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COMPACT COILED DENUDER FOR ATMOSPHERIC SAMPLING
Citation:
Pui, D., C. Tsai, B. Liu, AND C. Lewis. COMPACT COILED DENUDER FOR ATMOSPHERIC SAMPLING. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/030.
Description:
A compact coiled denuder has been designed and its performance evaluated both theoretically and experimentally. he 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. t 10 slpm the gas collection efficiency for SO2, using a sodium carbonate/glycerine wall coating exceeds 99% and thus is comparable with annular denuder efficiencies. easured losses for particles in the range of 0.02 to 2.5 um diameter averaged well under 5%. he short axial length (6 cm) of the coiled denuder has the advantage that a denuder train of multiple units in series will have a total length which is substantially less than a corresponding train of annular denuders.