Rendering natural gas as an environmentally carbon dioxide neutral fuel and a regenerative carbon source
First Claim
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1. A method for rendering natural gas an essentially environmentally carbon dioxide-neutral fuel and regenerative carbon source, which comprises:
- subjecting natural gas to reaction conditions sufficient to produce carbon dioxide;
capturing and purifying the produced carbon dioxide; and
combining the purified carbon dioxide with water and a suitable hydrocarbon source having the formulation of CnH(2n+2) in a molar ratio of 3;
(3n−
1);
1 as 3CnH(2n+2)+(3n−
1)H2O+CO2 to conduct a bi-reforming reaction by;
conducting steam reforming of the hydrocarbon with water to form carbon monoxide and hydrogen;
conducting dry reforming of the hydrocarbon with carbon dioxide to form carbon monoxide and hydrogen;
combining effluents including carbon monoxide and hydrogen from the steam and dry reforming reactions without separation of components of the reforming reactions or their effluents to produce a mixture of hydrogen and carbon monoxide having a molar ratio of hydrogen to carbon monoxide that is about 2;
1 to 2.1;
1; and
converting the molar mixture of hydrogen and carbon monoxide under conditions sufficient to exclusively form methanol, as follows;
(3n+1)CO+(6n+2)H2→
(3n+1)CH3OH,so that the carbon dioxide generated using or producing natural gas is not introduced into the atmosphere, thus rendering the natural gas as an essentially environmentally carbon dioxide-neutral fuel.
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Abstract
The invention provides a method for rendering natural gas as an environmentally essentially carbon dioxide-neutral fuel. Carbon dioxide produced from natural gas combustion or from natural gas wells is captured, purified, combined with natural gas or methane or with hydrogen, and reacted under reaction conditions sufficient to form methanol and/or dimethyl ether, which can be used as fuel or feedstock for derived synthetic hydrocarbons and products.
9 Citations
23 Claims
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1. A method for rendering natural gas an essentially environmentally carbon dioxide-neutral fuel and regenerative carbon source, which comprises:
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subjecting natural gas to reaction conditions sufficient to produce carbon dioxide; capturing and purifying the produced carbon dioxide; and combining the purified carbon dioxide with water and a suitable hydrocarbon source having the formulation of CnH(2n+2) in a molar ratio of 3;
(3n−
1);
1 as 3CnH(2n+2)+(3n−
1)H2O+CO2 to conduct a bi-reforming reaction by;conducting steam reforming of the hydrocarbon with water to form carbon monoxide and hydrogen; conducting dry reforming of the hydrocarbon with carbon dioxide to form carbon monoxide and hydrogen; combining effluents including carbon monoxide and hydrogen from the steam and dry reforming reactions without separation of components of the reforming reactions or their effluents to produce a mixture of hydrogen and carbon monoxide having a molar ratio of hydrogen to carbon monoxide that is about 2;
1 to 2.1;
1; andconverting the molar mixture of hydrogen and carbon monoxide under conditions sufficient to exclusively form methanol, as follows;
(3n+1)CO+(6n+2)H2→
(3n+1)CH3OH,so that the carbon dioxide generated using or producing natural gas is not introduced into the atmosphere, thus rendering the natural gas as an essentially environmentally carbon dioxide-neutral fuel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification