Hydrogen utilization and carbon recovery
View Patent ↗A method for upgrading bio-mass material is provided. The method involves electrolytic reduction of the material in an electrochemical cell having a ceramic, oxygen-ion conducting membrane, where the membrane includes an electrolyte. One or more oxygenated or partially-oxygenated compounds are reduced by applying an electrical potential to the electrochemical cell. A system for upgrading bio-mass material is also disclosed.
1. A system for electrolytic reduction of a bio-mass material, comprising:
a pyrolyzer configured for receiving the bio-mass material and further configured for pyrolyzing the bio-mass material to generate at least a condensable bio-mass vapor;
an electrochemical deoxygenation unit in fluid communication with the pyrolyzer for receiving the condensable bio-mass vapor from the pyrolyzer, the electrochemical deoxygenation unit including:
an anode configured for residing in an oxidizing environment;
a cathode comprising a first surface and a second surface;
a fluid conduit adjacent to a first surface of the cathode, the fluid conduit adapted to convey the condensable bio-mass vapor such that the condensable bio-mass vapor contacts the first surface of the cathode;
an oxygen-ion conducting membrane located between the second surface of the cathode and the anode, and further separating the anode from the fluid conduit, wherein the fluid conduit and the oxygen-ion conducting membrane are configured such that the condensable bio-mass vapors will not contact the anode; and
a power source that applies an electric potential between the cathode and anode;
an oxygen conveyance outlet for releasing oxygen generated from the electrochemical deoxygenation unit; and
a hydrocarbon conveyance outlet for releasing hydrocarbon vapors generated from the electrochemical deoxygenation unit; and
a condenser downstream of the electrochemical deoxygenation unit and in fluid communication with the electrochemical deoxygenation unit via the hydrocarbon conveyance outlet, the condenser configured to condense the hydrocarbon vapors generated from the electrochemical deoxygenation unit into a mixture of hydrocarbon gases and liquids.
2. The system of claim 1 , further comprising an electrolytic layer, wherein the electrolytic layer comprises zirconia or ceria doped with trivalent cations.
3. The system of claim 2 , wherein the trivalent cations are selected from yttria, scandia, ytterbia, samaria, gadolinia, and combinations thereof.
4. The system of claim 1 , further comprising an electrolytic layer, wherein the electrolytic layer comprises strontium and magnesium doped lanthanum gallate.
5. The system of claim 1 , wherein the anode comprises doped lanthanum manganite, doped lanthanum cobaltite, doped lanthanum cobalt ferrite, electron conducting ceramics belonging to the family of perovskites or pyrochlores, oxygen ion-electron conducting ceramics belonging to the family of perovskites or pyrochlores, nickel-doped zirconia, nickel-doped ceria, nickel, cobalt, molybdenum, ruthenium, platinum, praseodymium, cerium, other elements from the rare earth element group or from the precious metal group, or combinations thereof.
6. The system of claim 1 , wherein the cathode comprises doped lanthanum manganite, doped lanthanum cobaltite, doped lanthanum cobalt ferrite, electron conducting ceramics belonging to the family of perovskites or pyrochlores, oxygen ion-electron conducting ceramics belonging to the family of perovskites or pyrochlores, nickel-doped zirconia, nickel-doped ceria, nickel, cobalt, molybdenum, ruthenium, platinum, praseodymium, cerium, other elements from the rare earth element group or from the precious metal group, or combinations thereof.
7. A system for electrolytic reduction of a bio-mass material, comprising:
a pyrolyzer configured for receiving the bio-mass material and further configured for pyrolyzing the bio-mass material to generate at least a condensable bio-mass vapor;
an electrochemical deoxygenation unit in fluid communication with the pyrolyzer for receiving the condensable bio-mass vapor from the pyrolyzer, the electrochemical deoxygenation unit including:
an anode configured for residing in an oxidizing environment, the anode having a first power receptacle;
a cathode comprising a first surface and a second surface, the cathode having a second power receptacle, wherein the first and second power receptacles are configured for receiving power that applies an electric potential between the cathode and the anode;
a fluid conduit adjacent to a first surface of the cathode, the fluid conduit adapted to convey the condensable bio-mass vapor such that the condensable bio-mass vapor contacts the first surface of the cathode;
an oxygen-ion conducting membrane located between the second surface of the cathode and the anode, and further separating the anode from the fluid conduit, wherein the fluid conduit and the oxygen-ion conducting membrane are configured such that the condensable bio-mass vapors will not contact the anode; and
an oxygen conveyance outlet for releasing oxygen generated from the electrochemical deoxygenation unit; and
a hydrocarbon conveyance outlet for releasing hydrocarbon vapors generated from the electrochemical deoxygenation unit; and
a condenser downstream of the electrochemical deoxygenation unit and in fluid communication with the electrochemical deoxygenation unit via the hydrocarbon conveyance outlet, the condenser configured to condense the hydrocarbon vapors generated from the electrochemical deoxygenation unit into a mixture of hydrocarbon gases and liquids.
8. The system of claim 7 , further comprising an electrolytic layer, wherein the electrolytic layer comprises zirconia or ceria doped with trivalent cations.
9. The system of claim 8 , wherein the trivalent cations are selected from yttria, scandia, ytterbia, samaria, gadolinia, and combinations thereof.
10. The system of claim 7 , further comprising an electrolytic layer, wherein the electrolytic layer comprises strontium and magnesium doped lanthanum gallate.
11. The system of claim 7 , wherein the anode comprises doped lanthanum manganite, doped lanthanum cobaltite, doped lanthanum cobalt ferrite, electron conducting ceramics belonging to the family of perovskites or pyrochlores, oxygen ion-electron conducting ceramics belonging to the family of perovskites or pyrochlores, nickel-doped zirconia, nickel-doped ceria, nickel, cobalt, molybdenum, ruthenium, platinum, praseodymium, cerium, other elements from the rare earth element group or from the precious metal group, or combinations thereof.
12. The system of claim 7 , wherein the cathode comprises doped lanthanum manganite, doped lanthanum cobaltite, doped lanthanum cobalt ferrite, electron conducting ceramics belonging to the family of perovskites or pyrochlores, oxygen ion-electron conducting ceramics belonging to the family of perovskites or pyrochlores, nickel-doped zirconia, nickel-doped ceria, nickel, cobalt, molybdenum, ruthenium, platinum, praseodymium, cerium, other elements from the rare earth element group or from the precious metal group, or combinations thereof.
13. The system of claim 7 further comprising a power source that applies an electric potential between the cathode and anode.
14. The system of claim 7 , wherein the pyrolyzer configured for pyrolyzing the bio-mass material to generate the at least a condensable bio-mass vapor is further configured to generate steam.
15. The system of claim 14 , wherein hydrogen is provided to the cathode in situ from electrolysis of the steam.
16. The system of claim 1 , wherein the pyrolyzer configured for pyrolyzing the bio-mass material to generate the at least a condensable bio-mass vapor is further configured to generate steam.
17. The system of claim 16 , wherein hydrogen is provided to the cathode in situ from electrolysis of the steam.