Methods and systems for producing a hydrocarbon are provided. The method can include cracking one or more C2-C10 hydrocarbons in the presence of a catalyst under conditions sufficient to produce an effluent containing ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst includes
Methods and systems for producing a hydrocarbon are provided. The method can include cracking one or more C2-C10 hydrocarbons in the presence of a catalyst under conditions sufficient to produce an effluent containing ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst includes a first catalytic component having an average pore size of less than 6.4 Å and a second catalytic component having an average pore size of 6.4 Å or more, separating the effluent to provide a recovered coked-catalyst and a cracked product; and regenerating the recovered coked-catalyst to produce heat and the catalyst.
대표청구항▼
1. A method for fluidized catalytic cracking, comprising: cracking a mixed C4 feed stream in the presence of a catalyst under conditions sufficient to produce an effluent comprising ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst comprises a first catalytic component having
1. A method for fluidized catalytic cracking, comprising: cracking a mixed C4 feed stream in the presence of a catalyst under conditions sufficient to produce an effluent comprising ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst comprises a first catalytic component having an average pore size of less than 6.4 Å and a second catalytic component having an average pore size of 6.4 Å or more;separating the effluent to provide a recovered coked-catalyst and a cracked product, wherein the coked-catalyst comprises between 1.5% and 5% coke by weight of the mixed C4 feed stream; andregenerating the recovered coked-catalyst to produce heat and the catalyst. 2. The method of claim 1, wherein the conditions comprise temperatures from about 590° C. to about 675° C. and pressures from about 68 kPa to about 690 kPa. 3. The method of claim 1, wherein the first catalytic component has an average pore size from about 5 Å to about 6 Å. 4. The method of claim 1, wherein the first catalytic component is ZSM-5. 5. The method of claim 1, wherein the second catalytic component has an average pore size from about 6.4 Å to about 50 Å. 6. The method of claim 1, wherein the second catalytic component is zeolite Y. 7. The method of claim 1, wherein the second catalytic component is an active matrix component. 8. The method of claim 1, wherein the hydrocarbon has a sulfur concentration of less than 200 ppmw. 9. The method of claim 1, wherein the hydrocarbon is substantially free of sulfur. 10. The method of claim 1, wherein the gasoline has a diene concentration of less than about 0.5 wt %. 11. A method for fluidized catalytic cracking, comprising: cracking a mixed C4 feed stream in the presence of a catalyst and a sulfur containing compound under conditions sufficient to produce an effluent comprising ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst comprises a first catalytic component having an average pore size from about 5 Å to about 6 Å and a second catalytic component having an average pore size of 6.4 Å or more, and wherein the gasoline has a diene content of less than about 3 wt %;separating the effluent to provide a recovered coked-catalyst and a cracked product, wherein the coked-catalyst comprises between 1.5% and 5% coke by weight of the mixed C4 feed stream; andregenerating the recovered coked-catalyst to produce heat and the catalyst. 12. The method of claim 11, wherein the first and second conditions comprise a temperature from about 590° C. to about 675° C. and a pressure from about 68 kPa to about 690 kPa. 13. The method of claim 11, wherein the first catalytic component is ZSM-5 and the second catalytic component is zeolite Y, USY, or an active matrix component. 14. The method of claim 11, wherein the first catalytic component is ZSM-5 and the second catalytic component is peptized pseudoboehmite alumina. 15. A method for fluidized catalytic cracking, comprising: cracking a mixed C4 feed stream in the presence of a catalyst under conditions sufficient to produce an effluent comprising ethylene, propylene, gasoline, and a coked-catalyst, wherein the catalyst comprises a first catalytic component having an average pore size of about 5.2 Å to about 5.8 Å and a second catalytic component having an average pore size of 6.4 Å or more, and wherein the hydrocarbon comprises one or more C4-C8 hydrocarbons;separating the effluent to provide a recovered coked-catalyst and a cracked product, wherein the coked-catalyst comprises between 1.5% and 5% coke by weight of the mixed C4 feed stream; andregenerating the recovered coked-catalyst to produce heat and the catalyst. 16. The method of claim 15, wherein the first catalytic component is ZSM-5 and the second catalytic component is zeolite Y. 17. The method of claim 15, wherein the gasoline has a diene concentration of less than about 0.5 wt %. 18. The method of claim 15, wherein the feed and the cracked product are substantially free of sulfur.
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