A hydrocarbon feed stream is exposed to heat in an absence of oxygen (pyrolysis) to convert the hydrocarbon feed stream into a solids stream and a gas stream. The solids stream includes carbon. The gas stream includes hydrogen. The gas stream is separated into an exhaust gas stream and a first hydrogen stream. The first hydrogen stream includes at least a portion of the hydrogen from the gas stream. The carbon is separated from the solids stream to produce a carbon stream. Electrolysis is performed on a water stream to produce an oxygen stream and a second hydrogen stream. At least a portion of the oxygen of the oxygen stream and at least a portion of the carbon of the carbon stream are combined to generate power and a carbon dioxide stream. At least a portion of the generated power is used to perform the electrolysis on the water stream.

Low carbon hydrogen will play a crucial role in decarbonization of chemical complexes and manufacturing facilities. Depending on the application, different grades of low carbon hydrogen might be requiredfuel grade (90-99% H2 purity) or chemical grade (>99% H2 purity). The current invention describes a hydrogen production process based on autothermal reforming and CO2 capture to produce low carbon hydrogen with hydrogen rich offgas as part of the feedstock.

Processes and systems that utilize methane pyrolysis for carbon capture from a petrochemical stream that contains hydrogen and methane. The petrochemical stream can be the tail gas of a hydrocarbon cracking system, or any other petrochemical stream containing hydrogen and methane. The petrochemical stream can be separated into a hydrogen product stream and a methane product stream, before sending the methane product stream to a methane pyrolysis unit. The methane pyrolysis unit converts methane to solid carbon and hydrogen.

A method for enriching a synthesis gas in hydrogen is presented. The method includes adding H.sub.2O to the synthesis gas to form a synthesis gas stream that includes hydrogen, carbon monoxide, and steam. The synthesis gas stream has a steam to dry gas molar ratio, S/DG; and an oxygen to carbon molar ratio, O/C. The method includes introducing the synthesis gas stream into a water-gas shift reactor and reacting the synthesis gas stream in the water-gas shift reactor in the presence of a non-iron-based catalyst to produce a shifted synthesis gas. The method further includes controlling an outlet temperature of the synthesis gas stream to remain at or below a critical temperature or to drop to or below the critical temperature by adjusting the S/DG ratio to maintain the O/C ratio below a lower O/C limit or above an upper O/C limit.

A method for producing hydrogen product having a low carbon intensity is provided. The method includes the steps of: (a) converting a hydrocarbon feedstock to a hydrogen product using a hydrocarbon reforming process; (b) providing at least some of the required energy for the hydrogen production process from a biomass power plant; and (c) processing one or more flue gas streams from the biomass power plant in a carbon capture unit to reduce CO.sub.2e emissions. The hydrogen product has a carbon intensity preferably less than about 1.0 kg CO.sub.2e/kg H.sub.2, more preferably less than 0.45 kg CO.sub.2e/kg H.sub.2, and most preferably less than 0.0 kg CO.sub.2e/kg H.sub.2.

A method for producing hydrogen product having a low carbon intensity is provided. The method includes the steps of: (a) converting a hydrocarbon feedstock to a hydrogen product using a hydrocarbon reforming process; (b) providing at least some of the required energy for the hydrogen production process from a biomass power plant; and (c) processing one or more flue gas streams from the biomass power plant in a carbon capture unit to reduce CO.sub.2e emissions. The hydrogen product has a carbon intensity preferably less than about 1.0 kg CO.sub.2e/kg H.sub.2, more preferably less than 0.45 kg CO.sub.2e/kg H.sub.2, and most preferably less than 0.0 kg CO.sub.2e/kg H.sub.2.

A method for producing hydrogen product having a low carbon intensity is provided. The method includes the steps of: (a) converting a hydrocarbon feedstock to a hydrogen product using a hydrocarbon reforming process; (b) providing at least some of the required energy for the hydrogen production process from a biomass power plant; and (c) processing one or more flue gas streams from the biomass power plant in a carbon capture unit to reduce CO.sub.2e emissions. The hydrogen product has a carbon intensity preferably less than about 1.0 kg CO.sub.2e/kg H.sub.2, more preferably less than 0.45 kg CO.sub.2e/kg H.sub.2, and most preferably less than 0.0 kg CO.sub.2e/kg H.sub.2.

Method and apparatus for converting waste solid sustainable carbon material to chemical products is described herein. The methods add hydrocarbon derived from fossil sources to gas derived from gasifying waste solid sustainable carbon material to enhance hydrogen availability, and in some cases carbon availability, for production of the chemical products. Carbon dioxide made by the process is at least partially sequestered to yield a chemical manufacturing process with environmental burden substantially less than conventional processes. Use of the hydrocarbon boosts yield of final products.

The invention relates to a method and a system for upgrading a hydrocarbon-containing feed gas to a methanol product stream and a hydrogen product stream. As part of the method/system, a synthesis gas stream is compressed to a pressure being higher than the feed pressure of the hydrocarbon feed gas, prior to being fed to a methanol synthesis unit. A hydrogen product stream is provided by separating a hydro-gen rich stream, downstream the methanol synthesis unit.

A process for synthesising methanol comprising the steps of: passing a hydrocarbon feedstock to a synthesis gas generation unit to form a synthesis gas containing hydrogen, carbon monoxide, carbon dioxide and steam; cooling the synthesis gas in one or more stages of heat exchange and recovering a process condensate from the cooled synthesis gas to form a make-up gas having a stoichiometry value R in the range of 1.70 to 1.94; passing a feed gas comprising the make-up gas to a methanol synthesis unit comprising one or more methanol synthesis reactors containing a copper methanol synthesis catalyst, and; recovering a purge gas and a crude methanol product from the methanol synthesis unit, wherein a hydrogen-rich gas is recovered from the purge gas and combined with the make-up gas, and a stream of water or steam is added to the feed gas to the methanol synthesis unit.