Methods and systems for the conversion of carbon dioxide to chemicals and/or fuels utilizing steam electrolysis
AssigneeChevron U.S.A. Inc.
InventorsZihan Huang, Lin Li
Life of this patent
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Abstract
A method includes heating a steam feed stream received from a reactor unit in a first heat exchanger using an anode effluent from an anode of an electrolyzer as a heat transfer medium to generate a first heated steam effluent, heating the first heated steam effluent in a second heat exchanger using a cathode effluent from a cathode of the electrolyzer as a heat transfer medium to generate a second heated steam effluent, combusting, in a combustion unit, a first tail gas stream to transfer heat to the second heated steam effluent to generate a third heated steam effluent, and passing the third heated steam effluent to the cathode of the electrolyzer.
Claims18
A method, comprising:
- heating a steam feed stream having a temperature of from about 250° C. to about 350° C. received from a reactor unit in a first heat exchanger using an anode effluent from an anode of an electrolyzer comprising an anode, a cathode, and an electrolyte inserted between the anode and the cathode as a heat transfer medium to generate a first heated steam effluent having a temperature of about 350° C. to about 450° C. and a cooled anode effluent;
- heating the first heated steam effluent in a second heat exchanger using a cathode effluent from the cathode of the electrolyzer as a heat transfer medium to generate a second heated steam effluent having a temperature of about 550° C. to about 650° C. and a cooled cathode effluent;
- combusting, in a combustion unit, a first tail gas stream to transfer heat to the second heated steam effluent to generate a third heated steam effluent having a temperature of about 700° C. to about 950° C.;
- and
- passing the third heated steam effluent to the cathode of the electrolyzer.
A method, comprising:
- heating a water feed stream in a first heat exchanger using a reactor synthesis effluent including tail gas from a reactor unit as a heat transfer medium to generate a heated water effluent having a temperature of about 50° C. to about 150° C.;
- performing an exothermic reaction in the reactor unit thereby transferring heat from the exothermic reaction to the heated water effluent to generate a steam feed stream having a temperature of about 250° C. to about 350° C.;
- heating the steam feed stream in a second heat exchanger using an anode effluent from an anode of an electrolyzer comprising an anode, a cathode, and an electrolyte inserted between the anode and the cathode as a heat transfer medium to generate a first heated steam effluent having a temperature of about 350° C. to about 450° C. and a cooled anode effluent;
- heating the first heated steam effluent in a third heat exchanger using a cathode effluent from the cathode of the electrolyzer as a heat transfer medium to generate a second heated steam effluent having a temperature of about 550° C. to about 650° C. and a cooled cathode effluent;
- combusting, in a combustion unit, a first tail gas stream to transfer heat to the second heated steam effluent to generate a third heated steam effluent having a temperature of about 700° C. to about 950° C.;
- and
- passing the third heated steam effluent to the cathode of the electrolyzer.
Dependencies are inferred from the claim text.