Composite mixed carbonate ion and electron conducting membranes and reactant gas assisted chemical reactors for CO2 separation and capture

摘要

The present disclosure relates to a system for carbon dioxide seperation and capture. The system includes a porous metal membrane comprising Ni, Ag, or combinations thereof and having molten carbonate within the pores. A CO2 containing flue gas input stream is separated from a reactant gas input stream by the membrane. The CO2 is removed from the flue gas input stream as it contacts the membrane resulting in a CO2 free flue gas output stream and a CO2 containing reactant gas output stream.

主权项

1. A system for carbon dioxide separation and capture comprising:
a porous metal membrane comprising Ni, Ag, or combinations thereof and having molten carbonate within the pores; a CO2 and O2 containing flue gas input stream configured to contact a first surface of the membrane; and a reactant gas input stream containing reactants consisting of CO and/or H2,the flue gas input stream being separated from the reactant gas input stream by the membrane, the reactant gas input stream being, configured to contact a second surface of the membrane, wherein the CO2 and O2of the flue gas input stream react as the flue gas input stream contacts the first surface of the membrane to form a carbonate ion according to the following reaction:
CO2+½O2+2e−→CO32−, the carbonate ion migrating across the porous membrane to contact the reactant gas input stream at the second surface of the membrane, the carbonate ion reacting with the CO and/or H2 of the reactant gas input stream according to the following reactions:
H2+CO32−→H2O+CO2+2e− and/orCO +CO32−→2CO2+2e− resulting in a CO2 free flue gas output stream and a CO2 containing reactant gas output stream.