Methods and Systems for Synthesizing Iron-Based Materials and Sequestering Carbon Dioxide
First Claim
1. A method of sequestering carbon dioxide, said method comprising:
- producing iron-based sorbents and a carbonate forming material from minerals comprising iron;
consuming a first source of carbon dioxide to produce carbonated minerals from the carbonate forming material;
reducing the iron-based sorbents with a carbonaceous fuel to generate a second source of carbon dioxide; and
regenerating said iron-based sorbents that have been reduced via oxidation with steam.
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Abstract
Methods and systems for sequestering carbon dioxide and generating hydrogen are disclosed. In some embodiments, the methods include the following: dissolving an iron based material that includes a carbonate-forming element into a solution including the carbonate-forming element and iron; increasing a pH of the solution to cause precipitation of iron oxide from the solution thereby generating a first source of Fe2O3; reacting the carbonate-forming element in the solution with a first source of carbon dioxide to produce a carbonate thereby sequestering the carbon dioxide; oxidizing the first source of Fe2O3 with a carbonaceous fuel thereby generating a second source of carbon dioxide and iron; and oxidizing the iron with steam thereby generating hydrogen and an iron oxide. Some embodiments include producing iron-based catalysts.
4 Citations
24 Claims
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1. A method of sequestering carbon dioxide, said method comprising:
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producing iron-based sorbents and a carbonate forming material from minerals comprising iron; consuming a first source of carbon dioxide to produce carbonated minerals from the carbonate forming material; reducing the iron-based sorbents with a carbonaceous fuel to generate a second source of carbon dioxide; and regenerating said iron-based sorbents that have been reduced via oxidation with steam. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of sequestering carbon dioxide and generating hydrogen, said method comprising:
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dissolving a material that includes a carbonate-forming element and iron with a chelating agent into a solution; increasing a pH of said solution to cause precipitation of a first source of iron oxide from said solution; reacting said carbonate-forming element with a first source of carbon dioxide; reducing said first source of iron oxide with a carbonaceous fuel thereby generating a second source of carbon dioxide and reduced iron; and oxidizing said reduced iron with steam thereby generating hydrogen and a second source of iron oxide. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for sequestering carbon dioxide, said system comprising:
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a mineral and waste carbonation module for producing iron-based sorbents and carbonate forming material from at least one of minerals and industrial wastes using pH swing processes and sequestering carbon dioxide using the carbonate forming material; and a chemical looping module, said chemical looping module configured to reduce said iron-based sorbents and generate carbon dioxide for consumption in the mineral and waste carbonation module and regenerating said iron-based sorbents that have been reduced via oxidation with steam. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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Specification