摘要:
A process for producing electrical energy in an internal reforming, high-temperature fuel cell. Steam reforming of a carbonaceous feed gas takes place in the presence of a steam-reforming catalyst in heat-conducting relationship with electrochemical reactions in the fuel cell. The steam reformed feed gas is electrochemically reacted in an anode compartment of the fuel cell. The process is improved by controlled addition of a gaseous, sulfur-containing compound to the carbonaceous feed gas in an amount sufficient to obtain a sulfur coverage on the steam reforming catalyst of between 0.1 to 0.9.
摘要:
Process and system for the production of synthesis gas from a hydrocarbon feed stock comprising the steps of endothermic and/or adiabatic catalytic steam reforming and autothermal steam reforming in series, wherein the steam reforming is carried out in one or more endothermic stages in series or in one or more adiabatic steam reforming stages in series with intermediate heating of feed stock gas leaving the adiabatic reforming stages and wherein carbon monoxide containing gas characterised by having a molar ratio of hydrogen to carbon of less than 4.5 is added prior to at least one of the endothermic or adiabatic steam reforming stages and/or prior to the autothermal steam reforming step.
摘要:
Process and apparatus for the preparation of synthesis gas by catalytic steam and/or CO2 reforming of a hydrocarbon feedstock comprising the following steps: (a) heating the reaction mixture of hydrocarbon feedstock and steam and/or CO2 in the flue gas containing waste heat section from the fired tubular reformer (b) adiabatic reforming of the reaction mixture outside the waste heat section by contact with a solid reforming catalyst (c) repeating steps (a) and (b) until the desired reaction mixture composition and temperature is reached (d) feeding the reaction mixture to the fired tubular reformer and further reforming the mixture to the desired composition and temperature, wherein the adiabatic reforming of the reaction mixture is conducted in the process gas piping system in the flue gas-containing waste heat section, the piping system having adiabatic zones outside the heating section and containing solid reforming catalysts comprising one or more catalyzed structured elements.
摘要:
Process for the generation of electrical energy in an internal reforming high temperature fuel cell, comprising steam and/or carbon dioxide reforming of a hydrocarbon feed gas in contact with a catalyst having activity in the steam reforming of the carbonaceous gas to fuel cell fuel gas and being arranged within the fuel cell in heat conducting relationship with electrochemical reactions proceeding in the cell; and electrochemically reacting the fuel gas in an anode compartment of the cell for the generation of electric energy, wherein the steam reforming activity of the catalyst has been reduced by including one or more salts of metals selected from Group IA, IB, IIA, IVA and VA of the Periodic Table in the catalyst.
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:
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:
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, aluminium, zinc, chromium and molybdenum.