A Compact Coiled Denuder for Atmospheric Sampling

David Y.H. Pul*, Charles W. Lewis, Chuen-Tinn Tsai, Benjamin Y.H. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


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 SO2, using a sodium carbonate/glycerine wall coating, was measured to be 99.3 ± 0.5%, while losses for particles in the range of 0.02–2.5-μm diameter averaged well under 5%.

Original languageEnglish
Pages (from-to)307-312
Number of pages6
JournalEnvironmental Science and Technology
Issue number3
StatePublished - 1 Mar 1990


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