Air-independent internal oxidation
AssigneeZere Energy and Biofuels, Inc.
InventorGeorge Linton Touchton
Life of this patent
Estimating the term…
Abstract
A chemical-looping combustion system is provided in which an oxygen carrier, for example a metallic oxide or peroxide, is used for fuel combustion and produces carbon dioxide and water as by-products. The system delivers steam and CO2 at for direct utilization by steam cycle power generation equipment and heat exchangers. After fuel combustion, the oxygen-poor carrier is regenerated by exposure to air in a second, sequestered reactor. Choice of oxygen-carrier material and conditions allows for the fuel oxidizer reactor to run at temperatures greater than the running temperature of the regenerator reactor.
Claims10
A power-generation method comprising:
- reacting within a first reaction-temperature range a carbonaceous or hydrogen fuel with a material in an oxygen-rich form in a first reactor to convert said material to an oxygen-poor form and to produce a first off gas containing carbon dioxide and water;
- transferring said material in its oxygen-poor form to a second reactor;
- introducing air into said second reactor for reaction within a second reaction-temperature range with said material in its oxygen-poor form to convert said material to its oxygen-rich form and to produce a second off gas, the highest level of said second reaction-temperature range being less than the highest level of said first reaction-temperature range;
- and
- transferring said material in its oxygen-rich form from said second reactor to said first reactor.
A power-generation method comprising:
- reacting within a reaction-temperature range a carbonaceous or hydrogen fuel with a material in an oxygen-rich form in a first reactor to convert said material to an oxygen-poor form and to produce a off as containing carbon dioxide and water;
- transferring said material in its oxygen-poor form to a second reactor;
- introducing air into said second reactor for reaction within a second reaction-temperature range with said material in its oxygen-poor form to convert said material to its oxygen-rich form and to produce a second off gas, the highest level of said second reaction-temperature range being less than the highest level of said first reaction-temperature range;
- transferring said material in its oxygen-rich form from said second reactor to said first reactor;
- and
- a third reactor arranged to receive the solid product from said first reactor and contact it with the fuel to reduce at least a portion of the barium carbonate and barium hydroxide to barium oxide and to partially oxidize and gasify at least part of the fuel to a carbonaceous fuel and hydrogen, with said fuel and hydrogen then transferred to said first reactor.
A power-generation method comprising:
- reacting within a reaction-temperature range a carbonaceous or hydrogen fuel with a material in an oxygen-rich form in a first reactor to convert said material to an oxygen-poor form and to produce a off gas containing carbon dioxide and water;
- transferring said material in its oxygen-poor form to a second reactor;
- introducing air into said second reactor for reaction within a second reaction-temperature range with said material in its oxygen-poor form to convert said material to its oxygen-rich form and to produce a second off gas, the highest level of said second reaction-temperature range being less than the highest level of said first reaction-temperature range;
- transferring said material in its oxygen-rich form from said second reactor to said first reactor;
- and
- a third reactor arranged to receive the solid product from said first reactor and contact it with the fuel to reduce at least a portion of the barium carbonate and barium hydroxide to barium oxide and to partially oxidize and gasify at least part of the fuel to a carbonaceous fuel and hydrogen, with said fuel and hydrogen then transferred to said first reactor.
Dependencies are inferred from the claim text.