A flow reactor system for providing on-demand H.sub.2 evolution at pressure from a liquid organic hydrogen carrier and/or blends thereof includes a reactor that includes a reaction vessel having an inlet and outlet. The inlet is configured to introduce reactants into the reaction vessel, and the outlet is configured to release reaction products. The reaction vessel is configured to hold therein a catalyst system capable of catalyzing the evolution of molecular hydrogen from a liquid organic hydrogen carrier. Advantageously, the reaction vessel is configured to operate at pressures greater than or equal to 50 psig (e.g., from about 50 psig to about 10500 psig. The flow reactor system also includes a source of preheated liquid organic hydrogen carrier in fluid communication with the reactor and a purification system in fluid communication with the outlet that provides purified molecular hydrogen gas for on-demand applications.

The invention includes a gas processing system for transforming a hydrocarbon-containing inflow gas into outflow gas products, where the system includes a gas delivery subsystem, a plasma reaction chamber, and a microwave subsystem, with the gas delivery subsystem in fluid communication with the plasma reaction chamber, so that the gas delivery subsystem directs the hydrocarbon-containing inflow gas into the plasma reaction chamber, and the microwave subsystem directs microwave energy into the plasma reaction chamber to energize the hydrocarbon-containing inflow gas, thereby forming a plasma in the plasma reaction chamber, which plasma effects the transformation of a hydrocarbon in the hydrocarbon-containing inflow gas into the outflow gas products, which comprise acetylene and hydrogen. The invention also includes methods for the use of the gas processing system.

The invention includes a gas processing system for transforming a hydrocarbon-containing inflow gas into outflow gas products, where the system includes a gas delivery subsystem, a plasma reaction chamber, and a microwave subsystem, with the gas delivery subsystem in fluid communication with the plasma reaction chamber, so that the gas delivery subsystem directs the hydrocarbon-containing inflow gas into the plasma reaction chamber, and the microwave subsystem directs microwave energy into the plasma reaction chamber to energize the hydrocarbon-containing inflow gas, thereby forming a plasma in the plasma reaction chamber, which plasma effects the transformation of a hydrocarbon in the hydrocarbon-containing inflow gas into the outflow gas products, which comprise acetylene and hydrogen. The invention also includes methods for the use of the gas processing system.

An absorption column including at least one external heat exchange circuit for cooling or heating the absorption liquid, including one or more serially connected heat exchangers, wherein the junction of the pipeline for withdrawal of the absorption liquid from the column is disposed above the junction of the pipeline into the first heat exchanger in the flow direction, wherein the pipeline also includes a dumped bed.

An absorption column including at least one external heat exchange circuit for cooling or heating the absorption liquid, including one or more serially connected heat exchangers, wherein the junction of the pipeline for withdrawal of the absorption liquid from the column is disposed above the junction of the pipeline into the first heat exchanger in the flow direction, wherein the pipeline also includes a dumped bed.

A process for producing low or no carbon intensity hydrogen. In one embodiment, the process includes the step of pretreating a hydrocarbon gas stream. The pretreated hydrocarbon gas stream is fed into a reformer. The pretreated hydrocarbon gas steam is heated in the reformer to produce a synthesis gas stream and a flue gas stream. The flue gas stream is fed to a waste heat recovery section. Waste heat is recovered to increase the thermal efficiency of the process. The synthesis gas stream is fed to a shift gas reactor. Carbon monoxide from the synthesis gas stream in the shift gas reactor is converted to produce hydrogen and carbon dioxide. The carbon dioxide is separated from the synthesis gas stream and the hydrogen is separated. In another embodiment, the carbon dioxide is captured following the hydrogen separation. In another embodiment, the carbon dioxide is captured from the flue gas.

A process for producing low or no carbon intensity hydrogen. In one embodiment, the process includes the step of pretreating a hydrocarbon gas stream. The pretreated hydrocarbon gas stream is fed into a reformer. The pretreated hydrocarbon gas steam is heated in the reformer to produce a synthesis gas stream and a flue gas stream. The flue gas stream is fed to a waste heat recovery section. Waste heat is recovered to increase the thermal efficiency of the process. The synthesis gas stream is fed to a shift gas reactor. Carbon monoxide from the synthesis gas stream in the shift gas reactor is converted to produce hydrogen and carbon dioxide. The carbon dioxide is separated from the synthesis gas stream and the hydrogen is separated. In another embodiment, the carbon dioxide is captured following the hydrogen separation. In another embodiment, the carbon dioxide is captured from the flue gas.

A method for decreasing the SFFC of a steam reforming plant, including establishing a base operating mode. Then modifying the base operating mode by introducing the shift gas stream into a solvent based, non-cryogenic separator prior to introduction into the pressure swing adsorption and introducing the compressed hydrogen depleted off-gas stream in a membrane separation unit, wherein the membrane is configured to produce the hydrogen enriched permeate stream at a suitable pressure to allow the hydrogen enriched permeate stream to be combined with carbon dioxide lean shift gas stream, prior to introduction into the pressure swing adsorption unit without requiring additional compression. Thereby establishing a modified operating mode. Wherein said pressure swing adsorption unit has a modified overall hydrogen recovery. Wherein said modified operating mode has a modified hydrogen production, a modified hydrogen production unit firing duty, a modified SCO2e, and a modified SFFC.

A method for decreasing the SFFC of a steam reforming plant, including establishing a base operating mode. Then modifying the base operating mode by introducing the shift gas stream into a solvent based, non-cryogenic separator prior to introduction into the pressure swing adsorption and introducing the compressed hydrogen depleted off-gas stream in a membrane separation unit, wherein the membrane is configured to produce the hydrogen enriched permeate stream at a suitable pressure to allow the hydrogen enriched permeate stream to be combined with carbon dioxide lean shift gas stream, prior to introduction into the pressure swing adsorption unit without requiring additional compression. Thereby establishing a modified operating mode. Wherein said pressure swing adsorption unit has a modified overall hydrogen recovery. Wherein said modified operating mode has a modified hydrogen production, a modified hydrogen production unit firing duty, a modified SCO2e, and a modified SFFC.

A method for decreasing the SFFC of a steam reforming plant, including establishing a base operating mode. Then modifying the base operating mode by introducing the shift gas stream into a solvent based, non-cryogenic separator prior to introduction into the pressure swing adsorption and introducing the compressed hydrogen depleted off-gas stream in a membrane separation unit, wherein the membrane is configured to produce the hydrogen enriched permeate stream at a suitable pressure to allow the hydrogen enriched permeate stream to be combined with carbon dioxide lean shift gas stream, prior to introduction into the pressure swing adsorption unit without requiring additional compression. Thereby establishing a modified operating mode. Wherein said pressure swing adsorption unit has a modified overall hydrogen recovery. Wherein said modified operating mode has a modified hydrogen production, a modified hydrogen production unit firing duty, a modified SCO2e, and a modified SFFC.