The Experts below are selected from a list of 234 Experts worldwide ranked by ideXlab platform

Iwan Wästerlund - One of the best experts on this subject based on the ideXlab platform.

  • effects of raw Material Particle size distribution on the characteristics of scots pine sawdust fuel pellets
    Fuel Processing Technology, 2008
    Co-Authors: Dan Bergström, Samuel Israelsson, Sten Axel Dahlqvist, Marcus Öhman, Ruxandra Gref, Christoffer Boman, Iwan Wästerlund
    Abstract:

    In order to study the influence of raw Material Particle size distribution on the pelletizing process and the physical and thermomechanical characteristics of typical fuel pellets, saw dust of Scot ...

  • Effects of raw Material Particle size distribution on the characteristics of Scots pine sawdust fuel pellets
    Fuel Processing Technology, 2008
    Co-Authors: Dan Bergström, Samuel Israelsson, Sten Axel Dahlqvist, Marcus Öhman, Ruxandra Gref, Christoffer Boman, Iwan Wästerlund
    Abstract:

    In order to study the influence of raw Material Particle size distribution on the pelletizing process and the physical and thermomechanical characteristics of typical fuel pellets, saw dust of Scots pine was used as raw Material for producing pellets in a semi industrial scaled mill (∼ 300 kg h- 1). The raw Materials were screened to a narrow Particle size distribution and mixed into four different batches and then pelletized under controlled conditions. Physical pellet characteristics like compression strength, densities, moisture content, moisture absorption and abrasion resistance were determined. In addition, the thermochemical characteristics, i.e. drying and initial pyrolysis, flaming pyrolysis, char combustion and char yield were determined at different experimental conditions by using a laboratory-scaled furnace. The results indicate that the Particle size distribution had some effect on current consumption and compression strength but no evident effect on single pellet and bulk density, moisture content, moisture absorption during storage and abrasion resistance. Differences in average total conversion time determined for pellet batches tested under the same combustion conditions was less than 5% and not significant. The results are of practical importance suggesting that grinding of saw dust Particle sizes below 8 mm is probably needless when producing softwood pellets. Thus it seem that less energy could be used if only over sized Particles are grinded before pelletizing. © 2008 Elsevier B.V. All rights reserved.

Peter Kleinebudde - One of the best experts on this subject based on the ideXlab platform.

  • roll compaction dry granulation effect of raw Material Particle size on granule and tablet properties
    International Journal of Pharmaceutics, 2007
    Co-Authors: Michael G. Herting, Peter Kleinebudde
    Abstract:

    The influence of Particle size of MCC, as a binder, and theophylline, as an active pharmaceutical ingredient on the process of roll compaction/dry granulation was investigated using a D-optimal design of experiments. Examined parameters were Particle size of both starting Materials, fraction of theophylline and ribbon porosity. Therefore, different binary mixtures were roll compacted, dry granulated and compressed into tablets. Flowability of powders and granules and tensile strength of tablets made from powders or granules were the focus of this study. This study showed that a decrease in Particle size of MCC or theophylline resulted in an increase of tensile strength even after roll compaction/dry granulation. Comparing tensile strength of tablets made from powder using large size MCC with ones made from granules with small sized MCC revealed that the tensile strength of tablets produced from granules was equal or even higher than tensile strength from direct compressed tablets. Furthermore, using small sized MCC instead of large sized MCC led to larger granules with better flowability. It is shown that the fraction of binder can be reduced without a loss of tensile strength of the final tablets by size reduction of MCC.

  • Roll compaction/dry granulation: Effect of raw Material Particle size on granule and tablet properties
    International Journal of Pharmaceutics, 2007
    Co-Authors: Michael G. Herting, Peter Kleinebudde
    Abstract:

    The influence of Particle size of MCC, as a binder, and theophylline, as an active pharmaceutical ingredient on the process of roll compaction/dry granulation was investigated using a D-optimal design of experiments. Examined parameters were Particle size of both starting Materials, fraction of theophylline and ribbon porosity. Therefore, different binary mixtures were roll compacted, dry granulated and compressed into tablets. Flowability of powders and granules and tensile strength of tablets made from powders or granules were the focus of this study. This study showed that a decrease in Particle size of MCC or theophylline resulted in an increase of tensile strength even after roll compaction/dry granulation. Comparing tensile strength of tablets made from powder using large size MCC with ones made from granules with small sized MCC revealed that the tensile strength of tablets produced from granules was equal or even higher than tensile strength from direct compressed tablets. Furthermore, using small sized MCC instead of large sized MCC led to larger granules with better flowability. It is shown that the fraction of binder can be reduced without a loss of tensile strength of the final tablets by size reduction of MCC. ?? 2007 Elsevier B.V. All rights reserved.

Dan Bergström - One of the best experts on this subject based on the ideXlab platform.

  • effects of raw Material Particle size distribution on the characteristics of scots pine sawdust fuel pellets
    Fuel Processing Technology, 2008
    Co-Authors: Dan Bergström, Samuel Israelsson, Sten Axel Dahlqvist, Marcus Öhman, Ruxandra Gref, Christoffer Boman, Iwan Wästerlund
    Abstract:

    In order to study the influence of raw Material Particle size distribution on the pelletizing process and the physical and thermomechanical characteristics of typical fuel pellets, saw dust of Scot ...

  • Effects of raw Material Particle size distribution on the characteristics of Scots pine sawdust fuel pellets
    Fuel Processing Technology, 2008
    Co-Authors: Dan Bergström, Samuel Israelsson, Sten Axel Dahlqvist, Marcus Öhman, Ruxandra Gref, Christoffer Boman, Iwan Wästerlund
    Abstract:

    In order to study the influence of raw Material Particle size distribution on the pelletizing process and the physical and thermomechanical characteristics of typical fuel pellets, saw dust of Scots pine was used as raw Material for producing pellets in a semi industrial scaled mill (∼ 300 kg h- 1). The raw Materials were screened to a narrow Particle size distribution and mixed into four different batches and then pelletized under controlled conditions. Physical pellet characteristics like compression strength, densities, moisture content, moisture absorption and abrasion resistance were determined. In addition, the thermochemical characteristics, i.e. drying and initial pyrolysis, flaming pyrolysis, char combustion and char yield were determined at different experimental conditions by using a laboratory-scaled furnace. The results indicate that the Particle size distribution had some effect on current consumption and compression strength but no evident effect on single pellet and bulk density, moisture content, moisture absorption during storage and abrasion resistance. Differences in average total conversion time determined for pellet batches tested under the same combustion conditions was less than 5% and not significant. The results are of practical importance suggesting that grinding of saw dust Particle sizes below 8 mm is probably needless when producing softwood pellets. Thus it seem that less energy could be used if only over sized Particles are grinded before pelletizing. © 2008 Elsevier B.V. All rights reserved.

Xin Yang - One of the best experts on this subject based on the ideXlab platform.

  • Wavelet based analysis of pressure fluctuation signals measured from a wind cap in bubbling fluidized bed
    2012 IEEE International Conference on Mechatronics and Automation, 2012
    Co-Authors: Huawei Jiang, Hongwei Chen, Yang Wang, Zhenxin Wu, Xin Yang
    Abstract:

    Analysis of pressure fluctuation signals measured from wind caps which was a new method was proposed to realize the condition monitoring of gas-solid flow in fluidized bed. Pressure fluctuation signals measured from a wind cap in a cold bubbling fluidized bed setup at different superficial gas velocities, static bed heights and bed Material Particle sizes, were analyzed with wavelet analysis method. After wavelet analysis, the energy of reconstructed signals at different levels and the ratios of energy at different levels to total energy were calculated. Finally, the influence of operating conditions changes on the characteristic pressure fluctuations of the wind cap in bubbling fluidized bed was analyzed. It is found that the variations of low-frequency reconstructed signals are related with the variations of gas-solid flow state at different operating conditions. So the proposed method in the paper is proved to be practical.

Michael G. Herting - One of the best experts on this subject based on the ideXlab platform.

  • roll compaction dry granulation effect of raw Material Particle size on granule and tablet properties
    International Journal of Pharmaceutics, 2007
    Co-Authors: Michael G. Herting, Peter Kleinebudde
    Abstract:

    The influence of Particle size of MCC, as a binder, and theophylline, as an active pharmaceutical ingredient on the process of roll compaction/dry granulation was investigated using a D-optimal design of experiments. Examined parameters were Particle size of both starting Materials, fraction of theophylline and ribbon porosity. Therefore, different binary mixtures were roll compacted, dry granulated and compressed into tablets. Flowability of powders and granules and tensile strength of tablets made from powders or granules were the focus of this study. This study showed that a decrease in Particle size of MCC or theophylline resulted in an increase of tensile strength even after roll compaction/dry granulation. Comparing tensile strength of tablets made from powder using large size MCC with ones made from granules with small sized MCC revealed that the tensile strength of tablets produced from granules was equal or even higher than tensile strength from direct compressed tablets. Furthermore, using small sized MCC instead of large sized MCC led to larger granules with better flowability. It is shown that the fraction of binder can be reduced without a loss of tensile strength of the final tablets by size reduction of MCC.

  • Roll compaction/dry granulation: Effect of raw Material Particle size on granule and tablet properties
    International Journal of Pharmaceutics, 2007
    Co-Authors: Michael G. Herting, Peter Kleinebudde
    Abstract:

    The influence of Particle size of MCC, as a binder, and theophylline, as an active pharmaceutical ingredient on the process of roll compaction/dry granulation was investigated using a D-optimal design of experiments. Examined parameters were Particle size of both starting Materials, fraction of theophylline and ribbon porosity. Therefore, different binary mixtures were roll compacted, dry granulated and compressed into tablets. Flowability of powders and granules and tensile strength of tablets made from powders or granules were the focus of this study. This study showed that a decrease in Particle size of MCC or theophylline resulted in an increase of tensile strength even after roll compaction/dry granulation. Comparing tensile strength of tablets made from powder using large size MCC with ones made from granules with small sized MCC revealed that the tensile strength of tablets produced from granules was equal or even higher than tensile strength from direct compressed tablets. Furthermore, using small sized MCC instead of large sized MCC led to larger granules with better flowability. It is shown that the fraction of binder can be reduced without a loss of tensile strength of the final tablets by size reduction of MCC. ?? 2007 Elsevier B.V. All rights reserved.