SYSTEM AND METHOD FOR PRODUCING SUBSTITTUE NATURAL GAS FROM COAL
First Claim
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1. A system for producing substitute natural gas and electricity, the system comprising:
- a hydrogasification reactor;
a hydrogen source coupled to the hydrogasification reactor;
a coal source coupled to the hydrogasification reactor;
an oxygen burner coupled to an outlet of the hydrogasification; and
an oxygen source coupled to the oxygen burner,wherein hydrogen from the hydrogen source and coal from the coal source react within the hydrogasification reactor to produce a gas stream, including methane, and a solid stream, and wherein at least a portion of the solid stream is combusted with oxygen from the oxygen source in the oxygen burner.
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Abstract
The present invention provides a system and method for producing substitute natural gas and electricity, while mitigating production of any greenhouse gasses. The system includes a hydrogasification reactor, to form a gas stream including natural gas and a char stream, and an oxygen burner to combust the char material to form carbon oxides. The system also includes an algae farm to convert the carbon oxides to hydrocarbon material and oxygen.
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Citations
22 Claims
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1. A system for producing substitute natural gas and electricity, the system comprising:
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a hydrogasification reactor; a hydrogen source coupled to the hydrogasification reactor; a coal source coupled to the hydrogasification reactor; an oxygen burner coupled to an outlet of the hydrogasification; and an oxygen source coupled to the oxygen burner, wherein hydrogen from the hydrogen source and coal from the coal source react within the hydrogasification reactor to produce a gas stream, including methane, and a solid stream, and wherein at least a portion of the solid stream is combusted with oxygen from the oxygen source in the oxygen burner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for producing substitute natural gas and electricity, the system comprising:
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a hydrogasification reactor; an electrolysis reactor; a hydrogen source coupled to the hydrogasification reactor; a coal source coupled to the hydrogasification reactor; an oxygen burner coupled to an outlet of the hydrogasification; an oxygen source coupled to the oxygen burner; and an algae farm coupled to the oxygen burner. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method of producing substitute natural gas and electricity, the method comprising the steps of:
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providing a hydrogasification reactor; providing coal to the hydrogasification reactor; providing hydrogen in the presence of the coal within the hydrogasification reactor to produce methane and char; and combusting the char in an oxygen burner to produce carbon oxides. - View Dependent Claims (20)
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21. A method of producing substitute natural gas and electricity, the method comprising the steps of:
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i. providing a hydrogasification reactor; ii. providing coal to the hydrogasification reactor; iii. providing hydrogen in the presence of coal within the hydrogasification reactor to produce methane and char; iv. combusting the char in a partial oxidation reactor with a water shift process to produce hydrogen and carbon oxides; v. separating the hydrogen and carbon oxides; vi. producing substitute natural gas; and vii. using an algae farm to convert the carbon oxides to hydrocarbon material and oxygen.
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22. A method of producing syngas, the method comprising the steps of:
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providing a partial oxidation with water shift reactor; reacting carbon material with steam and oxygen in the partial oxidation with water shift reactor to form carbon oxides and hydrogen; and using an algae farm to convert carbon oxides formed using the partial oxidation with shift reactor to hydrocarbon material and oxygen.
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Specification