Abstract:
The invention relates to a device for splitting water into hydrogen and oxygen by thermolysis, that is, by decomposition at elevated temperature. This device comprises: —a reactor (1) having a heating system (2), a first reactor outlet (3), a second reactor outlet (4), at least one water inlet (5) and at least one oxygen filter (6); —at least one hydrogen filter (7); —an oxygen extraction pump (8), a hydrogen extraction pump (9), at least one water injection pump (10); —a hydrogen separation chamber (11) located outside the reactor (1) and containing the hydrogen filter(s) (7); —a heat exchanger (15) comprising an inlet (31) and an outlet (13) for a first circuit and an inlet (17) and an outlet (19) for a second circuit. The particularity of such a device is that it comprises two further heat exchangers (16, 28) each comprising an inlet (14, 27) and an outlet (20, 29) for a first circuit and an inlet (22, 36) and an outlet (23, 34) for a second circuit and in that: —the inlet (31) of the first circuit of a first heat exchanger (15) is connected to an external water inlet (12) via the water injection pump (10), the outlet (13) of the first circuit of the first heat exchanger (15) is connected to the inlet (14) of a first circuit of a second heat exchanger (16); —the inlet (17) of the second circuit of the first heat exchanger (15) is connected to an outlet (18) of the hydrogen separation chamber (11), which is connected to the filter(s) (7) and the outlet (19) of the second circuit of the first heat exchanger (15) is a hydrogen outlet of the device. The invention also pertains to a process for splitting water into hydrogen using the above device.
Abstract:
The present invention concerns a sorption-enhanced water-gas shift (SEWGS) process for the formation of a CO2 product stream and an H2 product stream, comprising (a) a reaction step, wherein a feed gas comprising COx, wherein x=1-2, and H2O is fed into a SEWGS reactor containing a catalyst and sorbent material capable of adsorbing CO2, thereby forming the H2 product stream and a sorbent material loaded with CO2; (b) a rinse step, wherein steam is fed to the SEWGS reactor, thereby establishing a pressure in the range of 5-50 bar; (c) a pre-blowdown step, wherein the pressure in the SEWGS reactor is reduced to establish a blowdown pressure in the range of 0.5-1.5 times the partial pressure of CO and CO2 in the feed gas of step (a); (d) a blowdown step, wherein the pressure in the SEWGS reactor is reduced to the regeneration pressure in the range of 1-5 bar, thereby releasing at least part of the CO2 from the loaded sorbent material, thereby forming the CO2 product stream; and (e) a purge step, wherein steam is fed to the SEWGS reactor, thereby releasing further CO2 molecules from the SEWGS reactor, wherein the off gas released from the reactor during step (c) is collected separately from the CO2 product stream released from the reactor during step (d). The separate collection of the off gas of pre-blowdown step (c) affords a highly efficient process with excellent CO2 purity and carbon capture ratio.
Abstract:
A multi-stage shift reactor includes a vessel having an inner chamber configured to contain a first shift catalyst, the first shift catalyst configured to receive anode exhaust gas form a fuel cell and to output a first shifted gas, and an outer chamber annularly disposed about the inner chamber and configured to contain a second shift catalyst, the second shift catalyst configured to receive the first shifted gas and output a second shifted gas. The shift reactor further includes a water injection port downstream from the inner chamber and packing between the water injection port and the outer chamber, the packing configured to prevent liquid water from passing therethrough.
Abstract:
A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system is disclosed that carries out an air heated pre-reforming process, a primary reforming process, a secondary reforming process.
Abstract:
In aspects of the disclosure, a fuel cartridge wherein the fuel is in a powdered form is admixed with inert materials such as alumina or other ceramics to improve thermal conductivity. Said cartridge having fuel zones, heating zones, and controllers to selectively heat fuel zones and thereby generate hydrogen via decomposition of fuel is disclosed.
Abstract:
Systems and methods are provided for capturing CO2 from a combustion source using molten carbonate fuel cells (MCFCs). At least a portion of the anode exhaust can be recycled for use as part of anode input stream. This can allow for a reduction in the amount of fuel cell area required for separating CO2 from the combustion source exhaust and/or modifications in how the fuel cells can be operated.
Abstract:
The present invention relates to an integrated process for producing hydrocarbons, wherein feedstock originating from renewable sources is subjected to catalytic hydroprocessing followed by separation of an aqueous component, a heavy component, and a light component, separating carbon dioxide and hydrogen sulfide from said light component to obtain a recycle stream, followed by dividing the recycle stream to a first recycle stream and a second recycle stream, directing the first recycle stream to the hydroprocessing system, and the second recycle stream to a hydrogen plant, where the light component is converted to hydrogen, and directing the hydrogen to the hydroprocessing system.
Abstract:
A method for synthesizing ammonia for agricultural fertilizers employs water (H2O) as the source of hydrogen (H2) in ammonia (NH3) synthesis, and gathers carbon monoxide (CO) as a limiting reagent for combining in a WGS (Water-Gas-Shift) reaction for producing hydrogen. The WGS reaction employs CO with the water to produce Carbon Dioxide (CO2) and H2, consuming undesirable CO from other industrial applications. A by-product of the process includes generating 1.5 mole of CO2 for each mole of ammonia synthesized. An intermediate step consumes 3 moles of hydrogen for each mole of Nitrogen (N2). The use of methane gas is avoided as the process employs CO and the WGS reaction as an exclusive source of H2 without introducing methane (CH4). A downstream synthesis of ammonia can be done through a fuel cell to produce electricity for the ammonia synthesis for further sustainability.
Abstract:
In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with a methanol synthesis process. The molten carbonate fuel cells can be integrated with a methanol synthesis process in various manners, including providing synthesis gas for use in producing methanol. Additionally, integration of molten carbonate fuel cells with a methanol synthesis process can facilitate further processing of vent streams or secondary product streams generated during methanol synthesis.
Abstract:
Systems and methods are provided for capturing CO2 from a combustion source using molten carbonate fuel cells (MCFCs). The fuel cells are operated to have a reduced anode fuel utilization. Optionally, at least a portion of the anode exhaust is recycled for use as a fuel for the combustion source. Optionally, a second portion of the anode exhaust is recycled for use as part of an anode input stream. This can allow for a reduction in the amount of fuel cell area required for separating CO2 from the combustion source exhaust and/or modifications in how the fuel cells are operated.