Process for production of hydrogen with transport from chemical looping using mixture of partial oxidation oxygen carriers and combustion oxygen carriers
AssigneeUnited States Department of Energy
InventorsRanjani Siriwardane, Jarrett Riley
Life of this patent
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Abstract
The invention provides a process for producing hydrogen having the steps of reacting a fuel with a combination of two oxygen carriers to produce gaseous products and reduced oxygen carriers; reacting a portion of the reduced oxygen carriers with steam to generate hydrogen and partially oxidized oxygen carriers; and reacting the partially oxidized oxygen carriers and remaining reduced oxygen carriers with air to generate heat and regenerate the two oxygen carriers in their original oxidation state, wherein the heat and regenerated oxygen carriers are reused.
Claims19
A method for producing hydrogen from a fuel comprising:
- reacting the fuel with a fully oxidized first oxygen carrier and a fully oxidized second carrier in a fuel reactor to produce gaseous products and a reduced first oxygen carrier and a reduced second oxygen carrier, wherein the fully oxidized first oxygen carrier is CaFe2O4 and the fully oxidized second oxygen carrier is CuFeMnAlO4;
- removing a first portion of each of the reduced first oxygen carrier and the reduced second oxygen carrier from the fuel reactor and dividing said first portion into a second portion and a third portion;
- reacting the second portion with air in an air reactor to generate heat and a regenerated fully oxidized first oxygen carrier and a regenerated fully oxidized second oxygen carrier;
- transporting the regenerated fully oxidized first oxygen carrier and the regenerated fully oxidized second oxygen carrier and at least a portion of the heat from the air reactor to the fuel reactor;
- and
- reacting the third portion with steam in a steam reactor to generate hydrogen and a partially oxidized reduced first oxygen carrier and a partially oxidized second oxygen carrier.
A method for producing hydrogen from a fuel comprising:
- reacting the fuel with a fully oxidized first oxygen carrier and a fully oxidized second carrier in a fuel reactor to produce gaseous products and a reduced first oxygen carrier and a reduced second oxygen carrier;
- removing a first portion of each of the reduced first oxygen carrier and the reduced second oxygen carrier from the fuel reactor and dividing said first portion into a second portion and a third portion;
- reacting the second portion with air in an air reactor to generate heat and a regenerated fully oxidized first oxygen carrier and a regenerated fully oxidized second oxygen carrier;
- transporting the regenerated fully oxidized first oxygen carrier and the regenerated fully oxidized second oxygen carrier and at least a portion of the heat from the air reactor to the fuel reactor, wherein the fuel reactor and air reactor comprise a chemical looping system and the steam reactor is decoupled from said chemical looping system;
- and
- reacting the third portion with steam in a steam reactor to generate hydrogen and a partially oxidized reduced first oxygen carrier and a partially oxidized second oxygen carrier.
Dependencies are inferred from the claim text.