The Experts below are selected from a list of 2370 Experts worldwide ranked by ideXlab platform

Richard Kruse - One of the best experts on this subject based on the ideXlab platform.

  • influence of Coke Particle size on pore structural determination by optical microscopy
    International Journal of Coal Geology, 2013
    Co-Authors: Mhlwazi S Nyathi, Maria Mastalerz, Richard Kruse
    Abstract:

    Abstract Coke produced from a commercial oven was ground into various Particle size ranges as a method to investigate the effect of Coke Particle size on pore structural parameters. The prepared samples were studied using reflected-light optical microscopy coupled with computerized and manual image analyses. Helium density and surface area measurements were performed on the prepared samples. Results showed that the use of smaller Coke Particle sizes for sample preparation leads to a loss of larger pores, thus, leading to an inaccurate description of the Coke pore structure. This was shown by a decrease in volume porosity and average pore area; and an increase in average cell-wall thickness, Coke density, and surface area that accompanied a decrease in the Coke Particle size. Moreover, a decrease in the ratio between pore area and cell-wall thickness, and a decrease in the ratio between pore long and short axial lengths (Feret's ratio) indicated a loss of large and elongated pores as the Coke Particle size decreased. However, a comparison of Coke Particle size ranges of 2.8–4.7 mm and 15–16 mm indicated that a Particle size in a range of 2.8–4.7 mm can be employed without compromising pore structural characteristics, yet still enabling representative sampling.

Weiwei Wang - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Particle size distribution of petroleum Coke on the properties of petroleum Coke-oil slurry
    Fuel, 2011
    Co-Authors: Rui Wang, Weiwei Wang
    Abstract:

    Abstract The effect of Particle size distribution of petroleum Coke on the properties of petroleum Coke–oil slurry (PCOS) from four Chinese petroleum Coke samples, such as apparent viscosity, rheological behavior, static stability, were systematically investigated. The size and morphology of petroleum Coke Particle with different grinding time and the corresponding stabilizing mechanisms were analyzed by SEM and zeta potential measurements. Experiments proved the petroleum Coke grinding time of 60 min is suitable for the Particle distribution and stability of PCOS. Besides, the effect of the sample type and loading of petroleum Coke on the properties of PCOS was studied. The factors governing the apparent viscosity and stability of slurries have been discussed. The experimental results showed that the properties of PCOS could be effectively improved, and a suitable PCOS with low viscosity and good stability could be prepared through controlling the Particle size distribution and petroleum Coke loading.

Mhlwazi S Nyathi - One of the best experts on this subject based on the ideXlab platform.

  • influence of Coke Particle size on pore structural determination by optical microscopy
    International Journal of Coal Geology, 2013
    Co-Authors: Mhlwazi S Nyathi, Maria Mastalerz, Richard Kruse
    Abstract:

    Abstract Coke produced from a commercial oven was ground into various Particle size ranges as a method to investigate the effect of Coke Particle size on pore structural parameters. The prepared samples were studied using reflected-light optical microscopy coupled with computerized and manual image analyses. Helium density and surface area measurements were performed on the prepared samples. Results showed that the use of smaller Coke Particle sizes for sample preparation leads to a loss of larger pores, thus, leading to an inaccurate description of the Coke pore structure. This was shown by a decrease in volume porosity and average pore area; and an increase in average cell-wall thickness, Coke density, and surface area that accompanied a decrease in the Coke Particle size. Moreover, a decrease in the ratio between pore area and cell-wall thickness, and a decrease in the ratio between pore long and short axial lengths (Feret's ratio) indicated a loss of large and elongated pores as the Coke Particle size decreased. However, a comparison of Coke Particle size ranges of 2.8–4.7 mm and 15–16 mm indicated that a Particle size in a range of 2.8–4.7 mm can be employed without compromising pore structural characteristics, yet still enabling representative sampling.

Mario Fafard - One of the best experts on this subject based on the ideXlab platform.

  • influence of Coke Particle characteristics on the compaction properties of carbon paste material
    Powder Technology, 2014
    Co-Authors: Kamran Azari, Houshang Alamdari, Donald Ziegler, Mario Fafard
    Abstract:

    Abstract The anode electrodes in electrolytic production of aluminum are composed of Coke Particles and binder pitch. A paste consisting of the Particles and pitch is made and compacted to form the green anode. The influence of Coke Particle properties including shape factors and density on the Particle packing, compaction behavior of the paste and the final density of green anode was studied. Five sponge Cokes and one shot Coke from different industrial sources were used in this study. The shape factors and apparent density for different size fractions of Particles were measured and the volume fraction of open and closed pores within the Particles was determined. The bulk density of the Particle bed was measured with and without applying vibration. Inter-Particle void fraction was then calculated to determine the packing behavior of the Particles. The pastes were made and compacted to make laboratory-scale anodes. It has been revealed that Particle shape is an important factor determining the packing properties and compacted density.

Rui Wang - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Particle size distribution of petroleum Coke on the properties of petroleum Coke-oil slurry
    Fuel, 2011
    Co-Authors: Rui Wang, Weiwei Wang
    Abstract:

    Abstract The effect of Particle size distribution of petroleum Coke on the properties of petroleum Coke–oil slurry (PCOS) from four Chinese petroleum Coke samples, such as apparent viscosity, rheological behavior, static stability, were systematically investigated. The size and morphology of petroleum Coke Particle with different grinding time and the corresponding stabilizing mechanisms were analyzed by SEM and zeta potential measurements. Experiments proved the petroleum Coke grinding time of 60 min is suitable for the Particle distribution and stability of PCOS. Besides, the effect of the sample type and loading of petroleum Coke on the properties of PCOS was studied. The factors governing the apparent viscosity and stability of slurries have been discussed. The experimental results showed that the properties of PCOS could be effectively improved, and a suitable PCOS with low viscosity and good stability could be prepared through controlling the Particle size distribution and petroleum Coke loading.