Oxycombustion with CO2 capture in reverse flow reactors
AssigneeExxonMobil Technology and Engineering Company
InventorsEverett J. O'Neal, Brian M. Weiss, Anastasios I. Skoulidas
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for using oxycombustion to provide heat within a reverse flow reactor environment. The oxygen for the oxycombustion can be provided by oxygen stored in an oxygen storage component in the reactor. By using an oxygen storage component to provide the oxygen for combustion during the regeneration step, heat can be added to a reverse flow reactor while reducing or minimizing addition of diluents and while avoiding the need for an air separation unit. As a result, a regeneration flue gas can be formed that is substantially composed of CO2 and/or H2O without requiring the additional cost of creating a substantially pure oxygen-containing gas flow.
Claims18
A method for performing an endothermic reaction, comprising:
- exposing an oxygen-containing stream to an oxygen storage component in a combustion zone within a reactor to form an oxidized oxygen storage component, the oxygen storage component comprising:
- a metal oxide system comprising manganese oxide, iron oxide, copper oxide, nickel oxide, or a combination thereof, and
- a binder comprising magnesium oxide, calcium oxide, yttrium oxide or a combination thereof;
- reacting a fuel mixture comprising a fuel stream and a working fluid with the oxidized oxygen storage component under combustion conditions to form a flue gas and to heat one or more surfaces in a reaction zone to a regenerated surface temperature of 600° C. or more, the fuel mixture comprising 20 vol % or more CO2;
- recycling at least a portion of the flue gas to form at least a portion of the working fluid;
- and
- exposing an endothermic reagent stream to the one or more surfaces in the reaction zone at the regenerated surface temperature to form an endothermic product stream, a direction of flow for the endothermic reagent stream within the reaction zone being reversed relative to a direction of flow for the fuel mixture.
Dependencies are inferred from the claim text.