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Sung-hwan Han - One of the best experts on this subject based on the ideXlab platform.

  • development of zno al2o3 catalyst for reverse water gas shift reaction of camere Carbon Dioxide Hydrogenation to form methanol via a reverse water gas shift reaction process
    Applied Catalysis A-general, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Development of ZnO/Al2O3 catalyst for reverse-water-gas-shift reaction of CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process
    Applied Catalysis A: General, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas- shift reaction (the CAMERE process)
    Industrial and Engineering Chemistry Research, 1999
    Co-Authors: Oh Shim Joo, Alexander Ya Rozovskii, Galina I. Lin, Sung-hwan Han, Kwang-deog Jung, Il Moon, Sung Jin Uhm
    Abstract:

    The CAMERE process (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO2 Hydrogenation. Carbon Dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as the recycle gas volume decreased. Because of the minimum purge gas loss by the pretreatment of RWReactor, the overall methanol yield increased up to 89% from 69%. An active and stable catalyst with the composition of Cu/ ZnO/ZrO2/Ga2O3 (5:3:1:1) was developed. The system was optimized and compared with the commercial methanol synthesis processes from natural gas and coal.

Oh Shim Joo - One of the best experts on this subject based on the ideXlab platform.

  • development of zno al2o3 catalyst for reverse water gas shift reaction of camere Carbon Dioxide Hydrogenation to form methanol via a reverse water gas shift reaction process
    Applied Catalysis A-general, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Development of ZnO/Al2O3 catalyst for reverse-water-gas-shift reaction of CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process
    Applied Catalysis A: General, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas- shift reaction (the CAMERE process)
    Industrial and Engineering Chemistry Research, 1999
    Co-Authors: Oh Shim Joo, Alexander Ya Rozovskii, Galina I. Lin, Sung-hwan Han, Kwang-deog Jung, Il Moon, Sung Jin Uhm
    Abstract:

    The CAMERE process (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO2 Hydrogenation. Carbon Dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as the recycle gas volume decreased. Because of the minimum purge gas loss by the pretreatment of RWReactor, the overall methanol yield increased up to 89% from 69%. An active and stable catalyst with the composition of Cu/ ZnO/ZrO2/Ga2O3 (5:3:1:1) was developed. The system was optimized and compared with the commercial methanol synthesis processes from natural gas and coal.

Kwang-deog Jung - One of the best experts on this subject based on the ideXlab platform.

  • development of zno al2o3 catalyst for reverse water gas shift reaction of camere Carbon Dioxide Hydrogenation to form methanol via a reverse water gas shift reaction process
    Applied Catalysis A-general, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Development of ZnO/Al2O3 catalyst for reverse-water-gas-shift reaction of CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process
    Applied Catalysis A: General, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas- shift reaction (the CAMERE process)
    Industrial and Engineering Chemistry Research, 1999
    Co-Authors: Oh Shim Joo, Alexander Ya Rozovskii, Galina I. Lin, Sung-hwan Han, Kwang-deog Jung, Il Moon, Sung Jin Uhm
    Abstract:

    The CAMERE process (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO2 Hydrogenation. Carbon Dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as the recycle gas volume decreased. Because of the minimum purge gas loss by the pretreatment of RWReactor, the overall methanol yield increased up to 89% from 69%. An active and stable catalyst with the composition of Cu/ ZnO/ZrO2/Ga2O3 (5:3:1:1) was developed. The system was optimized and compared with the commercial methanol synthesis processes from natural gas and coal.

Sang Woo Park - One of the best experts on this subject based on the ideXlab platform.

  • development of zno al2o3 catalyst for reverse water gas shift reaction of camere Carbon Dioxide Hydrogenation to form methanol via a reverse water gas shift reaction process
    Applied Catalysis A-general, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

  • Development of ZnO/Al2O3 catalyst for reverse-water-gas-shift reaction of CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process
    Applied Catalysis A: General, 2001
    Co-Authors: Sang Woo Park, Oh Shim Joo, Kwang-deog Jung, Hyo Kim, Sung-hwan Han
    Abstract:

    Abstract ZnO and ZnO/Al2O3 catalysts were studied for a reverse-water-gas-shift reaction (RWReaction). The catalytic activities depended on the compositions of Zn and Al at the temperature range of 673–973 K and GHSV of 15,000. The activities were close to the equilibrium conversion at temperatures above 873 K. The catalysts were characterized by using BET, TPR, XRD, SEM, and TEM. The ZnO/Al2O3 catalysts were mixtures of ZnO and ZnAl2O4 phases, and the particle size of the ZnO was strongly dependent on its composition in the ZnO/Al2O3 catalysts. ZnO/Al2O3 (Zn:Al=1:1) catalyst has the smallest particle size of ZnO and its conversion of CO2 at 873 K and GHSV of 150,000 was 43%. The stability of ZnO/Al2O3 catalysts increased in the presence of the large particles of ZnO. Hence, ZnO/Al2O3 (Zn:Al=4:1) catalyst was more stable than the ZnO/Al2O3 (Zn:Al=1:1) catalyst. The conversion of CO2 on the ZnO/Al2O3 (Zn:Al=1:1) catalyst decreased from 43 to 17% in 48 h. The ZnO in ZnO/Al2O3 catalysts was reduced to the Zn metal during the RWReaction, which contributed to the deactivation of the ZnO/Al2O3 catalysts. Meanwhile, the activity of ZnAl2O4 catalyst was stable for 100 h at 873 K and GHSV of 150,000. The ZnAl2O4 catalyst was developed for the RWReaction of the CAMERE (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) process for methanol formation from CO2.

Sung Jin Uhm - One of the best experts on this subject based on the ideXlab platform.

  • Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas- shift reaction (the CAMERE process)
    Industrial and Engineering Chemistry Research, 1999
    Co-Authors: Oh Shim Joo, Alexander Ya Rozovskii, Galina I. Lin, Sung-hwan Han, Kwang-deog Jung, Il Moon, Sung Jin Uhm
    Abstract:

    The CAMERE process (Carbon Dioxide Hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO2 Hydrogenation. Carbon Dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as the recycle gas volume decreased. Because of the minimum purge gas loss by the pretreatment of RWReactor, the overall methanol yield increased up to 89% from 69%. An active and stable catalyst with the composition of Cu/ ZnO/ZrO2/Ga2O3 (5:3:1:1) was developed. The system was optimized and compared with the commercial methanol synthesis processes from natural gas and coal.