Diatomaceous earth and activated bauxite used as granular sorbents for the removal of sodium chloride vapor from hot flue gas
Diatomaceous earth and activated bauxite were tested as granular sorbents for use as filter media in granular-bed filters for the removal of gaseous alkali metal compounds from the hot (800/sup 0/C) flue gas of PFBC. Tests were performed at atmospheric pressure, using NaCl vapor transported in relatively dry simulated flue gas of PFBC. Either a fixed-bed combustor or a high-temperature sorption test rig was used. The effects of sorbent bed temperature, superficial gas velocity, gas hourly space velocity, and NaCl-vapor concentration in flue gas on the sorption behavior of these two sorbents and their ultimate sorption capacities were determined. Both diatomaceous earth and activated bauxite were found to be very effective in removing NaCl vapor from flue gas. Preliminary cost evaluations showed that they are economically attractive as granular sorbents for cleaning alkali vapor from simulated flue gas.
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- Resource Type:
- Technical Report
- Research Org:
- Argonne National Lab., IL (USA)
- Country of Publication:
- United States
- 01 COAL, LIGNITE, AND PEAT; 42 ENGINEERING; ALKALI METAL COMPOUNDS; REMOVAL; BAUXITE; DIATOMACEOUS EARTH; SORPTIVE PROPERTIES; HOT GAS CLEANUP; GRANULAR BED FILTERS; COAL; FLUE GAS; FLUIDIZED-BED COMBUSTION; MEDIUM PRESSURE; ALUMINIUM ORES; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; COMBUSTION; ENERGY SOURCES; FILTERS; FOSSIL FUELS; FUELS; GASEOUS WASTES; MECHANICAL FILTERS; MINERALS; ORES; OXIDATION; PURIFICATION; SURFACE PROPERTIES; THERMOCHEMICAL PROCESSES; WASTES 010800* -- Coal, Lignite, & Peat-- Waste Management; 421000 -- Engineering-- Combustion Systems; 014000 -- Coal, Lignite, & Peat-- Combustion
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