Patents by Inventor Ravi Ravikumar

Ravi Ravikumar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230042038
    Abstract: In a hydrocarbon-fed steam methane reformer hydrogen-production process and system, carbon dioxide is recovered in a pre-combustion context, and optionally additional amounts of carbon dioxide are recovered in a post-combustion carbon dioxide removal, to provide the improved carbon dioxide recovery or capture disclosed herein.
    Type: Application
    Filed: October 13, 2022
    Publication date: February 9, 2023
    Applicant: Fluor Technologies Corporation
    Inventors: Ravi RAVIKUMAR, Sunil SINGHAL
  • Patent number: 11505462
    Abstract: In a hydrocarbon-fed steam methane reformer hydrogen-production process and system, carbon dioxide is recovered in a pre-combustion context, and optionally additional amounts of carbon dioxide are recovered in a post-combustion carbon dioxide removal, to provide the improved carbon dioxide recovery or capture disclosed herein.
    Type: Grant
    Filed: February 15, 2021
    Date of Patent: November 22, 2022
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Sunil Singhal
  • Publication number: 20220340419
    Abstract: Ammonia, methanol, Fischer Tropsch products, and derivatives thereof are made by using hydrogen and oxygen supplied from an electrolyzer that is at least partially powered by renewable power, resulting in green process and systems that produce green products disclosed herein. A process using biomass and renewable energy includes producing an unshifted syngas from biomass and oxygen in a gasification unit, introducing water into an electrolyzer to produce an oxygen product and a hydrogen product, and introducing the oxygen product to the gasification unit. The electrolyzer is powered by renewable energy, and the oxygen product supplies at least a portion of the oxygen to the gasification unit.
    Type: Application
    Filed: April 20, 2022
    Publication date: October 27, 2022
    Applicant: Fluor Technologies Corporation
    Inventors: Ravi RAVIKUMAR, Sunil SINGHAL, Soumya Jyoti CHOUDHURY, Kakul SINGH
  • Publication number: 20220267147
    Abstract: A process for reforming for producing hydrogen and generating electricity, comprises: introducing a feed comprising a hydrocarbon stream to a reformer to produce unshifted synthesis gas (syngas); introducing the unshifted syngas to a water gas shift unit to produce a shifted syngas; removing CO2 from the shifted syngas to produce a CO2 depleted syngas and a CO2 product; introducing the CO2 depleted syngas to a pressure swing adsorption unit to produce a hydrogen product and an off-gas comprising carbon monoxide, carbon dioxide, unreacted methane; splitting a portion of the hydrogen product; and providing the portion of the hydrogen product to an electricity generator for generating electricity for use within the process.
    Type: Application
    Filed: February 22, 2022
    Publication date: August 25, 2022
    Applicant: Fluor Technologies Corporation
    Inventors: Ravi RAVIKUMAR, Sunil SINGHAL
  • Publication number: 20220259042
    Abstract: In a hydrocarbon-fed steam methane reformer hydrogen-production process and system, carbon dioxide is recovered in a pre-combustion context, and optionally additional amounts of carbon dioxide are recovered in a post-combustion carbon dioxide removal, to provide the improved carbon dioxide recovery or capture disclosed herein.
    Type: Application
    Filed: February 15, 2021
    Publication date: August 18, 2022
    Applicant: Fluor Technologies Corporation
    Inventors: Ravi RAVIKUMAR, Sunil SINGHAL
  • Patent number: 10590349
    Abstract: Embodiments relate generally to systems and method for processing tars to produce benzene, toluene, and xylene (BTX). A method for processing tars may comprise distilling the tars to separate creosotes and pitch; and processing the pitch via hydropyrolysis, including both hydrogenation and hydrocracking functions, to remove heteroatoms and break down polyaromatics in the pitch and produce monoaromatics, such as BTX. A system for processing tars may comprise one or more of the following: an input stream comprising tars feeding into a column; the column configured to separate the tars into one or more creosote streams and a pitch stream; and a reactor (or a series of reactors, or beds within a single reactor), wherein the pitch stream is fed to the reactor along with a stream of hydrogen, wherein the reactor is configured to break down the pitch to produce BTX.
    Type: Grant
    Filed: June 13, 2017
    Date of Patent: March 17, 2020
    Assignee: Fluor Technologies Corporation
    Inventors: Paul E. Koppel, Ravi Ravikumar
  • Patent number: 10287507
    Abstract: A method of producing fuel from CO2 comprising introducing natural gas, steam, and recovered CO2 to a reformer to produce unshifted syngas characterized by a molar ratio of hydrogen to carbon monoxide of from about 1.7:1 to about 2.5:1; introducing the unshifted syngas to a water gas shift unit to produce a shifted syngas, wherein an amount of CO2 in the shifted syngas is greater than in the unshifted syngas; separating the CO2 from the shifted syngas to produce recycle CO2 and a hydrogen-enriched syngas; recycling the recycle CO2 to the reformer; introducing the unshifted syngas to a Fischer-Tropsch (FT) unit to produce an FT product, FT water, and FT tail gas, wherein the FT product comprises FT liquids and FT wax; and separating the FT liquids from the FT product to produce a fuel.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: May 14, 2019
    Assignee: Fluor Technologies Corporation
    Inventor: Ravi Ravikumar
  • Patent number: 10221115
    Abstract: A method of diverting municipal solid waste (MSW) from a landfill that includes receiving, at a MSW processing system, a quantity of MSW, gasifying the quantity of MSW in a gasification unit to yield a syngas stream and biochar stream, converting at least a portion of the syngas to mixed alcohols in an alcohol synthesis unit, separating the mixed alcohols into one or more alcohol products, and determining a carbon offset for diverting the MSW from the landfill to the MSW processing system.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: March 5, 2019
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Jim Wilson, Denny Li
  • Patent number: 10144877
    Abstract: A method of processing stranded remote gas comprising (a) introducing stranded remote gas and steam to a reforming unit to produce synthesis gas (syngas), wherein the stranded remote gas comprises methane, carbon dioxide, and sulfur-containing compounds, and wherein the syngas is characterized by a molar ratio of hydrogen to carbon monoxide of from about 1.7:1 to about 2.5:1; (b) introducing at least a portion of the syngas to a Fischer-Tropsch (FT) unit to produce an FT syncrude product, FT water, and FT tail gas, wherein the FT syncrude product comprises FT hydrocarbon liquids, wherein the FT syncrude product comprises FT wax in an amount of less than about 5 wt. %, and wherein the FT unit is characterized by an FT reaction temperature of from about 300° C. to about 350° C.; and (c) blending the FT syncrude product with crude oil for storage and/or transport.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: December 4, 2018
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Paul Koppel, Sanjiv Dabee
  • Patent number: 10112829
    Abstract: A method of producing hydrogen comprising receiving a sour gas comprising CO2, H2S, and ammonia from a sour water stripper; introducing the sour gas to an absorption system to produce an ammonia rich gas and a sulfide rich gas, wherein the ammonia rich gas comprises ammonia and CO2, and wherein the sulfide rich gas comprises H2S and CO2; compressing the ammonia rich gas in a compressing unit to a pressure of 400-600 psig to produce a compressed ammonia rich gas; introducing the compressed ammonia rich gas to an ammonia cracker unit comprising a catalyst to produce a cracked gas, wherein the ammonia cracker unit is characterized by a cracking temperature of 450-550° C., and wherein the cracked gas comprises hydrogen, nitrogen, and CO2; and introducing the cracked gas to a PSA unit to produce hydrogen and a PSA tail gas, wherein the PSA tail gas comprises nitrogen and CO2.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: October 30, 2018
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Paul M. Mathias
  • Patent number: 10040736
    Abstract: Systems and methods for generating higher alcohols from synthesis gas produced from carbonaceous materials are described, which can include a reactor configured to produce an alcohol stream and CO2 from a syngas feed. The alcohol stream can be separated in one or more downstream separators to produce a net reactor product and a methanol stream that can recycled into the reactor. The net reactor product preferably comprises higher-order alcohols such as ethanol, propanol, and butanol.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: August 7, 2018
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Denny Li
  • Patent number: 9856141
    Abstract: A method of producing syngas comprising receiving raw syngas from a gasification unit; introducing the raw syngas and water to a syngas scrubber to produce unshifted syngas; introducing a first portion of unshifted syngas to a first cooling unit to produce cooled unshifted syngas and a first aqueous condensate comprising cyanide in an amount of 5-200 ppmw; recycling the first aqueous condensate to the syngas scrubber; introducing a second portion of unshifted syngas to a water gas shift unit to produce shifted syngas; introducing the shifted syngas to a second cooling unit to produce cooled shifted syngas and a second aqueous condensate comprising cyanide in an amount of less than 2.5 ppmw; contacting the cooled shifted syngas with the cooled unshifted syngas to produce modified syngas; and introducing the second aqueous condensate to a sour water stripper to produce stripped water and an acid gas comprising H2S, CO2, and ammonia.
    Type: Grant
    Filed: January 7, 2016
    Date of Patent: January 2, 2018
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Patrick Goodman, Sanjiv Dabee
  • Publication number: 20170355911
    Abstract: Embodiments relate generally to systems and method for processing tars to produce benzene, toluene, and xylene (BTX). A method for processing tars may comprise distilling the tars to separate creosotes and pitch; and processing the pitch via hydropyrolysis, including both hydrogenation and hydrocracking functions, to remove heteroatoms and break down polyaromatics in the pitch and produce monoaromatics, such as BTX. A system for processing tars may comprise one or more of the following: an input stream comprising tars feeding into a column; the column configured to separate the tars into one or more creosote streams and a pitch stream; and a reactor (or a series of reactors, or beds within a single reactor), wherein the pitch stream is fed to the reactor along with a stream of hydrogen, wherein the reactor is configured to break down the pitch to produce BTX.
    Type: Application
    Filed: June 13, 2017
    Publication date: December 14, 2017
    Inventors: Paul E. Koppel, Ravi Ravikumar
  • Patent number: 9815692
    Abstract: A crude oil processing plant that comprises a Fischer-Tropsch reactor is disclosed. The crude oil processing plant comprises a crude oil processing section and a hydrogen production section. The hydrogen production section is coupled to a hydrocracker in the crude oil processing section to deliver a high purity hydrogen stream. The Fischer-Tropsch reactor receives a syngas stream from the hydrogen production section and produces a hydrocarbon stream. When light crude oil is processed, the hydrocracker typically has excess capacities to upgrade the hydrocarbon stream from the Fischer-Tropsch reactor.
    Type: Grant
    Filed: July 28, 2015
    Date of Patent: November 14, 2017
    Assignee: Fluor Technologies Corporation
    Inventors: Ravi Ravikumar, Paul E. Koppel, Sanjiv Dabee, Johnathon Zychowicz
  • Publication number: 20170218279
    Abstract: A method of processing stranded remote gas comprising (a) introducing stranded remote gas and steam to a reforming unit to produce synthesis gas (syngas), wherein the stranded remote gas comprises methane, carbon dioxide, and sulfur-containing compounds, and wherein the syngas is characterized by a molar ratio of hydrogen to carbon monoxide of from about 1.7:1 to about 2.5:1; (b) introducing at least a portion of the syngas to a Fischer-Tropsch (FT) unit to produce an FT syncrude product, FT water, and FT tail gas, wherein the FT syncrude product comprises FT hydrocarbon liquids, wherein the FT syncrude product comprises FT wax in an amount of less than about 5 wt. %, and wherein the FT unit is characterized by an FT reaction temperature of from about 300° C. to about 350° C.; and (c) blending the FT syncrude product with crude oil for storage and/or transport.
    Type: Application
    Filed: February 1, 2016
    Publication date: August 3, 2017
    Inventors: Ravi Ravikumar, Paul Koppel, Sanjiv Dabee
  • Publication number: 20170203963
    Abstract: A method of producing hydrogen comprising receiving a sour gas comprising CO2, H2S, and ammonia from a sour water stripper; introducing the sour gas to an absorption system to produce an ammonia rich gas and a sulfide rich gas, wherein the ammonia rich gas comprises ammonia and CO2, and wherein the sulfide rich gas comprises H2S and CO2; compressing the ammonia rich gas in a compressing unit to a pressure of 400-600 psig to produce a compressed ammonia rich gas; introducing the compressed ammonia rich gas to an ammonia cracker unit comprising a catalyst to produce a cracked gas, wherein the ammonia cracker unit is characterized by a cracking temperature of 450-550° C., and wherein the cracked gas comprises hydrogen, nitrogen, and CO2; and introducing the cracked gas to a PSA unit to produce hydrogen and a PSA tail gas, wherein the PSA tail gas comprises nitrogen and CO2.
    Type: Application
    Filed: January 19, 2016
    Publication date: July 20, 2017
    Inventors: Ravi Ravikumar, Paul M. Mathias
  • Publication number: 20170204335
    Abstract: A method of producing fuel from CO2 comprising introducing natural gas, steam, and recovered CO2 to a reformer to produce unshifted syngas characterized by a molar ratio of hydrogen to carbon monoxide of from about 1.7:1 to about 2.5:1; introducing the unshifted syngas to a water gas shift unit to produce a shifted syngas, wherein an amount of CO2 in the shifted syngas is greater than in the unshifted syngas; separating the CO2 from the shifted syngas to produce recycle CO2 and a hydrogen-enriched syngas; recycling the recycle CO2 to the reformer, introducing the unshifted syngas to a Fischer-Tropsch (FT) unit to produce an FT product, FT water, and FT tail gas, wherein the FT product comprises FT liquids and FT wax; and separating the FT liquids from the FT product to produce a fuel.
    Type: Application
    Filed: January 19, 2016
    Publication date: July 20, 2017
    Inventor: Ravi Ravikumar
  • Publication number: 20170197827
    Abstract: A method of producing syngas comprising receiving raw syngas from a gasification unit; introducing the raw syngas and water to a syngas scrubber to produce unshifted syngas; introducing a first portion of unshifted syngas to a first cooling unit to produce cooled unshifted syngas and a first aqueous condensate comprising cyanide in an amount of 5-200 ppmw; recycling the first aqueous condensate to the syngas scrubber; introducing a second portion of unshifted syngas to a water gas shift unit to produce shifted syngas; introducing the shifted syngas to a second cooling unit to produce cooled shifted syngas and a second aqueous condensate comprising cyanide in an amount of less than 2.5 ppmw; contacting the cooled shifted syngas with the cooled unshifted syngas to produce modified syngas; and introducing the second aqueous condensate to a sour water stripper to produce stripped water and an acid gas comprising H2S, CO2, and ammonia.
    Type: Application
    Filed: January 7, 2016
    Publication date: July 13, 2017
    Inventors: Ravi Ravikumar, Patrick Goodman, Sanjiv Dabee
  • Patent number: 9440181
    Abstract: A sulfuric acid production plant has a discontinuously operating back-up absorber to allow for sulfur emission control in situations where part of or even the entire sulfuric acid production plant is shut down, inoperable, or otherwise compromised. The back-up absorber receives lean solvent from a storage tank that is configured such that continuous operation of the back-up absorber is possible for several hours.
    Type: Grant
    Filed: November 17, 2011
    Date of Patent: September 13, 2016
    Assignee: Fluor Corporation
    Inventors: Ravi Ravikumar, Richard Bazata
  • Publication number: 20160194262
    Abstract: A method of diverting municipal solid waste (MSW) from a landfill that includes receiving, at a MSW processing system, a quantity of MSW, gasifying the quantity of MSW in a gasification unit to yield a syngas stream and biochar stream, converting at least a portion of the syngas to mixed alcohols in an alcohol synthesis unit, separating the mixed alcohols into one or more alcohol products, and determining a carbon offset for diverting the MSW from the landfill to the MSW processing system.
    Type: Application
    Filed: March 14, 2016
    Publication date: July 7, 2016
    Inventors: Ravi Ravikumar, Jim Wilson, Denny Li