaporation method. The fresh water generator 13 is constituted to use heat of reaction in the hydrogenation device 14 in the production of the raw material water.

Hydrogen production system, hydrogen storage and transportation system provided with the same, and hydrogen production method

PROBLEM TO BE SOLVED: To inhibit, by targeting an energy supply system for supplying hydrogen and electric power, the emission of carbon dioxide attributed to power generation.SOLUTION: The provided energy supply system is furnished with: a power generator 7 for converting, into an electric power, an energy resulting from the combustion of a fossil fuel; a dehydrogenating reaction apparatus 4 for generating, via a dehydrogenating reaction, hydrogen from a hydrogenated aromatic compound; and a methanation reaction apparatus 6 for generating, via a methanation reaction, methane from carbon dioxide within an exhaust gas generated as a result of combustion in the power generator and hydrogen generated from the dehydrogenating reaction apparatus. In the power generator, the methane generated from the methanation reaction apparatus is combusted together with the fossil fuel.

Energy supply system and energy supply method

To reduce the emission of carbon dioxide and improve the energy efficiency in a hydrogen supply system. The hydrogen supply system (1) comprises: a reformer (5) for performing steam reforming of a hydrocarbon; a shift reaction unit (6) for producing a gas containing hydrogen and carbon dioxide by causing a water gas shift reaction of a gas obtained from the reformer; a first absorber (36) for absorbing the carbon dioxide contained in the gas obtained from the shift reaction unit in an absorption liquid; a hydrogenation reaction unit (8) for producing a hydrogenated aromatic compound by causing a hydrogenation reaction of an aromatic compound with a gas that has passed through the first absorber; and a regenerator (37) for separating the carbon dioxide from the absorption liquid by re-circulating the absorption liquid from the first absorber and heating the absorption liquid with heat generated from the hydrogenation reaction.

Shirasaki Tomohiko

Papers

Energy utilization system, and energy utilization method

Hydrogen and synthetic natural gas production apparatus and method

Hydrogen production system, hydrogen storage and transportation system provided with the same, and hydrogen production method

Energy supply system and energy supply method

Systems and methods for producing hydrogen from a hydrocarbon and using the produced hydrogen in a hydrogenation reaction