| http://www.w3.org/ns/prov#value | - The bottom head 23 also includes a fluidization nozzle 8, connected at the bottom or apex of the conical section 7, through which a lower fluidization gas line 9 extends upward to provide fluidization gas, such as nitrogen or other diluent, to the catalyst bed 25, and if desired serves as an alternate source for feed injection.
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