Home Books eBooks Journals References & Proceedings Authors, Editors, Reviewers A-Z Product Index Awards
Progress in Plasma Processing of Materials, 1997

ISBN:
1-56700-093-2 (Print)

HYDRODYNAMIC STUDY OF TWO PHASE MIXING: SIMULTANEOUS MEASUREMENTS OF PARTICLES LOCAL DENSITY AND VELOCITY IN ZEOLITE SPOUTED-BED

M. Mohammedi
Laboratoire de Genie des Procedes Plasmas ENSCP/UPMC, 11 rue P, & M. Curie 75231 Paris cedex 05 - France

E. Francke
Laboratoire de Génie Procédés Plasmas et Traitement de Surface, Université Pierre et Mane Curie- ENSCP 11-13, rue Pierre et Marie Curie 75231 Paris Cedex 05 France

Jacques Amouroux
Laboratoire de Genie des Precedes Plasmas Universite P. et M. Curie, ENSCP 11 rue P. et M. Curie 75005 Paris France

Abstract

The aim of this work is to improve investigations and understanding of the reactivity phenomena which occur in:
- the hydrocracking of heavy hydrocarbons, as well as in:
- the destruction of wastes,
especially during a high pressure plasma process, coupled with a fluidized bed treatment. In such a plasma spouted-bed reactor process, the action of thermal plasma treatment on solid particles dragged by the fluidization gas, enhances the reactivity either by increasing the radical H° flow or by increasing the quenching insuring the trapping of toxic molecules.
Different representations and images have been elaborated such as the mapping of the velocity and density fields inside the fluidized bed by 3D Mesh Cartesian representations, CCD instantaneous image shoot and real time numerization to observe discontinuous phenomena. The hydrodynamic study of solid particles mixing and the fluidization gas provided accurate values of the particles velocity, and evidenced that the efficiency of the process is limited by specific contributions of alumina and zeolite particles to the plasma reactivity.