Abstract:
A process for the production of carburized sponge iron, including charging iron ore into a direct reduction shaft, and/or discharging carburized sponge iron from the direct reduction shaft, whereby a seal gas is introduced into the direct reduction shaft; removing a top gas from the direct reduction shaft; recycling a proportion of the top gas and mixing with a make-up gas to form a reducing gas; and introducing the reducing gas into the direct reduction shaft in countercurrent flow to the iron ore in order to reduce the iron ore and produce carburized sponge iron. The seal gas consists essentially of carbon dioxide, and the make-up gas comprises greater than 80 vol % hydrogen gas. Also provided is a system for the production of carburized sponge iron, as well as a carburized sponge iron produced by the aforementioned process.
Abstract:
Systems and methods are provided for capturing CO2 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 CO2 from the combustion source exhaust and/or modifications in how the fuel cells can be operated.
Abstract:
In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with a Fischer-Tropsch synthesis process. The molten carbonate fuel cells can be integrated with a Fischer-Tropsch synthesis process in various manners, including providing synthesis gas for use in producing hydrocarbonaceous carbons. Additionally, integration of molten carbonate fuel cells with a Fischer-Tropsch synthesis process can facilitate further processing of vent streams or secondary product streams generated during the synthesis process.
Abstract:
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner. This can allow for increased power density while still maintaining a desired temperature differential within the fuel cell assembly.
Abstract:
In various aspects, systems and methods are provided for operating molten carbonate fuel cells in a refinery setting. The molten carbonate fuel cells can be used to provide hydrogen to various refinery processes, including providing hydrogen in place of using a carbon-based fuel for various combustion reactions. In a further aspect, CO2-containing streams generated by refinery processes can also be used as input streams to the molten carbonate fuel cells.
Abstract:
In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with processes for synthesis of nitrogen-containing compounds. The molten carbonate fuel cells can be integrated with a synthesis process in various manners, including providing hydrogen for use in producing ammonia. Additionally, integration of molten carbonate fuel cells with a methanol synthesis process can facilitate further processing of vent streams or secondary product streams generated during synthesis of nitrogen-containing compounds.
Abstract:
In various aspects, systems and methods are provided for integration of molten carbonate fuel cells with a Fischer-Tropsch synthesis process. The molten carbonate fuel cells can be integrated with a Fischer-Tropsch synthesis process in various manners, including providing synthesis gas for use in producing hydrocarbonaceous carbons. Additionally, integration of molten carbonate fuel cells with a Fischer-Tropsch synthesis process can facilitate further processing of vent streams or secondary product streams generated during the synthesis process.
Abstract:
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner. This can allow for increased power density while still maintaining a desired temperature differential within the fuel cell assembly.
Abstract:
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell, such as a fuel cell assembly, with increased production of syngas or hydrogen while also reducing or minimizing the amount of CO2 exiting the fuel cell in the cathode exhaust stream. This can allow for improved efficiency of syngas production while also generating electrical power.
Abstract:
In various aspects, systems and methods are provided for operating a molten carbonate fuel cell assembly at increased power density. This can be accomplished in part by performing an effective amount of an endothermic reaction within the fuel cell stack in an integrated manner. This can allow for increased power density while still maintaining a desired temperature differential within the fuel cell assembly.