Abstract
The performance of commercially available wire mesh packing was compared to three different ceramic materials in packed bed demisters. Removal efficiencies similar to wire-mesh pads were achieved by certain ceramic packing; however, pressure drops were greater than those associated with commercially available wire mesh demisting pads. Despite higher-pressure drops, ceramic materials have operational advantages at higher temperatures where most metal materials would fail. In particular, ceramic packed beds would be useful with coal-or biomass-fueled slagging combustors, molten salt oxidation of hazardous wastes, molten carbonate fuel cells, and direct contact heat exchange for removing entrained salts and metals from effluent gases. Commercially available ceramic packing of sizes less than 0.75 cm represent a good initial choice for high-temperature demisting: however, further work is needed to optimize both the packing and equipment configuration.
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