The effect of weathering on charcoal filter performance. 2; The effect of contaminants on the CH sub 3 I removal efficiency of TEDA charcoal

Journal Article · Wed May 01 04:00:00 EDT 1991 · Nuclear Technology; (United States)

OSTI ID:5133049

Wren, J C; Moore, C J ^[1]

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1. Atomic Energy of Canada Ltd. Research Co., Whiteshell Nuclear Research Establishment, Research Chemistry Branch Pinawa, Manitob, R0E 1L0 (CA)

The effect of various contaminants, namely NO{sub 2} SO{sub 2}, 2-butanone (methyl-ethyl-ketone (MEK)), and NH{sub 3}, on the radioiodine removal efficiency of triethylenediamine (TEDA)-impregnated charcoal filters has been studied, and an attempt was made to characterize and quantify the weathering process of TEDA charcoal by these contaminants. The effects of the contaminants on the CH{sub 3}I removal efficiency of TEDA charcoal under dry and humid conditions are described. Based on our results, the efficiency of TEDA charcoal is degraded most by NO{sub 2} and SO{sub 2}, NH{sub 3} has a negligible effect, and MEK produces a mild degradation. The degree of degradation parallels the contaminant's ability to be chemisorbed on the TEDA impregnant. The combined effect of water vapor and a contaminant of the charcoal efficiency is different for each contaminant. Nitrogen dioxide absorbed under dry conditions is more effective in degrading the CH{sub 2}I removal efficiency of the charcoal that when absorbed under humid conditions. On the other hand, a completely opposite result is observed for SO{sub 2}. The MEK contaminant behaves similarly to SO{sub 2} but the effect of humidity was less significant than for SO{sub 2}. Ammonia has no effect on the efficiency of the charcoal regardless of humidity.

• OSTI ID: 5133049
• Journal Information: Nuclear Technology; (United States), Journal Name: Nuclear Technology; (United States) Vol. 94:2; ISSN NUTYB; ISSN 0029-5450
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200 -- Nuclear Reactor Technology-- Components & Accessories
220900* -- Nuclear Reactor Technology-- Reactor Safety
ADSORBENTS
AMINES
AMMONIA
CHALCOGENIDES
CHARCOAL
FILTERS
FILTRATION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDRIDES
HYDROGEN COMPOUNDS
IMPURITIES
IODINATED ALIPHATIC HYDROCARBONS
IODINE ISOTOPES
ISOTOPES
KETONES
METHYL IODIDE
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN HYDRIDES
NITROGEN OXIDES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC IODINE COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POWER REACTORS
REACTOR SAFETY
REACTORS
REMOVAL
SAFETY
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WEATHERING