Methods for gasification of carbonaceous materials
AssigneeIneos USA LLC
InventorsBhagya Chandra Sutradhar, Ching-Whan Ko
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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 carbon dioxide gas and optionally adding water 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.
Claims15
A method of gasification of carbonaceous materials in a gasifier to produce a product gas comprising carbon monoxide, hydrogen, and tar;
- comprising:
- adding one or more carbonaceous materials, adding a molecular oxygen containing gas, adding carbon dioxide gas and optionally adding water 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 about 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 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.
A method of gasification of carbonaceous materials in a gasifier to produce syngas;
- said gasifier comprising a first reaction zone and a second reaction zone;
- said method comprising:
- adding one or more carbonaceous materials into said first reaction zone of gasifier;
- adding a molecular oxygen containing gas, carbon dioxide 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 to said gasifier in pounds per pound of total carbon added to said gasifier comprises greater than about 2.0 and less than about 3.0;
- 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.
Dependencies are inferred from the claim text.