TITLE: Cold-Flow-Model Study of Reactor Fluid Dynamics, Task III.

INST.  AUTHOR: Hydrocarbon Research, Inc., Lawrenceville, NJ.

SPONSOR: Department of Energy, Washington, DC.

LANGUAGE: English

PUB.  TYPE: Technical Report

PUB.  COUNTRY: United States

SOURCE: Department of Energy [DE],  Nov 82,  82p.

NTIS REPORT NO.:DE83001835

ABSTRACT:

Fluidization and elutriation characteristics of spent extrudate catalyst were investigated. Six systems involving liquids of different viscosities and various slurries were studied using a 6 in.-dia., cold-flow model. The bed expansions predicted from the cold-flow and PDU data were within 15% of the bed expansion measured in the Pilot Plant reactor. The catalyst elutriation rates measured were small at typical H-Coal reactor flow conditions. Higher carryover rates were measured at spouting-bed conditions (high gas and low liquid velocity). A cold-flow simulation of Pilot Plant reactor plenum performance using the 5-ft.-dia. reactor model showed that the initial inlet nozzle used in the Pilot Plant reactor resulted in flow maldistribution, probably causing coke formation. A new inlet nozzle showed marked improvement in flow uniformity. These cold-flow test results were consistent with Pilot Plant data obtained with a new inlet nozzle in Run No. 8, a 131-day operation on Illinois coal.  Ebullation tests on two spherical catalyst samples with different size distributions showed that the sample with a narrow size distribution gave uniform fluidization and negligible carryover, while the performance of the sample with a wide size distribution was unacceptable. (ERA citation 08:003920)

REPORT  NUMBER: DOE/ET/10152-T13

CONTRACT  NUMBER: AC05-77ET10152