A compact coiled denuder for atmospheric sampling

A compact coiled denuder for atmospheric sampling

A compact coiled denuder has been designed and its performance evaluated both theoretically and experimentally. The design is based on special features of laminar flow in a curved tube, which significantly enhance the mass-transfer Sherwood number governing gas collection at the wall. At 10 standard...

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Veröffentlicht in:Environmental science & technology 1990-03, Vol.24 (3), p.307-312
Hauptverfasser: Pui, David Y. H, Lewis, Charles W, Tsai, Chuen Jinn, Liu, Benjamin Y. H
Format: Artikel
Sprache:eng
Schlagworte:
01 COAL, LIGNITE, AND PEAT
010900 - Coal, Lignite, & Peat- Environmental Aspects
540120 - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-)
AIR POLLUTION MONITORS
AIR SAMPLERS
ALKALI METAL COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
DESIGN
ENVIRONMENTAL SCIENCES
GAS ANALYSIS
MEASURING INSTRUMENTS
MONITORS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
SAMPLERS
SODIUM CARBONATES
SODIUM COMPOUNDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
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Beschreibung
Zusammenfassung:A compact coiled denuder has been designed and its performance evaluated both theoretically and experimentally. The design is based on special features of laminar flow in a curved tube, which significantly enhance the mass-transfer Sherwood number governing gas collection at the wall. At 10 standard L/min (slpm) the gas collection efficiency for SO sub(2), using a sodium carbonate/glycerine wall coating, was measured to be 99.3 plus or minus 0.5%, while losses for particles in the range of 0.02-2.5- mu m diameter averaged well under 5%.
ISSN:0013-936X
1520-5851
DOI:10.1021/es00073a003