High-Temperature Scrubbing of Halogenated Compounds

Abstract

The objective of this work was to evalute the performance of sodium compounds in removing halogenated organic and halogenated inorganic species from gas streams. Tests were conducted which evaluated fluidized bed, packed bed, and post-flame injection of sodium compounds as methods for high-temperature scrubbing of halogenated compounds in the form of sodium halides. Methyl chloride destruction at a given temperature was promoted by the presence of sodium carbonate. Kinetic modeling of methyl chloride decomposition supports these experimental results. Laboratory and pilot-scale testing demonstrated effective removal (99−99.9 + %) of halogenated inorganic combustion byproducts using sodium carbonate in packed beds and fluidized beds within reaction times (0.2–3.0 seconds), temperatures (450–1,050° C), and other conditions which are in the practical range for application to waste incineration.