Enhanced gasification system and method
Method and apparatus for converting waste solid sustainable carbon material to chemical products is described herein. The methods add hydrocarbon derived from fossil sources to gas derived from gasifying waste solid sustainable carbon material to enhance hydrogen availability, and in some cases carbon availability, for production of the chemical products. Carbon dioxide made by the process is at least partially sequestered to yield a chemical manufacturing process with environmental burden substantially less than conventional processes. Use of the hydrocarbon boosts yield of final products.
1. A process for making organic chemical products from solid sustainable carbon materials, the process comprising:
providing solid sustainable carbon material to a gasifier;
gasifying the solid sustainable carbon material to produce a first stream comprising CO, H 2 , CO 2 , and a mixture of organic compounds;
converting the organic compounds in the first stream, comprising partially oxidizing the organic compounds using a first converter, and hydrocarbon in a second stream, comprising partially oxidizing the hydrocarbon, using a second converter, the second stream comprising hydrocarbon derived from a fossil source, to CO, H 2 , and CO 2 , to form one or more gas streams comprising CO, H 2 , and CO 2 ;
converting at least a portion of CO in the one or more gas streams to CO 2 to increase H 2 in the one or more gas streams and to form one or more converted streams;
separating CO 2 from the one or more converted streams to form a conversion feed;
sequestering at least a portion of the separated CO 2 in an underground sequestration facility; and
producing one or more organic chemical products from the conversion feed,
wherein a % of net atomic carbon input into the process from fossil-derived sources is between 15% and 50%, and
wherein the organic chemical products contain less than 10% carbon derived from a fossil source.
2. The process of claim 1 , further comprising using a portion of the CO 2 separated from the one or more converted streams in gasifying the solid sustainable carbon material.
3. The process of claim 1 , wherein the first stream has a first flow rate, the second stream has a second flow rate, and the second flow rate is at least about 20% of the first flow rate.
4. The process of claim 3 , wherein the second flow rate is selected to provide a finished product with greenhouse gas emission life-cycle assessment no more than zero.
5. The process of claim 1 , wherein at least one of the one or more converted streams has a volumetric ratio of H 2 to CO that is at least 2.0.
6. The process of claim 1 , wherein the one or more organic chemical products are free of fossil-derived carbon.
7. The process of claim 1 , wherein the converting the organic compounds in the first stream and the hydrocarbon in the second stream to CO, H 2 , and CO 2 is performed in the same converter.
8. The process of claim 7 , wherein a portion of the separated CO 2 is used to gasify the solid sustainable carbon material, to convert the organic compounds in the first stream, to convert the hydrocarbons in the second stream, or any combination thereof.
9. The process of claim 1 , wherein
the converting the organic compounds in the first stream forms a first gas stream of the one or more gas streams,
the converting the hydrocarbon in the second stream forms a second gas stream of the one or more gas streams,
the converting at least a portion of CO in the one or more gas streams to CO 2 comprises converting CO in the first gas stream to CO 2 to form a first converted stream of the one or more converted streams, and
the converting at least a portion of CO in the one or more gas streams to CO 2 comprises converting CO in the second gas stream to CO 2 to form a second converted stream of the one or more converted streams.
10. The process of claim 9 , wherein
the separating CO 2 from the one or more converted streams to form a conversion feed comprises separating CO 2 from the first converted stream to form a first conversion feed,
the separating CO 2 from the one or more converted streams to form a conversion feed comprises separating CO 2 from the second converted stream to form a second conversion feed, and
further comprising combining the first conversion feed and the second conversion feed to form the conversion feed.