Back to results
US 12,759,874 B2Granted
Systems and methods for producing hydrogen gas from methane and carbon dioxide
AssigneeSaudi Arabian Oil Company
InventorsAhmet Atilgan, Hasmukh A. Patel
Life of this patent
Estimating the term…
Abstract
Hydrogen may be produced by a method that includes a first reaction where methane is reacted with carbon dioxide to produce at least carbon monoxide and hydrogen, a second reaction where a metal in a reduced state is reacted with water to form at least hydrogen and a metal in an oxidized state, and a third reaction where carbon monoxide is reacted with the metal in an oxidized state to form at least carbon dioxide and the metal in a reduced state.
Claims20
A method for producing hydrogen gas, the method comprising:
- in a first reaction, reacting methane with carbon dioxide to form at least carbon monoxide and hydrogen;
- passing the carbon monoxide produced in the first reaction and the hydrogen produced in the first reaction to a first separation unit;
- separating the carbon monoxide from the hydrogen in the first separation unit;
- in a second reaction, reacting at least water with a metal in a reduced state to form at least hydrogen and a metal in an oxidized state;
- and
- in a third reaction, reacting the metal in an oxidized state produced in the second reaction with at least a portion of the carbon monoxide produced in the first reaction that is separated from the hydrogen in the separation unit to form carbon dioxide and to reduce the metal in the oxidized state.
3 more elements
A method for producing hydrogen, the method comprising:
- passing methane and carbon dioxide to a first reactor, such that the methane and carbon dioxide react to form at least carbon monoxide and hydrogen;
- passing water to a second reactor comprising a metal in a reduced state, such that the water reacts with the metal in a reduced state to form at least hydrogen and a metal in an oxidized state in the second reactor;
- passing at least a portion of the carbon monoxide produced in the first reactor to the second reactor while the metal in an oxidized state is positioned in the second reactor, such that the metal in an oxidized state reacts with carbon monoxide to form at least the metal in a reduced state and carbon dioxide;
- and
- wherein passing the carbon monoxide produced in the first reactor to the second reactor comprises:
- passing at least some of the carbon monoxide produced in the first reactor and the hydrogen produced in the first reactor to a first separation unit;
- separating the carbon monoxide from the hydrogen in the first separation unit;
- passing the carbon monoxide separated in the first separation unit to a carbon monoxide storage vessel;
- and
- passing the carbon monoxide from the carbon monoxide storage vessel to the second reactor.
7 more elements
A method for producing hydrogen, the method comprising:
- passing methane and carbon dioxide to a first reactor, such that the methane and carbon dioxide react to form at least carbon monoxide and hydrogen;
- passing water to a second reactor comprising a metal in a reduced state, such that the water reacts with the metal in a reduced state to form at least hydrogen and a metal in an oxidized state in the second reactor;
- passing at least a portion of the carbon monoxide produced in the first reactor to the second reactor while the metal in an oxidized state is positioned in the second reactor, such that the metal in an oxidized state reacts with carbon monoxide to form at least the metal in a reduced state and carbon dioxide;
- passing water to a third reactor comprising a metal in a reduced state, such that the water reacts with the metal in a reduced state to form at least hydrogen and a metal in an oxidized state in the third reactor;
- passing at least a portion of the carbon monoxide produced in the first reactor to the third reactor while the metal in an oxidized state is positioned in the third reactor, such that the metal in an oxidized state reacts with carbon monoxide to form at least the metal in a reduced state and carbon dioxide;
- wherein the second reactor is oxidizing the metal in the reduced state while the third reactor is reducing the metal in an oxidized state;
- and
- the second reactor is reducing the metal in an oxidized state while the third reactor is oxidizing the metal in a reduced state.
5 more elements
Dependencies are inferred from the claim text.