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- Nachgewiesen in: USPTO Patent Grants
- Sprachen: English
- Patent Number: 11448,109
- Publication Date: September 20, 2022
- Appl. No: 17/572569
- Application Filed: January 10, 2022
- Assignees: INGEVITY SOUTH CAROLINA, LLC (North Charleston, SC, US)
- Claim: 1. An evaporative emission control canister system, including one or more canisters comprising: an upstream adsorbent volume having an incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane; and at least one downstream subsequent adsorbent volume having an incremental adsorption capacity at 25° C. of less than 16 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, and at least one of (i) a butane working capacity (BWC) of from about 1.6 to about 3 g/dL, or (ii)) a butane working capacity (BWC) of from about 1.6 to about 3 g/dL and a g-total BWC of from 0.8-6 grams, wherein the upstream adsorbent volume and the at least one downstream adsorbent volume are located within a single canister, or in separate canisters that are connected to permit sequential contact by fuel vapor.
- Claim: 2. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume has an effective butane working capacity (BWC) of 1.6-3 g/dL and a g-total BWC of 1.6-6 g.
- Claim: 3. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume comprises a first nominal adsorbent volume; an air gap, void or a spacer; and a second nominal adsorbent volume.
- Claim: 4. The evaporative emission control canister system of claim 1 , wherein the evaporative emission control canister system further includes a hybrid combustion engine.
- Claim: 5. The evaporative emission control canister system of claim 1 , wherein the evaporative emission control canister system has a two-day diurnal breathing loss (DBL) of no more than 20 mg at (a) no more than 210 liters of purge applied after a 40 g/hr butane loading step or (b) no more than 100 bed volumes (BV) of purge applied after a 40 g/hr butane loading step as determined by the 2012 California Bleed Emissions Test Procedure (BETP).
- Claim: 6. The evaporative emission control canister system of claim 1 , wherein the evaporative emission control canister system has a two-day diurnal breathing loss (DBL) of no more than 20 mg at between 75-210 L of purge applied after a 40 g/hr butane loading step as determined by the 2012 California Bleed Emissions Test Procedure (BETP).
- Claim: 7. The evaporative emission control canister system of claim 1 , wherein the evaporative emission control canister system has a two-day diurnal breathing loss (DBL) of no more than 20 mg at between 50-100 BV of purge applied after a 40 g/hr butane loading step as determined by the 2012 California Bleed Emissions Test Procedure (BETP).
- Claim: 8. The evaporative emission control canister system of claim 1 , wherein the evaporative emission control system further includes at least one heat input unit for heating one or more adsorbent volumes.
- Claim: 9. The evaporative emission control canister system of claim 1 , wherein the upstream adsorbent volume, the at least one downstream subsequent adsorbent volume or both includes an adsorbent selected from the group consisting of activated carbon, carbon charcoal, zeolites, clays, porous polymers, porous alumina, porous silica, molecular sieves, kaolin, titania, ceria, and combinations thereof.
- Claim: 10. The evaporative emission control canister system of claim 9 , wherein the adsorbent is selected from the group consisting of activated carbon, carbon charcoal, and combinations thereof.
- Claim: 11. The evaporative emission control canister system of claim 10 , wherein the activated carbon is derived from a material including a member selected from the group consisting of wood, wood dust, wood flour, cotton linters, peat, coal, coconut, lignite, carbohydrates, petroleum pitch, petroleum coke, coal tar pitch, fruit pits, fruit stones, nut shells, nut pits, sawdust, palm, vegetables, synthetic polymer, natural polymer, lignocellulosic material, and combinations thereof.
- Claim: 12. The evaporative emission control canister system of claim 1 , wherein a form of adsorbent in the upstream adsorbent volume, the at least one downstream subsequent adsorbent volume or both includes a member selected from the group consisting of granular, pellet, spherical, honeycomb, monolith, pelletized cylindrical, particulate media of uniform shape, particulate media of non-uniform shape, structured media of extruded form, structured media of wound form, structured media of folded form, structured media of pleated form, structured media of corrugated form, structured media of poured form, structured media of bonded form, non-wovens, wovens, sheet, paper, foam, hollow-cylinder, star, twisted spiral, asterisk, configured ribbons, and combinations thereof.
- Claim: 13. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume includes a volumetric diluent between nominal volumes.
- Claim: 14. The evaporative emission control canister system of claim 13 , wherein the volumetric diluent includes a member selected from the group consisting of inert spacer particles, trapped air spaces, foams, fibers, screens, and combinations.
- Claim: 15. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume has an effective incremental adsorption capacity at 25° C. of 24 or less grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane.
- Claim: 16. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume has an effective incremental adsorption capacity at 25° C. of 16 or less grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane.
- Claim: 17. The evaporative emission control canister system of claim 8 , wherein the heat input unit include at least one of an internal resistive element, external resistive element, or heat input unit associated with the adsorbent.
- Claim: 18. The evaporative emission control canister system of claim 1 , wherein the at least one downstream subsequent adsorbent volume has an effective butane working capacity (BWC) of 1.6-3 g/dL and a g-total BWC of 2-6 g.
- Claim: 19. The evaporative emission control canister system of claim 1 , wherein the system includes a plurality of downstream subsequent adsorbent volumes including at least one downstream subsequent adsorbent volume having an effective incremental adsorption capacity, which includes air gaps, voids, and other volumes between nominal volumes of adsorbents, at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, an effective butane working capacity (BWC) of 1.6-3 g/dL, and optionally a g-total BWC of from 0.8-6 grams.
- Claim: 20. An evaporative emission control canister system, including one or more canisters comprising: an upstream adsorbent volume having an effective incremental adsorption capacity at 25° C. of greater than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane; and at least one downstream subsequent adsorbent volume having an effective incremental adsorption capacity at 25° C. of less than 35 grams n-butane/L between vapor concentration of 5 vol % and 50 vol % n-butane, wherein the effective volume includes air gaps, voids, and other volumes between nominal volumes of the at least one subsequent adsorbent volume, and at least one of (i) an effective butane working capacity (BWC) of 1.6-3 g/dL or (ii) an effective butane working capacity (BWC) of 1.6-3 g/dL, and a g-total BWC of from 0.8-6 grams, wherein the upstream adsorbent volume and the at least one downstream adsorbent volumes are located within a single canister, or in separate canisters that are connected to permit sequential contact by fuel vapor.
- Claim: 21. The evaporative emission control canister system of claim 20 , wherein the evaporative emission control canister system further includes a hybrid combustion engine.
- Claim: 22. The evaporative emission control canister system of claim 20 , wherein the evaporative emission control canister system has a two-day diurnal breathing loss (DBL) of no more than 20 mg at (a) no more than 210 liters of purge applied after a 40 g/hr butane loading step or (b) no more than 100 bed volumes (BV) of purge applied after a 40 g/hr butane loading step as determined by the 2012 California Bleed Emissions Test Procedure (BETP).
- Claim: 23. The evaporative emission control canister system of claim 20 , wherein the evaporative emission control canister system has a two-day diurnal breathing loss (DBL) of no more than 20 mg at between 75-210 L of purge applied after a 40 g/hr butane loading step as determined by the 2012 California Bleed Emissions Test Procedure (BETP).
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- Primary Examiner: Lawrence, Jr., Frank M
- Attorney, Agent or Firm: Zerhusen, Esq., Bryan D. ; Herrel, Esq., Nicholas R. ; Cantor Colburn LLP
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