Methods for gasification of carbonaceous materials
First Claim
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1. A method of gasification of carbonaceous materials in a gasifier to produce a product gas, said method comprising:
- adding one or more carbonaceous materials;
adding a molecular oxygen-containing gas;
adding a methane-containing gas; and
optionally adding water or steam into said gasifier;
wherein amount of total oxygen added to said gasifier in pounds per pound of total carbon added to said gasifier comprises greater than 2.0 and less than about 3.0;
wherein the gasifier produces ash comprising ash-carbon and wherein said ash comprises less than about 10% of ash-carbon;
wherein said product gas is produced comprising carbon monoxide, hydrogen, and tar;
wherein said product gas is treated at a temperature of about 1750°
F. to about 3500°
F. in the presence of molecular oxygen to produce a raw syngas comprising carbon monoxide, hydrogen, and syngas-carbon;
wherein said raw-syngas comprises less than about 0.5 pound syngas-carbon per 1000 SCF raw-syngas produced;
wherein said gasifier comprises non-catalytic gasification.
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Abstract
The present disclosure is generally directed to process of gasification of carbonaceous materials to produce synthesis gas or syngas. The present disclosure provides improved methods of gasification comprising: adding one or more carbonaceous materials, adding a molecular oxygen-containing gas, adding a methane-containing gas and optionally adding water or steam into said gasifier. This disclosure is also directed to process of production of one or more alcohols from said syngas via fermentation or digestion in the presence of at least one microorganism.
38 Citations
17 Claims
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1. A method of gasification of carbonaceous materials in a gasifier to produce a product gas, said method comprising:
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adding one or more carbonaceous materials; adding a molecular oxygen-containing gas; adding a methane-containing gas; and optionally adding water or steam into said gasifier; wherein amount of total oxygen added to said gasifier in pounds per pound of total carbon added to said gasifier comprises greater than 2.0 and less than about 3.0; wherein the gasifier produces ash comprising ash-carbon and wherein said ash comprises less than about 10% of ash-carbon; wherein said product gas is produced comprising carbon monoxide, hydrogen, and tar; wherein said product gas is treated at a temperature of about 1750°
F. to about 3500°
F. in the presence of molecular oxygen to produce a raw syngas comprising carbon monoxide, hydrogen, and syngas-carbon;wherein said raw-syngas comprises less than about 0.5 pound syngas-carbon per 1000 SCF raw-syngas produced; wherein said gasifier comprises non-catalytic gasification. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of gasification of carbonaceous materials comprising a gasifier comprising a first reaction zone and a second reaction zone, said method comprising:
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adding one or more carbonaceous materials into said first reaction zone of gasifier; adding a molecular oxygen containing gas, a methane-containing gas and optionally adding water or steam into one or both of said first reaction zone and second reaction zone of said gasifier; wherein amount of total oxygen added into said first reaction zone of said gasifier in pounds per pound of total carbon added to said gasifier comprises 2.0 to about 3.0; wherein optionally adding methane-containing gas in the first reaction zone of said gasifier; wherein said gasifier comprises non-catalytic gasification; producing raw syngas in said gasifier. - View Dependent Claims (12, 13, 14)
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15. A method of gasification of carbonaceous materials in a gasifier comprising a first reaction zone and a second reaction zone to produce a product gas, said method comprising:
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adding one or more carbonaceous materials into said first reaction zone of gasifier; adding a molecular oxygen containing gas, a methane-containing gas and optionally adding water or steam into one or both of said first reaction zone and second reaction zone of said gasifier; wherein amount of total oxygen added into said first reaction zone of said gasifier in pounds per pound of total carbon added to said gasifier comprises 2.0 to about 3.0; wherein optionally adding methane-containing gas in the first reaction zone of said gasifier; wherein said product gas is produced comprising carbon monoxide, hydrogen, and tar; wherein the gasifier produces ash comprising ash-carbon and wherein said ash comprises less than about 10% of ash-carbon; wherein said product gas is raw-syngas comprising less than about 0.5 pound syngas-carbon per 1000 SCF raw-syngas produced; wherein said gasifier comprises non-catalytic gasification. - View Dependent Claims (16, 17)
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Specification