Research Projects

Project at a Glance

Project Status: complete

Report Published June 1994:

Title: Development of particle size test methods for sampling high temperature and high moisture source effluents

Principal Investigator / Author(s): McCain, J.D.

Contractor: Southern Research Institute

Contract Number: a132-084

Research Program Area: Emissions Monitoring & Control

Topic Areas: Stationary Sources


In summary, SRI recommends that modifications of the current ARB cascade impactor particle sizing methodology be used for sampling of both high temperature and high moisture gas streams. In each case large drops and/or particles are to be collected in adaptations of the currently used right angle precollector. In the wet stream sampling the remaining droplets are to be dried while passing through a heated inlet tube to the impactor. In the high temperature case the sampled gases are to be cooled to a temperature at which standard impactor hardware can be used by passing the sample through an air cooled tube after the removal of large particles by a special purpose precollector. These modifications of the present method have the advantages that (1) little in the way of additional hardware beyond that presently used will be needed, (2) little additional training of personnel will be required, (3) the data will be obtained on the same gravimetric basis as that being obtained currently and (4) physical samples of the sized particles will be obtained for possible studies of composition and morphology. Prototype hardware for the application of the recommended methods was constructed, tested by actual use, and delivered to the ARB. Detailed procedures were written for the two measurement situations as variants to the existing ARB method for particle sizing, ARB M501 and computer software has been provided for operational set-up and data analysis using IBM compatible PCs.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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