Fluidized bed heating process and apparatus

Details Fluidized bed heating process and apparatus Fluidized bed heating process and apparatus

C - Chemistry, Metallurgy

01

B

23/326, 23/370,

C01B 33/00 (2006.01) B01J 8/18 (2006.01) C01B 33/02 (2006.01) H05B 6/54 (2006.01) H05B 6/62 (2006.01)

Patent

CA 1153872

Abstract of the Disclosure Capacitive electrical heating of a fluidized bed enables the individual solid particles within the bed to constitute the hottest portion thereof. This effect is achieved by applying an A. C. voltage potential between di- electric coated electrodes, one of which is advantageously the wall of the fluidized bed rejection zone, sufficient to create electrical currents in said particles so as to dissi- pate heat therein. In the decomposition of silane or halo- silanes in a fluidized bed reaction zone, such heating en- hances the desired deposition of silicon product on the surface of the seed particles within the fluidized bed and minimizes undesired coating of silicon on the wall of the reaction zone and the homogeneous formation of fine silicon powder within said zone.

345805

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