摘要:
A process (10) for the preparation and conversion of synthesis gas includes reforming a feed gas (34) comprising methane in a reforming stage (18) to produce synthesis gas (46) which includes hydrogen and carbon monoxide. Some of the hydrogen and carbon monoxide is converted to a Fischer-Tropsch product (48) in a Fischer-Tropsch hydrocarbon synthesis stage (24). A tail gas (52), including unreacted hydrogen and carbon monoxide, methane and carbon dioxide, is separated from the Fischer-Tropsch product (48). In a tail gas treatment stage (28,30), the tail gas (52) is treated by reforming the methane in the tail gas (52) with steam (66) and removing carbon dioxide to produce a hydrogen rich gas (56). The tail gas treatment stage (28,30) may be either a combined tail gas treatment stage (28,30) or a composite tail gas treatment stage. The carbon dioxide from the tail gas treatment stage (28,30) is fed to the reforming stage (18).
摘要:
A process for the preparation of a synthesis gas containing hydrogen and carbon monoxide by a combination of catalytic partial oxidation and further an autothermal reforming process, comprising (a) providing separate streams of predetermined proportions of a hydrocarbon feedstock, an oxygen source and of process steam, (b) injecting said separate streams into a catalytic partial oxidation reaction zone to react, and to form a prereformed product stream, (c) introducing the prereformed product and a predetermined proportion of a second oxygen source into a further partial oxidation process step forming a further partially oxidised process stream by flame reactions, (d) reacting the further partially oxidised process stream in the reaction zone constituting a steam reforming process step to form a synthesis gas product stream, and (e) withdrawing the synthesis gas product stream from the further partial oxidation process step and the steam reforming process step, the two steps constituting the autothermal reforming process.
摘要:
The invention relates to a process for the production of synthesis gas by the use of autothermal reforming in which tail gas from downstream Fischer-Tropsh synthesis is hydrogenated and then added to the autothermal reforming stage.
摘要:
A process (10) for the preparation and conversion of synthesis gas includes reforming a feed gas (34) comprising methane in a reforming stage (18) to produce synthesis gas (46) which includes hydrogen and carbon monoxide. Some of the hydrogen and carbon monoxide is converted to a Fischer-Tropsch product (48) in a Fischer-Tropsch hydrocarbon synthesis stage (24). A tail gas (52), including unreacted hydrogen and carbon monoxide, methane and carbon dioxide, is separated from the Fischer-Tropsch product (48). In a tail gas treatment stage (28,30), the tail gas (52) is treated by reforming the methane in the tail gas (52) with steam (66) and removing carbon dioxide to produce a hydrogen rich gas (56). The tail gas treatment stage (28,30) may be either a combined tail gas treatment stage (28,30) or a composite tail gas treatment stage. The carbon dioxide from the tail gas treatment stage (28,30) is fed to the reforming stage (18).
摘要:
Process for selectively reforming ethanol to a hydrogen-rich product in the presence of at least one catalyst comprising a catalytically active material supported on a carrier, the process comprising the following steps in which the at least one catalyst is active: transferring a stream of ethanol and steam and a hydrogen-comprising stream, the molar ratio of ethanol to hydrogen being 0.2-1, to a dehydration/hydrogenation reactor for dehydrating ethanol to ethylene and for hydrogenating ethylene to produce an ethane-containing stream, adiabatically pre-reforming the ethane-comprising stream to a stream comprising methane, steam reforming the stream comprising methane to produce a mixture comprising hydrogen and carbon monoxide, converting the mixture comprising hydrogen and carbon monoxide from the steam reforming step under water gas shift conditions to produce a hydrogen-rich product stream.
摘要:
A process for generating electrical power in a gas turbine cycle including an air compression stage, first and second gas combustion stages, and a series of first and second gas expansion stages. Mechanical power is provided for the generation of electrical power in a rotating power generator. The first combustion stage is operated on hydrogen-depleted fuel gas at high pressure using air from the air compression stage. The hydrogen-depleted fuel gas is obtained by endothermic catalytic steam reforming of a hydrocarbon feed gas. Heat for the endothermic steam reforming is supplied by indirect heat exchange with heat from hot exhaust gas from the second expansion stage. The second combustion stage is operated at lower pressure than the first combustion stage on exhaust gas from the first expansion stage and the hydrogen-enriched gas separated form the hydrogen depleted gas. The hydrogen-enriched gas is separated from the hydrogen-depleted fuel gas during the catalytic steam reforming of the feed gas.
摘要:
A process for a reduction in the amount of sulphur compounds, hydrogen cyanide, formic acid and formic acid derivatives in synthesis gas comprising these compounds, the process comprising contacting the synthesis gas with a sulphur absorbent comprising material and thereafter with a catalyst comprising one or more metals selected from the group consisting of silver, gold, copper, palladium, platinum and their mixtures and supported on a carrier comprising at least one of the oxides of scandium, yttrium, lanthanum, cerium, titanium, zirconium, aluminum, zinc, chromium and molybdenum.
摘要:
Process for the preparation of synthesis gas from an essentially dry hydrocarbon feedstock (1) comprising olefins, hydrogen and carbon monoxide, the process comprising the steps: (a) selectively hydrogenating the olefins in the hydrocarbon feedstock at a temperature between 60 to 190° C. (2) to obtain a hydrogenated hydrocarbon feedstock comprising hydrogen, carbon monoxide and saturated hydrocarbons (3; (b) adding steam (4) to the hydrogenated hydrocarbon feedstock; (c) performing a water gas shift reaction in the presence of steam on the hydrogenated hydrocarbon feedstock (6) to obtain a shifted, hydrogenated hydrocarbon mixture; (d) converting the shifted, hydrogenated hydrocarbon mixture (8) to obtain a synthesis gas.
摘要:
The invention relates to a process for the production of synthesis gas by the use of autothermal reforming in which tail gas from downstream Fischer-Tropsh synthesis is hydrogenated and then added to the autothermal reforming stage.
摘要:
Process for selectively reforming ethanol to a hydrogen-rich product in the presence of at least one catalyst comprising a catalytically active material supported on a carrier, the process comprising the following steps in which the at least one catalyst is active: transferring a stream of ethanol and steam and a hydrogen-comprising stream, the molar ratio of ethanol to hydrogen being 0.2-1, to a dehydration/hydrogenation reactor for dehydrating ethanol to ethylene and for hydrogenating ethylene to produce an ethane-containing stream, adiabatically pre-reforming the ethane-comprising stream to a stream comprising methane, steam reforming the stream comprising methane to produce a mixture comprising hydrogen and carbon monoxide, converting the mixture comprising hydrogen and carbon monoxide from the steam reforming step under water gas shift conditions to produce a hydrogen-rich product stream.