摘要:
A carbon capture enabled system and method for generating electric power and/or fuel from methane containing sources using oxygen transport membranes by first converting the methane containing feed gas into a high pressure synthesis gas. Then, in one configuration the synthesis gas is combusted in oxy-combustion mode in oxygen transport membranes based boiler reactor operating at a pressure at least twice that of ambient pressure and the heat generated heats steam in thermally coupled steam generation tubes within the boiler reactor; the steam is expanded in steam turbine to generate power; and the carbon dioxide rich effluent leaving the boiler reactor is processed to isolate carbon. In another configuration the synthesis gas is further treated in a gas conditioning system configured for carbon capture in a pre-combustion mode using water gas shift reactors and acid gas removal units to produce hydrogen or hydrogen-rich fuel gas that fuels an integrated gas turbine and steam turbine system to generate power. The disclosed method and system can also be adapted to integrate with coal gasification systems to produce power from both coal and methane containing sources with greater than 90% carbon isolation.
摘要:
In various aspects, systems and methods are provided for operating molten carbonate fuel cells with processes for cement production. The systems and methods can provide process improvements including increased efficiency, reduction of carbon emissions per ton of product produced, and simplified capture of the carbon emissions as an integrated part of the system. The number of separate processes and the complexity of the overall production system can be reduced while providing flexibility in fuel feed stock and the various chemical, heat, and electrical outputs needed to power the processes.
摘要:
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell to reduce or minimize losses due to loss of heat energy. A molten carbonate fuel cell can be operated based on a desired ratio of heat generated by exothermic reactions in the fuel cell relative to heat consumed by endothermic reactions in the fuel cell and any optional integrated endothermic reaction stages.
摘要:
Systems and methods are provided for capturing CO 2 from a combustion source using molten carbonate fuel cells (MCFCs). At least a portion of the anode exhaust can be recycled for use as a fuel for the combustion source. Optionally, a second portion of the anode exhaust can be recycled for use as part of an anode input stream. This can allow for a reduction in the amount of fuel cell area required for separating CO 2 from the combustion source exhaust and/or modifications in how the fuel cells can be operated.
摘要:
The present disclosure relates to a power production system that is adapted to achieve high efficiency power production with complete carbon capture when using a solid or liquid hydrocarbon or carbonaceous fuel. More particularly, the solid or liquid fuel first is partially oxidized in a partial oxidation reactor. The resulting partially oxidized stream that comprises a fuel gas is quenched, filtered, cooled, and then directed to a combustor of a power production system as the combustion fuel. The partially oxidized stream is combined with a compressed recycle CO 2 stream and oxygen. The combustion stream is expanded across a turbine to produce power and passed through a recuperator heat exchanger. The expanded and cooled exhaust stream is scrubbed to provide the recycle CO 2 stream, which is compressed and passed through the recuperator heat exchanger and the POX heat exchanger in a manner useful to provide increased efficiency to the combined systems.
摘要:
The present invention relates to the use of low pressure N2 from an air separation unit (ASU, 100) for use as a sweep gas in a hydrogen transport membrane (HTM, 114, 126) to increase syngas H2 recovery and make a near-atmospheric pressure (less than or equal to about 25 psia) fuel for supplemental firing in the heat recovery steam generator (HRSG) duct burner (132).
摘要:
Die Erfindung betrifft eine Vorrichtung zum Einleiten von nachwachsenden Brennstoffen in den Bereich der Strahlungskesselwand (9) von Kohlevergasungsreaktoren, die aus einem Reaktionsraum mit in dem Reaktionsraum (2) angeordneten Brennern (6) und einem Abkühlräum (3) bestehen, und der Abkühlraum mit einer Strahlungskesselwand (9) zum Abkühlen und Abkühlen der flüssigen Schlacke ausgestattet ist, wobei erfindungsgemäß der ringförmige Teil des Abkühlraumes, in dem die Strahlungskesselwand angeordnet ist, mit Brennern (11) ausgerüstet wird, die durch die Strahlungskesselwand hindurch in den Abkühlraum hineinführen, durch die ein nachwachsender Brennstoff in den Abkühlraum einleitbar ist. Durch diese Vorrichtung kann nachwachsender Brennstoff in den Abkühlraum durch eine Strahlungskesselwand eingeleitet werden, der sich unterhalb des Reaktionsraumes befindet, so dass die Wärmeenthalpie des heißen Synthesegases auch in dem Abkühlraum zur Nachvergasung von nachwachsendem Brennstoff genutzt werden. Die Erfindung betrifft auch ein Verfahren zur Einleitung von nachwachsendem Brennstoff durch die Strahlungskesselwand des Abkühlraumes eines Kohlevergasungsreaktors und die Verwendung des durch das Verfahren hergestellten Synthesegases.
摘要:
A process for producing hydrogen comprising the steps of: (i) gasifying a fuel into a raw synthesis gas comprising CO, hydrogen, steam, sulfur and halide contaminants in the form of H2S, COS, and HX, wherein X is a halide; (ii) passing the raw synthesis gas through a water gas shift reactor (WGSR) into which CaO and steam are injected, the CaO reacting with the shifted gas to remove CO2, sulfur and halides in a solid-phase calcium-containing product comprising CaCO3, CaS and CaX2; (iii) separating the solid-phase calcium-containing product from an enriched gaseous hydrogen product; and (iv) regenerating the CaO by calcining the solid-phase calcium-containing product at a condition selected from the group consisting of: in the presence of steam, in the presence of CO2, in the presence of synthesis gas, in the presence of H2 and O2, under partial vacuum, and combinations thereof.