Abstract: Methods and systems for producing hydrogen are provided. In one embodiment, a method of producing hydrogen comprises reacting a feed source with steam to produce a gas mixture containing hydrogen and a residue gas; introducing the gas mixture into a purification unit; adsorbing the residue gas; and discharging at least a portion of the hydrogen. The method further comprises depressurizing the purification unit; discharging at least a portion of the residue gas during the depressurization; recycling the residue gas to the feed source; and discharging the residue gas remaining in the purification unit. In another embodiment, the method includes discharging a portion of the residue gas during the depressurization such that the residue gas discharged has a higher hydrocarbon content than the secondary product remaining in the purification unit.

Abstract: The invention concerns a method for converting hydrocarbon-containing gases into hydrocarbon-containing liquids wherein the Fischer-Tropsch process is implemented, said Fischer-Tropsch process producing hydrocarbon-containing liquids and a residue gas comprising at least hydrogen, carbon monoxide, carbon dioxide and hydrocarbons having a carbon number not more than 6, wherein the residue gas is subjected to a separation method producing: at least one gas stream comprising for the major part hydrogen; at least one stream comprising for the major part methane; at least one gas stream comprising for the major part inerts (carbon dioxide, nitrogen, argon) and hydrocarbons having a carbon number not less than 2.

Abstract: The invention concerns a method for converting hydrocarbon-containing gases into hydrocarbon-containing liquids which consists in: a) producing a syngas from the hydrocarbon-containing gases, b) treating the syngas using Fischer-Tropsch process to obtain hydrocarbon-containing liquids and a residue gas comprising at least hydrogen, carbon monoxide, carbon dioxide and hydrocarbons, c) treating the residue gas using a separation process producing at least one gas stream comprising hydrogen and carbon monoxide, d) subjecting said gas stream to a reaction of carbon monoxide vapor oxidizing reaction so as to convert CO into hydrogen and CO2, and mixing the effluent gas derived from the carbon monoxide vapor oxidizing reaction with the syngas derived form step a).

Abstract: This disclosure discusses problems associated with using natural gas to produce a variety of synthetic hydrocarbon products by production processes that require syngas feedstocks with varying H2/CO and (H2?CO2)/(CO+CO2) ratios. A number of gas separation membranes are used to vary the composition of the feed streams to different hydrocarbon synthesis units so that different synthetic hydrocarbon products can be produced. The process supplies syngas to an integrated hydrocarbon processing system comprising a number of hydrocarbon synthesis units. Gas (usually a portion of a raw syngas stream) is routed through the separation membrane units, multiple H2-rich and H2-lean streams are produced. These H2-rich and H2-lean streams can then be combined in a controlled fashion to produce feed streams of the desired compositions for the various hydrocarbon synthesis units. A variety of liquid synthetic hydrocarbon products can be produced from a given syngas source as required by market demands.

Abstract: Methods and systems for producing hydrogen are provided. In one embodiment, a method of producing hydrogen comprises reacting a feed source with steam to produce a gas mixture containing hydrogen and a residue gas; introducing the gas mixture into a purification unit; adsorping the residue gas; and discharging at least a portion of the hydrogen. The method further comprises depressurizing the purification unit; discharging at least a portion of the residue gas during the depressurization; recycling the residue gas to the feed source; and discharging the residue gas remaining in the purification unit. In another embodiment, the method includes discharging a portion of the residue gas during the depressurization such that the residue gas discharged has a higher hydrocarbon content than the secondary product remaining in the purification unit.

Abstract: This disclosure discusses problems associated with using natural gas to produce a variety of synthetic hydrocarbon products by production processes that require syngas feedstocks with varying H2/CO and (H2?CO2)/(CO+CO2) ratios. A number of gas separation membranes are used to vary the composition of the feed streams to different hydrocarbon synthesis units so that different synthetic hydrocarbon products can be produced. The process supplies syngas to an integrated hydrocarbon processing system comprising a number of hydrocarbon synthesis units. Gas (usually a portion of a raw syngas stream) is routed through the separation membrane units, multiple H2-rich and H2-lean streams are produced. These H2-rich and H2-lean streams can then be combined in a controlled fashion to produce feed streams of the desired compositions for the various hydrocarbon synthesis units. A variety of liquid synthetic hydrocarbon products can be produced from a given syngas source as required by market demands.

Abstract: Methods for converting hydrocarbon gases into hydrocarbon liquids through Fischer-Tropsch methods. In addition to liquid hydrocarbons, a waste gas containing hydrogen, carbon dioxide, and hydrocarbons with less than 6 carbon atoms, is produced. The waste gas is separated and several gas streams are produced. One such gas stream contains methane, and has a recovery rate, in terms of hydrogen and carbon monoxide, of at least 60%. Another gas stream has a recovery rate, in terms of carbon dioxide, of at least 40%. A supplementary gas stream, which contains hydrocarbons with at least 2 carbon atoms, is also created.

Abstract: Methods for integrating a syngas production unit with a gas to liquid (GTL) system, and a power generation unit to efficiently use hydrogen and carbon monoxide contained in the syngas produced from methane-containing hydrocarbon feedstock (e.g. natural gas). Membrane separation and other separation technologies are used to separate components of an off-gas stream from the GTL system and associated down stream hydroprocessing unit, and recycle the stream components advantageously to the process, or use them in utility generation units. A hydrogen-recovery membrane unit and a CO-recovery unit are utilized also to produce a syngas feed stock to the GTL system with an H2/CO ratio favorable for the production on synthetic liquid hydrocarbons. In one embodiment, pure hydrogen is also produced in a PSA unit, whose feed stream enriched in H2 by a membrane to provide hydrogen needed for liquid product hydroprocessing systems.