Staged gradual oxidation
First Claim
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1. A system for oxidizing fuel comprising:
- a first reaction chamber with a first inlet and a first outlet, the first reaction chamber configured to receive a first gas comprising a first oxidizable fuel and air, the first reaction chamber configured to maintain a gradual oxidation process of the first fuel; and
a second reaction chamber with a second inlet and a second outlet, the second reaction chamber configured to receive through the second inlet (i) flue gas from the first outlet, the flue gas comprising heated product gas from oxidation of the first gas in the first reaction chamber and (ii) a second gas comprising a second oxidizable fuel, the second reaction chamber configured to maintain a gradual oxidation process of the second fuel;
wherein no source of air apart from the product gas is connected to a pathway between the first outlet and the second inlet;
wherein the first and second reaction chambers are configured to maintain an internal temperature in the respective reaction chambers below a flameout temperature of the respective fuel.
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Abstract
Described herein are embodiments of systems and methods for oxidizing gases. In some embodiments, a reaction chamber is configured to receive a fuel gas and maintain the gas at a temperature within the reaction chamber that is above an autoignition temperature of the gas. The reaction chamber may also be configured to maintain a reaction temperature within the reaction chamber below a flameout temperature. In some embodiments, heat and product gases from the oxidation process can be used, for example, to drive a turbine, reciprocating engine, and injected back into the reaction chamber.
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Citations
20 Claims
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1. A system for oxidizing fuel comprising:
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a first reaction chamber with a first inlet and a first outlet, the first reaction chamber configured to receive a first gas comprising a first oxidizable fuel and air, the first reaction chamber configured to maintain a gradual oxidation process of the first fuel; and a second reaction chamber with a second inlet and a second outlet, the second reaction chamber configured to receive through the second inlet (i) flue gas from the first outlet, the flue gas comprising heated product gas from oxidation of the first gas in the first reaction chamber and (ii) a second gas comprising a second oxidizable fuel, the second reaction chamber configured to maintain a gradual oxidation process of the second fuel; wherein no source of air apart from the product gas is connected to a pathway between the first outlet and the second inlet; wherein the first and second reaction chambers are configured to maintain an internal temperature in the respective reaction chambers below a flameout temperature of the respective fuel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A system for oxidizing fuel comprising:
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a first reaction chamber with a first inlet and a first outlet, the first reaction chamber configured to receive a first gas comprising a first oxidizable fuel and air, the first reaction chamber configured to maintain a gradual oxidation process of the first fuel; and a second reaction chamber with a second inlet and a second outlet, the second reaction chamber configured to receive only (i) flue gas consisting of heated product gas from oxidation of the first fuel in the first reaction chamber, into the second reaction chamber through the second inlet and (ii) a second gas consisting of a second oxidizable fuel, the second reaction chamber configured to maintain a gradual oxidation process of the second fuel; wherein the first and second reaction chambers are configured to maintain an internal temperature in the respective reaction chambers below a flameout temperature of the respective fuel. - View Dependent Claims (18, 19, 20)
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Specification