Combined Capture and Conversion of CO2 to Methanol in a Post Combustion Capture Solvent
AssigneeBattelle Memorial Institute
InventorsJotheeswari Kothandaraman, Johnny Saavedra Lopez, Yuan Jiang, Robert A. Dagle, David J. Heldebrant
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Abstract
An efficient and selective catalyst for the condensed phase hydrogenation of captured CO2 in the presence of an advanced water-lean post combustion capture solvent, EEMPA. Selected heterogenous catalysts for suppress N-methylation of the capture solvent; especially a noble metal on a reducible metal oxide support is highly selective for C—N cleavage to produce methanol.
Claims23
A method of converting CO2 to methanol comprising:
- contacting a solution comprising CO2 in an amine sorbent over a solid catalyst comprising a noble metal on a reducible metal oxide support at a temperature in the range of 181° C. to 225° C.;
- wherein the CO2 is post or pre combustion CO2;
- and
- wherein the conversion of CO2 occurs in a condensed phase and the CO2 is converted to methanol with at least 40% selectivity;
- wherein the single pass conversion of CO2 is at least 75%;
- and wherein the C2+ alcohol selectivity, or the ethanol selectivity, is at least 4 mol %.
13-18. (canceled)
A method of converting CO2 comprising:
- providing continuous flow reactor system comprising:
- an absorber;
- a pump;
- and
- a reactor;
- enriching an amine sorbent with CO2 by contacting the solvent with a flue gas comprising CO2 to create a CO2-enriched solution in the absorber;
- pressurizing the CO2-enriched solution to between 30 and 100 bar H2;
- heating the CO2-enriched solution;
- producing a heated and pressurized CO2-enriched solution;
- feeding the heated and pressurized CO2-enriched solution with pressurized H2 gas into a reactor comprising a solid catalyst comprising a noble metal on a reducible metal oxide support and reacting the solution over the solid catalyst at a temperature of between 181 and 225° C.;
- and
- producing a product solution in which the CO2 in the solution is converted into methanol, C2+ alcohols, CH4, and light hydrocarbons over the solid catalyst.
25-40. (canceled)
A composition of matter comprising an amine solvent, CO2, and a heterogenous catalyst, and methanol derived from the carbon dioxide, wherein the methanol derived from the CO2 makes up at least 1% of mass percent of the CO2 and wherein the molar ratio of the methanol produced from CO2 to ethyl formate in the composition is greater than 2.
43-45. (canceled)
Dependencies are inferred from the claim text.