Recycling carbon in blast furnace gas emissions
AssigneeSchlumberger Technology Corporation
InventorsOmar Navarro Morales, Z. Frank Zheng
Life of this patent
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Abstract
A carbon recycling control system may generate electricity using blast furnace gas emissions from a blast furnace, the blast furnace gas emissions including carbon dioxide. A carbon recycling control system may concentrate the carbon dioxide from the blast furnace gas emissions using a post combustion carbon capture process, the post combustion carbon capture process resulting in a carbon dioxide rich stream. A carbon recycling control system may generate carbon monoxide at an electrolyzer using the carbon dioxide rich stream, the carbon monoxide combined with hydrogen gas to form a syngas. A carbon recycling control system may inject the syngas into the blast furnace.
Claims20
A carbon recycling system for a blast furnace, the carbon recycling system forming a closed loop for carbon, the carbon recycling system comprising:
- an electricity generation system positioned to receive an entirety of blast furnace gas emissions from the blast furnace, wherein the electricity generation system is configured to generate combustion exhaust and produce electricity;
- a carbon dioxide concentration system positioned to receive the combustion exhaust and/or the blast furnace gas emissions, wherein the carbon dioxide concentration system is configured to output a carbon dioxide rich stream;
- a carbon monoxide generation system positioned to receive the carbon dioxide rich stream, wherein the carbon monoxide generation system is configured to output carbon monoxide;
- a syngas generation system comprising at least the carbon monoxide generation system, wherein the syngas generation system is configured to form syngas using the carbon monoxide;
- and
- a gas line for injection of the syngas into the blast furnace as a reducing agent, wherein an entirety of the syngas formed via the syngas generation system is injected into the blast furnace via the gas line,
- wherein the carbon recycling system is operable with a carbon recycling efficiency of at least 50%.
Dependencies are inferred from the claim text.