Patents by Inventor Won-Kil Choi

Won-Kil Choi 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: 20240075432
    Abstract: Provided are a hollow fiber composite membrane for water vapor separation, comprising a hollow fiber membrane including two or more pores and a coating layer in which an interfacial polymer obtained from interfacial polymerization of water-soluble monomer and an organic monomer is coated on a surface of the hollow fiber membrane, and a chemical resistant substance is introduced in the interfacial polymer, and a method for manufacturing the same.
    Type: Application
    Filed: November 16, 2022
    Publication date: March 7, 2024
    Applicants: KOREA INSTITUTE OF ENERGY RESEARCH, KOREA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Jae Deok JEON, Soon Jin KWON, Won Kil CHOI, So Jung PARK
  • Patent number: 8551226
    Abstract: Disclosed is an exhaust gas treating system having an exhaust gas treating apparatus for carbon dioxide capture process which additionally removes harmful substances remaining in the gas discharged from the existing flue-gas desulfurization process by using separation membrane so as to efficiently carry out the carbon dioxide capture process. The exhaust gas treating system using polymer membrane, comprises a carbon dioxide capture equipment for capturing carbon dioxide from the exhaust gas of a boiler, a flue-gas denitrification equipment placed between the boiler and the carbon dioxide capture equipment, a dust-collecting equipment and a flue-gas desulfurization equipment.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: October 8, 2013
    Assignee: Korea Institute of Energy Research
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo
  • Patent number: 8496895
    Abstract: Disclosed are an exhaust gas treating apparatus and a treating method for a carbon dioxide capture process, in which harmful substances remaining in the exhaust gas discharged from the conventional flue-gas desulfurization process are additionally removed for efficient performance of the carbon dioxide capture process. According to the exhaust gas treating apparatus for a carbon dioxide capture process, it has the effects of minimizing the installation space of desulfurization equipment and reducing the process cost. In addition, by keeping the contaminants contained in the gas introduced in the carbon dioxide capture equipment below a proper level, absorption performance can be improved as degradation of the absorbent used in the carbon dioxide capture process is prevented. After all, it has an advantage of preventing the pollution by the exhaust gas discharged into the atmosphere.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: July 30, 2013
    Assignee: Korea Institute of Energy Research
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo, Chang-Keun Yi, Sung-Ho Jo, Young-Cheol Park
  • Publication number: 20130098246
    Abstract: Disclosed is an exhaust gas treating system having an exhaust gas treating apparatus for carbon dioxide capture process which additionally removes harmful substances remaining in the gas discharged from the existing flue-gas desulfurization process by using separation membrane so as to efficiently carry out the carbon dioxide capture process. The exhaust gas treating system using polymer membrane, comprises a carbon dioxide capture equipment for capturing carbon dioxide from the exhaust gas of a boiler, a flue-gas denitrification equipment placed between the boiler and the carbon dioxide capture equipment, a dust-collecting equipment and a flue-gas desulfurization equipment.
    Type: Application
    Filed: April 20, 2012
    Publication date: April 25, 2013
    Applicant: Korea Institute of Energy Research
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo
  • Publication number: 20130028820
    Abstract: Disclosed are an exhaust gas treating apparatus and a treating method for a carbon dioxide capture process, in which harmful substances remaining in the exhaust gas discharged from the conventional flue-gas desulfurization process are additionally removed for efficient performance of the carbon dioxide capture process. According to the exhaust gas treating apparatus for a carbon dioxide capture process, it has the effects of minimizing the installation space of desulfurization equipment and reducing the process cost. In addition, by keeping the contaminants contained in the gas introduced in the carbon dioxide capture equipment below a proper level, absorption performance can be improved as degradation of the absorbent used in the carbon dioxide capture process is prevented. After all, it has an advantage of preventing the pollution by the exhaust gas discharged into the atmosphere.
    Type: Application
    Filed: January 27, 2012
    Publication date: January 31, 2013
    Applicant: Korea Institute of Energy Research
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo, Chang-Keun Yi, Sung-Ho Jo, Young-Cheol Park
  • Patent number: 7455820
    Abstract: Disclosed herein is a process for removing sulfur dioxide (SO2) and nitrogen oxides (NOx) from flue gas using chlorine dioxide (ClO2). In the process, chlorine dioxide is allowed to react with flue gas in an alkaline solution so as to be able to simultaneously remove sulfur dioxide and nitrogen oxides from the flue gas. In the simultaneous removal of sulfur dioxide and nitrogen oxides from flue gas using the process, chlorine dioxide is produced by side reactions, and the produced chlorine dioxide can be used to remove sulfur dioxide and nitrogen oxides from flue gas.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: November 25, 2008
    Assignee: Korea Institute of Energy Research
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo, Dong-Seop Jin, Bal Raj Deshwal
  • Publication number: 20060239878
    Abstract: Disclosed herein is a process for removing sulfur dioxide (SO2) and nitrogen oxides (NOx) from flue gas using chlorine dioxide (ClO2). In the process, chlorine dioxide is allowed to react with flue gas in an alkaline solution so as to be able to simultaneously remove sulfur dioxide and nitrogen oxides from the flue gas. In the simultaneous removal of sulfur dioxide and nitrogen oxides from flue gas using the process, chlorine dioxide is produced by side reactions, and the produced chlorine dioxide can be used to remove sulfur dioxide and nitrogen oxides from flue gas.
    Type: Application
    Filed: December 30, 2005
    Publication date: October 26, 2006
    Inventors: Hyung-Keun Lee, Won-Kil Choi, Hang-Dae Jo, Dong-Seop Jin, Bal Deshwal