Particle & Particle Systems Characterization

Cover image for Particle & Particle Systems Characterization

Special Issue: Special Issue of honor of Professor Brian Scarlett (Part 1).

June, 2007

Volume 24, Issue 1

Pages 3–69

  1. Contents

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
    1. Contents: Part. Part. Syst. Charact. 1/2007 (pages 3–5)

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200790006

  2. Research Articles

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
    1. Brian Scarlett – Myth, Motivator, Mentor, and Man (pages 7–11)

      Reg Davies

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601075

      Few people think of Particle Science and Engineering without thinking of Brian Scarlett who left an indelible mark in this field. His career spanned over 40 years. In this article, the life and accomplishments of this complex man are put into perspective; and, in doing so, we honor him in this special edition of the journal.

    2. On the Consequences of Non-First-Order Breakage Kinetics in Comminution Processes: Absence of Self-Similar Size Spectra (pages 12–17)

      Ecevit Bilgili

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601043

      A common assumption in modeling comminution by population balance models is a first-order kinetics of the breakage rate resulting under certain conditions in self-similar size distributions. This paper presents a theoretical investigation using non-linear theory based on physical reasoning. The value and limits of application of self-similarity plots is discussed extensively.

    3. The Effect of Ultrasound on Crystallisation-Precipitation Processes: Some Examples and a New Segregation Model (pages 18–28)

      John Dodds, Fabienne Espitalier, Olivier Louisnard, Romain Grossier, René David, Myriam Hassoun, Fabien Baillon, Cendrine Gatumel and Nathalie Lyczko

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601046

      This paper discusses the effects of ultrasound on the formation of particles by precipitation and crystallization. It is shown for different materials that ultrasound may reduce the induction time and can lead to finer and more uniform crystals. The reasons for these effects are discussed and a possible mechanism is presented.

    4. Powder Flow Testing with 2D and 3D Biaxial and Triaxial Simulations (pages 29–33)

      Ciprian T. David, Ramon García-Rojo, Hans J. Herrmann and Stefan Luding

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601052

      The mechanical response of frictional powders under quasi-static loading is studied by means of the discrete element method. Particularly, 2D and 3D simulations are compared to each other. It is shown that the critical state flow regime is reached much later in 3D arrangements. Qualitative and quantitative discrepancies and their possible reasons are discussed in detail.

    5. Sampling Errors in Particle Size Analysis? (pages 34–39)

      Henk G. Merkus

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601073

      Sampling errors are highly underestimated in particle size analysis. This manuscript discusses the influence of the statistical error due to the limited sample size and the segregation error. Guidances on the estimation of both types of sampling errors based on the sample size (statistical error) and number of primary samples to be analyzed (segregation error), respectively, are given and discussed extensively.

    6. Application of Seeding as a Process Actuator in a Model Predictive Control Framework for Fed-Batch Crystallization of Ammonium Sulphate (pages 40–48)

      Alex N. Kalbasenka, Lukas C. P. Spierings, Adrie E. M. Huesman and Herman J. M. Kramer

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601053

      Seeding is discussed from the viewpoint of reproducible process actuation. It is shown, that seeding results in significantly improved reproducibility of the resulting crystal size distribution. All mechanisms involved (e.g. dissolution of fines, crystal growth and attrition) are discussed in detail. Furthermore, the influence of the initial supersaturation, the seed load and the seed size on the product quality is investigated.

    7. Coal Fly Ash: From Waste to Industrial Product (pages 49–55)

      Henk W. Nugteren

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601074

      As Al-silicate glass is the main component of coal fly ash it would be very attractive to use it as such instead of using it as an inert filler. However, leaching of mobile components is critical in that case. The opportunities as well as limits of the use of coal fly ash are discussed with a number of examples. Finally, a scheme for developing specifications for new products is given.

    8. Agglomerate TiO2 Aerosol Dynamics at High Concentrations (pages 56–65)

      Martin C. Heine and Sotiris E. Pratsinis

      Article first published online: 29 MAY 2007 | DOI: 10.1002/ppsc.200601076

      Primary and agglomerate particle dynamics are investigated for aerosol synthesis of titania at conditions typical for industrial scale production. Simulations for primary and hard agglomerate sizes are performed accounting for chemical reaction, coagulation and sintering. Also the extent of soft agglomerate formation is described and the related consequences are discussed.

  3. Calendar

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors
  4. Instructions for Authors

    1. Top of page
    2. Contents
    3. Research Articles
    4. Calendar
    5. Instructions for Authors

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