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. Biomass is used to provide energy to dry solid sustainable carbon material to form dry sustainable carbon material to gasify. 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 chemical products from solid sustainable carbon materials, the process comprising:
converting a first solid sustainable carbon material to energy and an exhaust comprising CO 2 , wherein the energy from converting the first solid sustainable carbon material is used to dry a second solid sustainable carbon material to produce a dried solid sustainable carbon material;
sequestering at least a portion of CO 2 from the exhaust in a sequestration facility;
gasifying the dried solid sustainable carbon material to produce a first stream comprising CO, H 2 , CO 2 , and a mixture of organic compounds;
providing a second stream comprising hydrocarbon derived from a fossil source;
converting the organic compounds in the first stream and the hydrocarbon in the second stream into 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 the sequestration facility;
and
producing one or more chemical products from the conversion feed.
2 . The process of claim 1 , wherein converting the organic compounds in the first stream comprises partially oxidizing the organic compounds and converting the hydrocarbon in the second stream comprises partially oxidizing the hydrocarbon.
3 . The process of claim 1 , further comprising using a portion of the CO 2 of the exhaust in gasifying the dried sustainable carbon material.
4 . 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.
5 . The process of claim 4 , wherein the second flow rate is selected to provide a finished product with GHG LCA no more than zero.
6 . 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.
7 . The process of claim 1 , wherein the chemical products are free of fossil-derived carbon.
8 . The process of claim 7 , further comprising using a portion of the separated CO 2 , a portion of the CO 2 of the exhaust, or both in gasifying the dried solid sustainable carbon material, converting the organic compounds in the first stream, converting 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, converting the hydrocarbon in the second stream forms a second gas stream of the one or more gas streams, converting CO in the first gas stream to CO 2 forms a first converted stream of the one or more converted streams, and converting CO in the second gas stream to CO 2 forms a second converted stream of the one or more converted streams.
10 . The process of claim 9 , wherein separating CO 2 from the first converted stream forms a first conversion feed, separating CO 2 from the second converted stream forms a second conversion feed, and the first and second conversion feeds are combined.
11 . A process for making chemical products containing carbon from solid sustainable carbon materials, the process comprising:
converting a first solid sustainable carbon material to energy and an exhaust comprising CO 2 , wherein the energy from converting the first solid sustainable carbon material is used to dry a second solid sustainable carbon material to produce a dried solid sustainable carbon material;
sequestering at least a portion of CO 2 from the exhaust in a sequestration facility;
gasifying the dried solid sustainable carbon material to produce a first stream comprising CO, H 2 , CO 2 , and a mixture of organic compounds;
providing a second stream comprising hydrocarbon derived from a fossil source;
converting the organic compounds in the first stream and the hydrocarbon in the second stream into 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;
controlling an amount of fossil-derived carbon in the conversion feed;
sequestering at least a portion of the separated CO 2 in the sequestration facility;
and
producing one or more chemical products from the conversion feed.
12 . The process of claim 11 , wherein less than 25% of the carbon in the chemical products is fossil-derived.
13 . The process of claim 11 , further comprising using a portion of the CO 2 of the exhaust in gasifying the dried sustainable carbon material.
14 . The process of claim 11 , further comprising using a portion of the separated CO 2 , a portion of the CO 2 of the exhaust, or both in gasifying the dried solid sustainable carbon material, converting the organic compounds in the first stream, converting the hydrocarbons in the second stream, or any combination thereof.
15 . The process of claim 11 , wherein:
the one or more gas streams comprising CO, H 2 , and CO 2 comprises a first gas stream comprising CO, H 2 , and CO 2 obtained by converting the organic compounds in the first stream and a second gas stream comprising CO, H 2 , and CO 2 obtained by converting the hydrocarbon in the second stream;
converting at least a portion of CO in the one or more gas streams to CO 2 comprises converting at least a portion of CO in the first gas stream, the second gas stream, or both to CO 2 .
16 . The process of claim 15 , further comprising using a portion of the separated CO 2 , a portion of the CO 2 of the exhaust, or both in gasifying the dried solid sustainable carbon material, converting the organic compounds in the first stream, converting the hydrocarbons in the second stream, or any combination thereof.
17 . The process of claim 15 , wherein the chemical products have fossil-derived carbon up to about 50% of the carbon in the chemical products.
18 . The process of claim 15 , wherein the first stream has a first flow rate, the second stream has a second flow rate, and the second flow rate is selected to provide a finished product with GHG LCA no more than zero.
19 . The process of claim 15 , wherein converting at least a portion of CO in the first gas stream, the second gas stream, or both to CO 2 to increase H 2 in the first gas stream, the second gas stream, or both to form one or more converted streams 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 converting CO in the second gas stream to CO 2 to form a second converted stream of the one or more converted streams.
20 . The process of claim 19 , wherein separating CO 2 from the one or more converted streams to form a conversion feed comprises combining the first converted stream with the second converted stream.