Abstract:
A hydrogen generation system is disclosed that includes a fuel reforming reactor generating a hydrogen-rich reformate gas at a temperature greater than 150 C, a pressure swing adsorption (PSA) hydrogen purification unit that separates the reformate gas into a relatively pure hydrogen stream and an off-gas stream, and a catalytic reactor down stream of the PSA unit that converts carbon monoxide (CO) and hydrogen (H2) contained in the relatively pure hydrogen stream into methane (CH4) and water vapor (H2O). The method of purification involves generating a hydrogen-rich reformate gas at a temperature greater than 150 C in a fuel reforming reactor, separating the reformate gas into a relatively pure hydrogen stream and an off-gas stream in a pressure swing adsorption (PSA) hydrogen purification unit, and converting carbon monoxide (CO) and hydrogen (H2) contained in the relatively pure hydrogen stream into methane (CH4) and water vapor (H2O) in a catalytic reactor down stream of the PSA unit. The hydrogen can be further purified by including a secondary purification stage downstream of the PSA unit and the catalytic reactor wherein the secondary purification stage has a water adsorbent material bed that adsorbs the water vapor H2O and a hydrogen absorbent material downstream of the water absorbent material that absorbs hydrogen gas preferentially, thus concentrating the non-hydrogen components, such as CH4, into an exhaust stream that exits the bed, wherein the absorbed hydrogen gas is then desorbed to create an exiting very pure hydrogen stream.
Abstract translation:公开了一种氢生成系统,其包括在大于150℃的温度下产生富氢重整气体的燃料重整反应器,将重整气分离成相对纯的氢气流的变压吸附(PSA)氢气净化单元,以及 以及PSA单元的下游催化反应器,其将包含在相对纯的氢气流中的一氧化碳(CO)和氢(H 2 N 2)转化成甲烷(CH 4) )和水蒸汽(H 2 O 2)。 纯化方法包括在燃料重整反应器中在大于150℃的温度下产生富氢重整气体,将重整气体分离成相对纯的氢气流和变压吸附(PSA)氢气中的废气流 净化单元,并将包含在相对纯的氢气流中的一氧化碳(CO)和氢(H 2 H 2)转化成甲烷(CH 3/4)和水蒸气(H 2 O)在PSA单元的下游催化反应器中。 可以通过在PSA单元和催化反应器的下游包括二级净化级来进一步纯化氢气,其中二次净化级具有吸附水蒸气H 2 O 2的水吸附剂床和氢 吸收材料下游的吸收材料,优先吸收氢气,从而将非氢组分(例如CH 4)浓缩到离开床的排气流中,其中吸收的氢气是 脱附以产生离开的非常纯的氢气流。
Abstract:
In a continuous process for recovery of values from a solid carbonaceous material, the carbonaceous material is pyrolyzed in the presence of a particulate source of heat to yield a particulate carbon containing residue of pyrolysis and volatilized hydrocarbons while simultaneously the volatilized hydrocarbons are hydrogenated. The particulate source of heat is formed by oxidizing carbon in the solid residue to heat the particles. Hydrogen for hydrogenation is obtained by reacting at least a portion of the hot particulate carbon containing residue of pyrolysis with steam prior to feeding the hot particulate residue to the pyrolysis reaction zone. Steam and/or carbon dioxide can be introduced into the pyrolysis reaction zone to react with carbon containing residue contained therein. The particulate source of heat can be introduced to the pyrolysis reaction zone over an overflow weir. The hydrogen and the particulate source of heat can be formed simultaneously in an oxidation-conversion zone. The volatilized hydrocarbons can be further hydrogenated in a vapor hydrogenation zone.
Abstract:
In a continuous process for recovery of values contained in a solid carbonaceous material, the carbonaceous material is comminuted and then subjected to flash pyrolysis in the presence of a particulate heat source to form a pyrolysis product stream containing a carbon containing solid residue and volatilized hydrocarbons. After the carbon containing solid residue is separated from the pyrolysis product stream, values are obtained by condensing volatilized hydrocarbons. The particulate source of heat is formed by oxidizing carbon in the solid residue. Apparatus useful for practicing this process are disclosed.
Abstract:
A hydrogen generation system is disclosed that includes a fuel reforming reactor generating a hydrogen-rich reformate gas at a temperature greater than 150 C, a pressure swing adsorption (PSA) hydrogen purification unit that separates the reformate gas into a relatively pure hydrogen stream and an off-gas stream, and a catalytic reactor down stream of the PSA unit that converts carbon monoxide (CO) and hydrogen (H2) contained in the relatively pure hydrogen stream into methane (CH4) and water vapor (H2O). The method of purification involves generating a hydrogen-rich reformate gas at a temperature greater than 150 C in a fuel reforming reactor, separating the reformate gas into a relatively pure hydrogen stream and an off-gas stream in a pressure swing adsorption (PSA) hydrogen purification unit, and converting carbon monoxide (CO) and hydrogen (H2) contained in the relatively pure hydrogen stream into methane (CH4) and water vapor (H2O) in a catalytic reactor down stream of the PSA unit. The hydrogen can be further purified by including a secondary purification stage downstream of the PSA unit and the catalytic reactor wherein the secondary purification stage has a water adsorbent material bed that adsorbs the water vapor H2O and a hydrogen absorbent material downstream of the water absorbent material that absorbs hydrogen gas preferentially, thus concentrating the non-hydrogen components, such as CH4, into an exhaust stream that exits the bed, wherein the absorbed hydrogen gas is then desorbed to create an exiting very pure hydrogen stream.
Abstract:
A hydrogen generation system is disclosed that has a vaporization section receiving and vaporizing fuel along with water and passing the vapor to a reformer catalyst section heated by a combustor section which generates reformate gas and is fueled by off-gas from a H2 purification unit along with a combustion air source. The off-gas outlet feeds the combustor section in the reformer assembly to heat the catalyst section and the vaporization section. An H2 storage unit connected to the H2 purification unit pure H2 outlet receives the pure H2. The storage unit has an outlet selectively connectable to the reformer assembly process inlet during startup without the need for a spark igniter. The startup process includes generating heat in the combustor section of the reformer assembly by passing H2 from the H2 storage unit through the vaporization section, the reformer catalyst section, the H2 purification unit and through the off-gas connection to the combustor section, then introducing water and fuel through the vaporization section and reformer catalyst section to generate reformate gas when the system is warmed, passing the reformate gas through the H2 purification unit to the off-gas connection to the combustor section, and establishing a back pressure on the reformer catalyst section and vaporizer section to decrease the hydrogen flow from the H2 storage unit until the system is fully sustainable without addition of H2 from the H2 storage unit.
Abstract:
In a continuous process for recovery of values from a solid carbonaceous material, the carbonaceous material is pyrolyzed in the presence of a particulate source of heat to yield a particulate carbon containing residue of pyrolysis and volatilized hydrocarbons while simultaneously the volatilized hydrocarbons are hydrogenated. The particulate source of heat is formed by oxidizing carbon in the solid residue to heat the particles. Hydrogen for hydrogenation is obtained by reacting at least a portion of the hot particulate carbon containing residue of pyrolysis with steam prior to feeding the hot particulate residue to the pyrolysis reaction zone. Steam and/or carbon dioxide can be introduced into the pyrolysis reaction zone to interact with carbon containing residue contained therein. The particulate source of heat can be introduced to the pyrolysis reaction zone over an overflow weir.
Abstract:
A hydrogen generation system is disclosed that includes an integrated steam reforming reactor. The reactor has an overall cylindrical shape, receives a reformate and separately receiving a combustion gas mixture. The reactor includes a plurality of reforming stages arranged in a stacked series of disc shaped stage configuration, wherein each reforming stage has a disc shaped combustion portion adjacent a disc shaped catalyst pack through which the reformate passes, wherein the reformate is directed axially between stages and radially within each stage; and the combustion mixture is directed radially between groups of stages and circumferentially within each stage.
Abstract:
A steam reformer may comprise fluid inlet and outlet connections and have a substantially cylindrical geometry divided into reforming segments and reforming compartments extending longitudinally within the reformer, each being in fluid communication. With the fluid inlets and outlets. Further, methods for generating hydrogen may comprise steam reformation and material adsorption in one operation followed by regeneration of adsorbers in another operation. Cathode off-gas from a fuel cell may be used to regenerate and sweep the adsorbers, and the operations may cycle among a plurality of adsorption enhanced reformers to provide a continuous flow of hydrogen.
Abstract:
A process and system for separating a fuel stream containing a low concentration of sulfur compounds from a primary fuel stream is disclosed. The process includes isolating a stage-one permeate stream and a stage-one retentate stream from the primary fuel stream, evaporating the stage-one permeate stream at a vacuum, and isolating a stage-two permeate stream and a stage-two retentate stream from the stage-one permeate stream. The stage-two retentate stream is a fuel stream containing low concentrations of sulfur compounds. The system includes a fuel supply, a stage-one separator for separating a fuel stream into a stage-one permeate stream and a stage-one retentate stream, a stage-two separator, a first supply line connecting a portion of the fuel supply to the stage-one separator, and a second supply line connecting the stage-one separator permeate stream to the stage-two separator. The stage-two separator isolates the stage-one separator permeate stream into a stage-two permeate stream and a stage-two retentate stream.
Abstract:
A hydrogen production apparatus for generating hydrogen comprises a first input for mixing a stream of liquid water with a stream of feed gas to produce a feed gas-water mixture stream and a heating mechanism for heating the feed gas-water mixture stream to a temperature sufficient to evaporate the water in the feed gas-water mixture stream to steam to produce a humidified feed-gas stream. A second input is provided for mixing the humidified feed-gas stream with a hydrocarbon fuel to produce a reformer reactant mixture of fuel, oxidant, and steam. A steam-methane reforming component reacts the hydrocarbon fuel and the steam in the reformer reactant mixture in a steam-methane reforming reaction to reform the hydrocarbon fuel in the reformer reactant mixture and produce a hydrogen enriched reformer product gas.