Abstract

Researchers at Allentown Laboratories have been studying the hydrodynamic flow within a large-scale column, 6 ft in diameter by 25 ft tall with a 1-ft-diameter inlet, to simulate two-phase (air/water) and three-phase (air/water/solids) mass transfer and solids removal in the coal dissolver for the SRC-I Demonstration Plant. Evidence from experiments at the Wilsonville Pilot Plant and predictions developed from cold-flow-derived correlations suggest that hydrogen consumption will not be controlled by the rate of gas/liquid mass transfer. Studies began on gas/liquid contact during batch and continuous liquid flow after all project-related equipment had been fabricated and installed. The piping layout design simulates the interstage from the first dissolver to the second dissolver in series. Transparent transfer lines were installed in order to observe the patterns of gas/slurry flow. ICRC researchers also completed studies of the dissolver design without internal parts. Researchers filmed batch and continuous flow in the contact vessel to accurately record the full range of flow conditions during each mode of operation. Results indicate that vessel performance depends upon the size of inlet diameter. 2 references, 5 figures.

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