Fluidization aid for cohesive materials
AssigneeTRW Inc.
InventorEdward F. Brooks
Life of this patent
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Abstract
Tendrillar carbonaceous material is used as a fluidization aid for fluidizing cohesive materials in fluidized beds. The tendrillar carbonaceous material can be a fibrous, particulate carbonaceous material comprising carbon fibers and a ferrous group metal component dispersed throughout the carbon fibers as nodules. The tendrillar carbonaceous material has a bulk density of from about 0.04 to about 0.7 g/cm.sup.3 and comprises an agglomeration of tendrils having a diameter of from about 0.01 to about 1 micron and a length to diameter ratio of from about 5:1 to about 1000:1.
Claims17
A method for fluidizing a cohesive material in a mixed fluidized bed, the cohesive material having a mean particle size of from about 0.1 to about 120 microns and a particle density of from 0.1 to 4 g/cm.sup.3, the method comprising the steps of:
- (a) combining the cohesive material with tendrillar carbonaceous material in a mass ratio of tendrillar carbonaceous material to cohesive material of from about 1:9 to about 4:1, the tendrillar carbonaceous material having a bulk density of from about 0.04 to about 0.7 g/cm.sup.3 and comprising an agglomeration of tendrils having a diameter of from about 0.01 to about 1 micron and a length to diameter ratio of from about 5:1 to about 1000:1;
- and
- (b) passing a fluidizing gas through the combined cohesive material and tendrillar carbonaceous material at a sufficient velocity to fluidize the cohesive material and the tendrillar carbonaceous material.
A composition suitable for fluidization in a mixed fluidized bed comprising:
- (a) a cohesive material having a mean particle size of from 0.1 to 120 microns and a particle density of from 0.1 to 4 g/cm.sup.3 ;
- and
- (b) tendrillar carbonaceous material having a bulk density of from about 0.04 to about 0.7 g/cm.sup.3 and comprising an agglomeration of tendrils having a diameter of from about 0.01 to about 1 micron and a length to diameter ratio of from about 5:1 to about 1000:1.
Dependencies are inferred from the claim text.