CPC C01B 3/48 (2013.01) [C01B 3/501 (2013.01); C01B 3/508 (2013.01); C10G 3/42 (2013.01); C10G 3/52 (2013.01); C01B 2203/0216 (2013.01); C01B 2203/0283 (2013.01); C01B 2203/043 (2013.01); C01B 2203/0405 (2013.01); C01B 2203/065 (2013.01); C01B 2203/1235 (2013.01); C01B 2203/86 (2013.01); C10G 2300/1011 (2013.01); C10G 2300/4043 (2013.01); C10G 2300/42 (2013.01); C10G 2400/04 (2013.01); C10G 2400/08 (2013.01)] | 10 Claims |
1. A method of producing a hydrogen-enriched product and recovering CO2 in an integrated hydrogen production process and bio-renewable conversion process, the integrated process comprising:
processing a feed stream comprising hydrocarbons or a carbonaceous feedstock in a hydrogen production process unit to produce a synthesis gas mixture comprising hydrogen, carbon dioxide, water, and at least one of methane, carbon monoxide, nitrogen, and argon;
separating an effluent stream from the hydrogen production process unit in a first pressure swing adsorption (PSA) system that produces that produces at least two product streams into at least a first high-pressure hydrogen stream enriched in hydrogen and a hydrogen depleted tail gas stream
compressing the hydrogen depleted tail gas stream in a compressor to form a compressed tail gas stream;
separating the compressed tail gas stream in a CO2 recovery system producing a CO2-enriched product stream and second gas stream comprising hydrogen;
hydrogenating, deoxygenating, isomerizing, and selectively hydrocracking a bio-renewable feedstock in a reaction zone in the presence of hydrogen at reaction conditions by contacting the bio-renewable feedstock with a multifunctional catalyst or a set of catalysts having hydrogenation, deoxygenation, isomerization, and selective hydrocracking functions to provide a reaction effluent comprising paraffinic hydrocarbons, hydrogen, CO2, water, and at least one of methane, ethane, propane, C4+ hydrocarbons, and carbon monoxide;
separating the reaction effluent in a separator into at least a hydrocarbon stream comprising the paraffinic hydrocarbons and an overhead stream comprising hydrogen, CO2, optionally water, and at least one of methane, ethane, propane, C4+ hydrocarbons, and carbon monoxide;
separating the hydrocarbon stream in a fractionation zone to generate a hydrocarbon product stream, wherein the hydrocarbon product stream comprises at least one of a diesel stream comprising hydrocarbons having boiling points in a diesel boiling point range, an aviation fuel stream having hydrocarbons having boiling points in an aviation fuel boiling point range, and a naphtha stream having hydrocarbons in a naphtha boiling point range;
recovering the hydrocarbon product stream;
separating the overhead stream from the separator into at least a hydrogen stream comprising hydrogen; and
introducing at least a portion of a purge gas stream comprising hydrogen from the hydrogen stream from the bio-renewable conversion process into a process unit in the hydrogen production process.
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