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1. WO2020112812 - FONCTIONNEMENT DE PILES À COMBUSTIBLE À CARBONATE FONDU PRÉSENTANT UNE UTILISATION DU CO2 AMÉLIORÉE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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CLAIMS

What is claimed is:

1. A method for producing electricity in a molten carbonate fuel cell comprising an electrolyte, the method comprising: operating a molten carbonate fuel cell comprising an anode and a cathode at a transference of 0.95 or less and an average current density of 60 mA/cm2 or more, to generate an anode exhaust comprising H2, CO, and CO2, and a cathode exhaust comprising 2.0 vol% or less CO2, 1.0 vol% or more O2, and 1.0 vol% or more H2O.

2. The method of claim 1, wherein the electrolyte is more acidic than an electrolyte composed of


3. A method for producing electricity in a molten carbonate fuel cell comprising an electrolyte, the method comprising: operating a molten carbonate fuel cell comprising an anode, a cathode, and an electrolyte that is more acidic than an electrolyte composed of at a transference of 0.97 or less (or 0.95 or less) and an

average current density of 60 mA/cm2 or more, to generate an anode exhaust comprising Hi, CO, and CO2, and a cathode exhaust comprising 2.0 vol% or less CO2, 1.0 vol% or more O2, and 1.0 vol% or more H2O.

4. The method of any of the above claims, wherein operating tire molten carbonate fuel cell further comprises operating at a measured CO2 utilization of 75% or more, a cathode input stream having a CO2 concentration of 10 vol% or less, or a combination thereof.

5. The method of claim 4, wherein the cathode input stream comprises 5.0 vol% or less of CO2, or wherein the cathode exhaust comprises 1.0 vol% or less of CO2, or a combination thereof.

6. The method of any of the above claims, wherein the transference is 0.90 or less.

7. The method of any of the above claims, wherein the electrolyte comprises Li and one or more additional alkali metals, the electrolyte comprising a greater molar amount of the one or more additional alkali metals than a molar amount of Li.

8. The method of any of the above claims, wherein 33% or more of a molar amount of alkali metal in the electrolyte comprises potassium.

9. The method of any of the above claims, wherein the current density is 100 mA/cm2 or more (or 120 mA/cm2 or more, or 150 mA/cm2 or more).

10. The method of any of the above claims, wherein the voltage drop across the cathode is 0.4 V or less, or wherein the electricity is generated at a voltage of 0.55 V or more, or a combination thereof.

11. The method of any of the above claims, wherein a fuel utilization in the anode is 60% or more, or wherein a fuel utilization in the anode is 55% or less.

12. The method of any of the above claims, wherein a H2 concentration in the anode exhaust is 5.0 vol% or more, or wherein a combined concentration of H2 and CO in the anode exhaust is 6.0 vol% or more, or a combination thereof.

13. The method of any of the above claims, wherein the fuel cell is operated at a thermal ratio of 0.25 to 1.0.

14. The method of any of the above claims, wherein an amount of a reformable fuel introduced into the anode, into a reforming element associated with the anode, or a combination thereof, is at least about 75% greater than the amount of hydrogen reacted in the molten carbonate fuel cell to generate electricity.

15. The method of claim 1, further comprising: introducing an anode input stream into the anode of a molten carbonate fuel cell; introducing a cathode input stream comprising O2, CO2, and H2O into the cathode of the molten carbonate fuel cell.