Methods and systems for converting carbon oxides to olefins
AssigneeLummus Technology Inc.
InventorsGary G. Podrebarac, Edward Katende, Zan Liu
Life of this patent
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Abstract
A method of converting carbon oxides to olefins is provided. The method can include directing a renewable hydrogen feed stream and a carbon oxide feed stream to a methanation reactor to generate an oxidative coupling of methane (OCM) feed stream that includes methane. The OCM feed stream and an oxidant feed stream including oxygen are directed to an OCM reactor containing an OCM catalyst to produce an OCM effluent that includes ethylene. A system for converting carbon oxides to olefins is also provided. The methods and systems produce olefins including ethylene with negative carbon emissions.
Claims19
A method of converting carbon oxides to olefins including ethylene (C2H4), the method comprising:
- (a) directing a renewable hydrogen (H2) feed stream and a carbon oxide feed stream comprising carbon dioxide (CO2), carbon monoxide (CO), or both CO2 and CO to a methanation reactor to generate an oxidative coupling of methane (OCM) feed stream comprising methane (CH4);
- and
- (b) directing the OCM feed stream and an oxidant feed stream comprising oxygen (O2) to an OCM reactor comprising an OCM catalyst and performing an OCM reaction to generate an OCM effluent comprising (i) C2+ compounds including C2H4 and ethane (C2H6) and (ii) non-C2+ impurities comprising one or more of CO, CO2, H2, and CH4,
- wherein the method produces olefins including C2H4 with negative carbon emissions,
- wherein the carbon oxide feed stream is a sole source of carbon utilized in the method, and
- wherein the method achieves a carbon efficiency based on the amount of carbon fed into the process from CH4 of greater than 100%.
A method of converting carbon dioxide to olefins including ethylene (C2H4), the method comprising:
- (a) directing a natural gas stream containing carbon dioxide (CO2) to a gas treatment unit to generate a CO2 feed stream and a substantially CO2-free natural gas stream;
- (b) directing a renewable hydrogen (H2) feed stream and the CO2 feed stream to a methanation reactor to generate an oxidative coupling of methane (OCM) feed stream comprising methane (CH4);
- and
- (c) directing the OCM feed stream and an oxidant feed stream comprising oxygen (O2) to an OCM reactor comprising an OCM catalyst and performing an OCM reaction to generate an OCM effluent comprising (i) C2+ compounds including C2H4 and ethane (C2H6) and (ii) non-C2+ impurities comprising one or more of CO, CO2, H2, and CH4,
- wherein the method produces olefins including C2H4 with negative carbon emissions.
A method of converting carbon oxides to olefins including ethylene (C2H4), the method comprising:
- (a) directing a renewable hydrogen (H2) feed stream and a carbon oxide feed stream comprising carbon dioxide (CO2), carbon monoxide (CO), or both CO2 and CO to a methanation reactor to generate an oxidative coupling of methane (OCM) feed stream comprising methane (CH4);
- and
- (b) directing the OCM feed stream and an oxidant feed stream comprising oxygen (O2) to an OCM reactor comprising an OCM catalyst and performing an OCM reaction to generate an OCM effluent comprising (i) C2+ compounds including C2H4 and ethane (C2H6) and (ii) non-C2+ impurities comprising one or more of CO, CO2, H2, and CH4,
- wherein the method produces olefins including C2H4 with negative carbon emissions, and
- wherein the carbon oxide feed stream is a sole source of carbon utilized in the method.
Dependencies are inferred from the claim text.