CPC C07C 29/1518 (2013.01) [C01B 3/16 (2013.01); C07C 29/154 (2013.01); C01B 2203/061 (2013.01); C01B 2203/1076 (2013.01)] | 9 Claims |
1. An integrated process for synthesizing methanol from CO2 and generating electricity from a hydrocarbon feedstock, wherein the process comprising the steps of:
(i) gasifying the hydrocarbon feedstock and oxygen inside a gasification unit to produce a syngas, wherein the syngas is used as a fuel for electrical power generation inside a power generation unit, wherein the power generation unit is configured to produce an exhaust stream, and wherein the exhaust stream comprises CO2 and water;
(ii)reusing a first part of the exhaust stream of the power generation unit as a reactant in the gasification unit, wherein the first part of the exhaust stream comprises a fixed portion of CO2 and water;
(iii) using a second part of the exhaust stream of the power generation unit as a reactant for methanol generation in a methanol reactor, wherein the second part of the exhaust stream is treated to separate CO2 and water, and the separated CO2 is used as the reactant for methanol synthesis;
(iv) operating an electrolyzer during non-peak hours to produce hydrogen and oxygen as a by-product, wherein a required stoichiometric ratio of the produced hydrogen is transferred into the methanol reactor for methanol synthesis, wherein a Cu/Zn-based catalyst system is used inside the methanol reactor for methanol synthesis through direct hydrogenation reaction of CO2; and
(v)recovering and reusing oxygen by-product from the electrolyzer, wherein the oxygen by-product is used as a gasifying agent in the gasification unit and a combustion agent in the power generation unit.
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