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Sunday, August 2, 2020 | History

2 edition of Hydrodynamics of three-phase fluidized beds found in the catalog.

Hydrodynamics of three-phase fluidized beds

J. M. Begovich

Hydrodynamics of three-phase fluidized beds

by J. M. Begovich

  • 19 Want to read
  • 38 Currently reading

Published by Dept. of Energy, [Office of Energy Technology], Oak Ridge National Laboratory, for sale by the National Technical Information Service in Oak Ridge, Tenn, Springfield, Va .
Written in English

    Subjects:
  • Fluidized-bed furnaces.,
  • Hydrodynamics.

  • Edition Notes

    StatementJ. M. Begovich.
    SeriesORNL/TM ; 6448, ORNL/TM -- 6448.
    ContributionsOak Ridge National Laboratory.
    The Physical Object
    Paginationxvii, 291 p. :
    Number of Pages291
    ID Numbers
    Open LibraryOL18014676M

    Hydrodynamics and mass transfer in three-phase magnetic fluidized beds Chia-Min Chen, Lii-Ping Leu) Department of Chemical Engineering, National Taiwan UniÕersity, Taipei , Taiwan Received 1 September ; received in revised form 1 August ; accepted 4 September Abstract. Heat transfer characteristics in three-phase fluidized beds of floating bubble breakers have been studied in a m I.D. x m high Plexiglas column fitted with an axially mounted cylindrical.

    Many fluidized bed operations are physical in nature (e.g. drying, coating, classification, granulation, and rapid heat transfer as in quenching or annealing). Other operations involve chemical reactions including the cata­ lytic cracking of hydrocarbons, the manufacture of acry10nitrite and phthalic anhydride, the roasting of metallurgical. Characteristics of heat transfer and hydrodynamics have been investigated in two- and three-phase inverse fluidized beds whose diameters are and m in height.

    The topics presented cover: fluid particle transfer in packed beds; heat transfer in fixed submerged surfaces in fluidized beds; fundamentals and measurements and applications; heat and mass transfer to suspended objects in fluidized beds; modeling of fluidized bed reactors; fluidized bed combustion and gasification; special fluidized bed processes; liquid and three-phase fluidization; packed bed reactor; and special operations in fluidized beds. Hydrodynamics of three-phase fluidized bed containing cylindrical hydrotreating catalysts. The Canadian Journal of Chemical Engineering , 67 (2), DOI: /cjce


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Hydrodynamics of three-phase fluidized beds by J. M. Begovich Download PDF EPUB FB2

The hydrodynamics of three-phase (gas-liquid-solid) fluidized beds has been studied in two columns with inside diameters of and cm respectively. The minimum gas and liquid velocities necessary to fluidize various types of solids were determined and correlated as a function of the particle.

Get this from a library. Hydrodynamics of three-phase fluidized beds. [J M Begovich; Oak Ridge National Laboratory.]. Experiments were conducted to study the hydrodynamics of a gas‐liquid‐solid fluidized bed containing low‐density particles.

The density and size of the particles employed were comparable to those ordinarily encountered in fluidized‐bed bioreactors for either wastewater Hydrodynamics of three-phase fluidized beds book or by: Show Summary DetailsCited by: 3. Hydrodynamics and Heat Transfer in Fluidized Beds Hardcover – Septem by S.

Zabrodsky (Author) See all formats and editions Hide other formats and editions. Price New from Used from Hardcover "Please retry" $ — $ Author: S. Zabrodsky. Characteristics of heat transfer and hydrodynamics have been investigated in two- and three-phase inverse fluidized beds whose diameters are and m in height.

Effects of gas and liquid velocities and particle density (polyethylene and polypropylene) on the immersed heater-to-bed heat-transfer coefficient, individual phase holdup, and minimum liquid fluidization velocity have been Cited by: These modes include, for example, those for three-phase fluidized beds, slurry columns, turbulent contact absorbers, and three-phase fluidized beds, slurry columns, turbulent contact absorbers, and three-phase transport.

It summarizes the empirical correlations useful for predicting transport properties for each mode of of operation. The local bubble frequency, the local phase holdups and the local bed porosity in three‐phase fluidized beds were measured.

Air, water, and μm glass beads were used as the gas, liquid, and solid phases. The effects of gas and liquid velocities on phase holdups were by: In addition, the three-phase bed volume (V b,GLS) is a function of the three-phase bed height (H b,GLS), which is closely related to the bioparticle washout rate.

The hydrodynamics of AFBs generally vary with changes in the gas, liquid, and solid by: The equations governing fluidized beds system are relatively complex and sometimes unclear. Therefore, the hydrodynamics of gas–solid fluidized beds are usually studied using time series evaluation of the measured signals (Johnsson et al.,Schouten and Van den Bleek, ).Cited by: Hydrodynamics of three‐phase fluidized bed containing cylindrical hydrotreating catalysts Gyung‐Ho Song Department of Chemical Engineering, The Ohio State University, Columbus, Ohio Cited by: The particular characteristics of three-phase fluidized bed reactors have been covered in several recent reviews by Ostergaard [1], Wild [2], Epstein [3], Baker [4] and Muroyama and Fan [5].

Epstein [3] distinguished in particular the difference between three-phase fluidized beds and slurry by: 2. CFD study on hydrodynamics in three-phase fluidized beds—Application of turbulence models and experimental validation. Chemical Engineering Science78, DOI: /ed by: A three phase semifluidized bed is formed when a fraction of fluidized particles by the combined action of a liquid and a gas forms a packed bed below a top restraint in the column.

Hydrodynamics of Circulating Fluidized Beds: Kinetic Theory Approach Hydrodynamics of Circulating Fluidized Beds: Kinetic Theory Approach Author / Creator: Flow Structure in a Two-Dimensional Bubble Column and Three-Phase Fluidized Bed.

Fan, L.-S. / Tzeng, J.-W. / Bi, H. | Title: Dimensional similitude and the hydrodynamics of three-phase fluidized beds: Creator: Safoniuk, Michael: Date Issued: Description: It is proposed that scaling of three-phase fluidized bed hydrodynamics can be carried out based on geometric similarity and matching of a set of five dimensionless groups: (i) the M-group, M=g-Δρ-μ[sub L]⁴/(ρ[sub L]²-σ³); (ii) an Eotvds number.

Experiments were carried out in a laboratory-scale three-phase fluidized bed, with liquid as the continuous phase, with the objective of studying particle size distribution along the bed height. Introduction. Scale-up of fluidized bed reactors and transfer systems is a daunting task for a process engineer.

Information obtained on small, pilot-scale units must be used to design a large, commercial reactor that can be 20 to as much as times as large in diameter as the pilot by: The hydrodynamics of a gas‐liquid‐solid circulating fluidized bed was investigated. A new regime, the three phase circulating fluidization regime, was discovered for the first time.

The characteristics of this regime were compared with that of the conventional fluidization regime and the transport by: Hydrodynamics in a 76 mm i.d., m high circulating fluidized bed (CFB) riser and a 76 mm i.d., m high CFB downer were studied for superficial gas velocities ranging from 2 to 5 m/s and solid circulation rates up to kg/(m 2 s).

Solid holdup, particle velocity and solid flux profiles in the radial and axial positions were by:. This book, originally published in Russian, covers thoroughly the recent work of Soviet authors in this field up to the end of Designed both as a graduate text in two-phase flow and as a reference for the practicing chemical engineer, the text proceeds logically from consideration of basic fluidized bed phenomena to application of various.The objective of the present study was to investigate the hydrodynamics of three-phase fluidized beds, their rheology, and experimentally verify a predictive three fluid hydrodynamic model developed at the Illinois Institute of Technology, Chicago.

The recent thorough reviews by L. S. Fan, B. L. Tarmy and C. A. Coulaloglou () show that there exist no such models in the by: Hydrodynamics of three-phase fluidized bed systems examined by statistical, fractal, chaos and wavelet analysis methods.

Chemical Engineering Science60 (22), DOI: / Y. Zheng, J. Zhu, A. Wushouer. Transition from Low Velocity to High Velocity in a Three Phase Fluidized by: