US 11,773,039 B2
Integrated process and Cu/Zn-based catalyst for synthesizing methanol utilizing CO2, generating electricity from hydrocarbon feedstock
Siva Rama Krishna Garapati, Faridabad (IN); Meeta Sharma, Faridabad (IN); Mani Ramya, Faridabad (IN); Rajesh Muralidhar Badhe, Faridabad (IN); Alok Sharma, Faridabad (IN); Gurpreet Kapur Singh, Faridabad (IN); and Sankara Sri Venkata Ramakumar, Faridabad (IN)
Assigned to INDIAN OIL CORPORATION LIMITED, Mumbai (IN)
Filed by Indian Oil Corporation Limited, Mumbai (IN)
Filed on Sep. 30, 2022, as Appl. No. 17/937,099.
Claims priority of application No. 202121044692 (IN), filed on Oct. 1, 2021.
Prior Publication US 2023/0104011 A1, Apr. 6, 2023
Int. Cl. C07C 29/151 (2006.01); C01B 3/16 (2006.01); C07C 29/154 (2006.01)
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
OG exemplary drawing
 
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.