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Shantung Tu - One of the best experts on this subject based on the ideXlab platform.

  • active carbon Ceramic Sphere as support of ruthenium catalysts for catalytic wet air oxidation cwao of resin effluent
    Journal of Hazardous Materials, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Abstract Active carbon–Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon–Ceramic Sphere and ruthenium catalysts were characterized by N 2 adsorption and chemisorption measurements. BET surface area and total pore volume of active carbon (AC) in the active carbon–Ceramic Sphere increase with increasing KOH-to-carbon ratio, and AC in the sample KC-120 possesses values as high as 1100 m 2  g −1 and 0.69 cm 3  g −1 (carbon percentage: 4.73 wt.%), especially. Active carbon–Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl 3 solution impregnation onto these supports, the ruthenium loading was fixed at 1–5 wt.% of AC in the support. The catalytic activity varies according to the following order: Ru/KC-120 > Ru/KC-80 > Ru/KC-60 > KC-120 > without catalysts. It is found that the 3 wt.% Ru/KC-120 catalyst displays highest stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96%, respectively at the reaction temperature of 200 °C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h −1 and the oxygen flow rate of 13.5 L h −1 .

  • Ruthenium Supported on Active Carbon-Ceramic Sphere as Catalysts for Catalytic Wet Air Oxidation (CWAO) of Resin Effluent
    2010 4th International Conference on Bioinformatics and Biomedical Engineering, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Ruthenium supported on active carbon-Ceramic Sphere as catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl3 solution impregnation onto these supports, the ruthenium loading was fixed at 3 wt. % of AC in the support. The activity order of catalysts: Ru/ KC-120 > Ru/ KC-80 > Ru/ KC-60 > KC-120 > without catalysts. As optimum catalyst, the Ru/KC-120 catalyst displays the higher stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96% at the reaction temperature of 200°C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h-1 and the oxygen flow rate of 13.5 L h-1.

  • Active carbon-Ceramic Sphere as support of ruthenium catalysts for catalytic wet air oxidation (CWAO) of resin effluent.
    Journal of hazardous materials, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Active carbon-Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere and ruthenium catalysts were characterized by N(2) adsorption and chemisorption measurements. BET surface area and total pore volume of active carbon (AC) in the active carbon-Ceramic Sphere increase with increasing KOH-to-carbon ratio, and AC in the sample KC-120 possesses values as high as 1100 m(2) g(-1) and 0.69 cm(3) g(-1) (carbon percentage: 4.73 wt.%), especially. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl(3) solution impregnation onto these supports, the ruthenium loading was fixed at 1-5 wt.% of AC in the support. The catalytic activity varies according to the following order: Ru/KC-120>Ru/KC-80>Ru/KC-60>KC-120>without catalysts. It is found that the 3 wt.% Ru/KC-120 catalyst displays highest stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96%, respectively at the reaction temperature of 200 degrees C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h(-1) and the oxygen flow rate of 13.5 L h(-1).

  • Active Carbon-Ceramic Sphere as Support of Ruthenium Catalysts: Characterization and Catalytic Wet Air Oxidation (CWAO) of Resin Effluent
    2010 International Conference on Challenges in Environmental Science and Computer Engineering, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Active carbon-Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere and ruthenium catalysts were characterized by N2 adsorption, CO chemisorption and SEM measurements. BET surface area and total pore volume of active carbon(AC) in active carbon-Ceramic Sphere increase with increasing KOH-to-Carbon ratio, AC in the sample KC-120 possesses values as high as 1100 m2 g-1 and 0.69 cm3 g-1(carbon percentage: 4.73 wt. %), especially. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl3 solution impregnation onto KC-120, the ruthenium loading was fixed at 1-5 wt. % of AC in the support. As optimum catalyst, the 3 wt. % Ru/KC-120 catalyst displays the higher stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96% at the reaction temperature of 200°C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h-1 and the oxygen flow rate of 13.5 L h-1.

Yiqiang Hu - One of the best experts on this subject based on the ideXlab platform.

  • active carbon Ceramic Sphere as support of ruthenium catalysts for catalytic wet air oxidation cwao of resin effluent
    Journal of Hazardous Materials, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Abstract Active carbon–Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon–Ceramic Sphere and ruthenium catalysts were characterized by N 2 adsorption and chemisorption measurements. BET surface area and total pore volume of active carbon (AC) in the active carbon–Ceramic Sphere increase with increasing KOH-to-carbon ratio, and AC in the sample KC-120 possesses values as high as 1100 m 2  g −1 and 0.69 cm 3  g −1 (carbon percentage: 4.73 wt.%), especially. Active carbon–Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl 3 solution impregnation onto these supports, the ruthenium loading was fixed at 1–5 wt.% of AC in the support. The catalytic activity varies according to the following order: Ru/KC-120 > Ru/KC-80 > Ru/KC-60 > KC-120 > without catalysts. It is found that the 3 wt.% Ru/KC-120 catalyst displays highest stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96%, respectively at the reaction temperature of 200 °C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h −1 and the oxygen flow rate of 13.5 L h −1 .

  • Ruthenium Supported on Active Carbon-Ceramic Sphere as Catalysts for Catalytic Wet Air Oxidation (CWAO) of Resin Effluent
    2010 4th International Conference on Bioinformatics and Biomedical Engineering, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Ruthenium supported on active carbon-Ceramic Sphere as catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl3 solution impregnation onto these supports, the ruthenium loading was fixed at 3 wt. % of AC in the support. The activity order of catalysts: Ru/ KC-120 > Ru/ KC-80 > Ru/ KC-60 > KC-120 > without catalysts. As optimum catalyst, the Ru/KC-120 catalyst displays the higher stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96% at the reaction temperature of 200°C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h-1 and the oxygen flow rate of 13.5 L h-1.

  • Active carbon-Ceramic Sphere as support of ruthenium catalysts for catalytic wet air oxidation (CWAO) of resin effluent.
    Journal of hazardous materials, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Active carbon-Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere and ruthenium catalysts were characterized by N(2) adsorption and chemisorption measurements. BET surface area and total pore volume of active carbon (AC) in the active carbon-Ceramic Sphere increase with increasing KOH-to-carbon ratio, and AC in the sample KC-120 possesses values as high as 1100 m(2) g(-1) and 0.69 cm(3) g(-1) (carbon percentage: 4.73 wt.%), especially. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl(3) solution impregnation onto these supports, the ruthenium loading was fixed at 1-5 wt.% of AC in the support. The catalytic activity varies according to the following order: Ru/KC-120>Ru/KC-80>Ru/KC-60>KC-120>without catalysts. It is found that the 3 wt.% Ru/KC-120 catalyst displays highest stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96%, respectively at the reaction temperature of 200 degrees C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h(-1) and the oxygen flow rate of 13.5 L h(-1).

  • Active Carbon-Ceramic Sphere as Support of Ruthenium Catalysts: Characterization and Catalytic Wet Air Oxidation (CWAO) of Resin Effluent
    2010 International Conference on Challenges in Environmental Science and Computer Engineering, 2010
    Co-Authors: Yiqiang Hu, Shantung Tu
    Abstract:

    Active carbon-Ceramic Sphere as support of ruthenium catalysts were evaluated through the catalytic wet air oxidation (CWAO) of resin effluent in a packed-bed reactor. Active carbon-Ceramic Sphere and ruthenium catalysts were characterized by N2 adsorption, CO chemisorption and SEM measurements. BET surface area and total pore volume of active carbon(AC) in active carbon-Ceramic Sphere increase with increasing KOH-to-Carbon ratio, AC in the sample KC-120 possesses values as high as 1100 m2 g-1 and 0.69 cm3 g-1(carbon percentage: 4.73 wt. %), especially. Active carbon-Ceramic Sphere supported ruthenium catalysts were prepared using the RuCl3 solution impregnation onto KC-120, the ruthenium loading was fixed at 1-5 wt. % of AC in the support. As optimum catalyst, the 3 wt. % Ru/KC-120 catalyst displays the higher stability in the CWAO of resin effluent during 30 days. Chemical oxygen demand (COD) and phenol removal were about 92% and 96% at the reaction temperature of 200°C, oxygen pressure of 1.5 MPa, the water flow rate of 0.75 L h-1 and the oxygen flow rate of 13.5 L h-1.

David L Wilcox - One of the best experts on this subject based on the ideXlab platform.

  • dielectric mixture model for a hollow Ceramic Sphere composite
    Journal of Applied Physics, 1995
    Co-Authors: David L Wilcox
    Abstract:

    A layered Sphere Bruggeman effective‐medium model was developed to describe the dielectric constant of a porous Ceramic composite having potential for use as a very low dielectric constant inorganic material for microelectronic packaging. The uniqueness of this model is that it incorporates a hollow Sphere geometry and thus fits closely the microstructure of the dielectric composite in a broad range of compositions. Samples of the composite were prepared by adding hollow alumina‐silica alloy Ceramic Spheres to a cordierite matrix. Their dielectric properties were characterized as a function of volume fraction of hollow Spheres. The measured results were in good agreement with the model prediction.

  • Dielectric mixture model for a hollow‐Ceramic‐Sphere composite
    Journal of Applied Physics, 1995
    Co-Authors: David L Wilcox
    Abstract:

    A layered Sphere Bruggeman effective‐medium model was developed to describe the dielectric constant of a porous Ceramic composite having potential for use as a very low dielectric constant inorganic material for microelectronic packaging. The uniqueness of this model is that it incorporates a hollow Sphere geometry and thus fits closely the microstructure of the dielectric composite in a broad range of compositions. Samples of the composite were prepared by adding hollow alumina‐silica alloy Ceramic Spheres to a cordierite matrix. Their dielectric properties were characterized as a function of volume fraction of hollow Spheres. The measured results were in good agreement with the model prediction.

Roland Wimmerstedt - One of the best experts on this subject based on the ideXlab platform.

  • modelling steam drying of a single porous Ceramic Sphere experiments and simulations
    Chemical Engineering Science, 1997
    Co-Authors: Jorgen Hager, Magnus Hermansson, Roland Wimmerstedt
    Abstract:

    In order to investigate and describe the drying kinetics occurring in a porous material during superheated steam drying, a model was developed based on the fundamental transport equations for mass and heat. The driving forces in the model are gradients of moisture, temperature and pressure. The transport coefficients employed were either measured experimentally or were derived theoretically from the pore size distribution of the material. The porous material was viewed as having cylindrical pores that wind according to a tortuosity factor, which was the only adjustable parameter used in the simulations. Local thermodynamic equilibrium was assumed to be present throughout the material. To describe this, an experimental sorption isobar was measured. Single Ceramic Spheres (10 mm diameter), which served as the porous model material, were dried in a thermobalance which enabled weight changes during drying to be determined very accurately. All the experiments were carried out under atmospheric conditions, but both the steam temperature and the steam mass flux were varied within a broad range. Internal temperatures in the Sphere were also measured by use of thin thermocouples (0.5 mm), in order to determine the shape of the internal temperature rise and obtain an indication of the temperature gradient. Good agreement was obtained between results of the experiments and of the simulations, both for the drying rate and for internal temperature under varying external conditions, providing support for the model. The model was also used to study the magnitude and influence of the different transport mechanisms during steam drying. (C) 1997 Elsevier Science Ltd. (Less)

Jorgen Hager - One of the best experts on this subject based on the ideXlab platform.

  • modelling steam drying of a single porous Ceramic Sphere experiments and simulations
    Chemical Engineering Science, 1997
    Co-Authors: Jorgen Hager, Magnus Hermansson, Roland Wimmerstedt
    Abstract:

    In order to investigate and describe the drying kinetics occurring in a porous material during superheated steam drying, a model was developed based on the fundamental transport equations for mass and heat. The driving forces in the model are gradients of moisture, temperature and pressure. The transport coefficients employed were either measured experimentally or were derived theoretically from the pore size distribution of the material. The porous material was viewed as having cylindrical pores that wind according to a tortuosity factor, which was the only adjustable parameter used in the simulations. Local thermodynamic equilibrium was assumed to be present throughout the material. To describe this, an experimental sorption isobar was measured. Single Ceramic Spheres (10 mm diameter), which served as the porous model material, were dried in a thermobalance which enabled weight changes during drying to be determined very accurately. All the experiments were carried out under atmospheric conditions, but both the steam temperature and the steam mass flux were varied within a broad range. Internal temperatures in the Sphere were also measured by use of thin thermocouples (0.5 mm), in order to determine the shape of the internal temperature rise and obtain an indication of the temperature gradient. Good agreement was obtained between results of the experiments and of the simulations, both for the drying rate and for internal temperature under varying external conditions, providing support for the model. The model was also used to study the magnitude and influence of the different transport mechanisms during steam drying. (C) 1997 Elsevier Science Ltd. (Less)