Elsevier

Powder Technology

Volume 7, Issue 5, May 1973, Pages 285-292
Powder Technology

Types of gas fluidization

https://doi.org/10.1016/0032-5910(73)80037-3Get rights and content

Abstract

The behaviour of solids fluidized by gases falls into four clearly recognizable groups, characterized by density difference (ϱs–ϱf) and mean particle size. The most easily recognizable features of the groups are: powders in group A exhibit dense phase expansion after minimum fluidization and prior to the commenment of bubbling; those in group B bubble at the minimum fluidization velocity; those in group C are difficult to fluidize at all and those in group D can form stable spouted beds. A numerical criterion which distinguishes between groups A and B has been devised and agrees well with published data. Generalizations concerning powders within a group can be made with reasonable confidence but conclusions drawn from observations made on a powder in one group should not in general be used to predict the behaviour of a powder in another group.

References (38)

  • D. Geldart

    Powder Technol.

    (1972)
  • H.C. Simpson et al.

    Chem. Eng. Sci.

    (1961)
  • J. Verloop et al.

    Chem. Eng. Sci.

    (1970)
  • K. Godard et al.

    Chem. Eng. Sci.

    (1969)
  • J.H. de Groot
  • P.N. Rowe et al.

    Chem. Eng. Sci.

    (1964)
  • D. Geldart et al.

    Chem. Eng. J.

    (1972)
  • R.H. Wilhelm et al.

    Chem. Eng. Progr.

    (1948)
  • J.B. Romero et al.

    Chem. Eng. Progr. Symp. Ser.

    (1962)
  • F.A. Zenz

    Petrol. Refiner

    (1957)
  • R. Jackson

    Trans. Inst. Chem. Engrs.

    (1963)
  • O. Molerus
  • R.L. Pigford et al.

    Ind. Eng. Chem. Fundamentals

    (1965)
  • D. Harrison et al.

    Trans. Inst. Chem. Engrs.

    (1961)
  • L. Davies et al.

    Trans. Inst. Chem. Engrs.

    (1966)
  • R. Diekman et al.

    Ind. Eng. Chem.

    (1953)
  • R.D. Oltrogge

    Internal Memo, Tech. Hoge. Eindhoven

    (1969)
  • D. Geldart et al.
  • R.D. Oltrogge

    Internal Memo, Tech. Hoge. Eindhoven

    (1970)
  • Cited by (3035)

    View all citing articles on Scopus
    View full text