Accession Number:

ADA025917

Title:

Species-Differentiating Continuous Monitor for Airborne Acids.

Descriptive Note:

Quarterly progress rept. Jul-Sep 75,

Corporate Author:

ORION RESEARCH INC CAMBRIDGE MASS

Personal Author(s):

Report Date:

1976-01-01

Pagination or Media Count:

48.0

Abstract:

The sources and levels of airborne nitric and sulfuric acids are briefly reviewed. A theoretical study, based on known vapor pressures and thermodynamic properties, concludes that in normal industrial environments virtually all of the nitric acid will be present as vapor, and that virtually all of the sulfuric acid will be as aerosol droplets. Several new collection techniques for separating the two species are proposed. Of these, the most promising appears to be absorption of acidic gases in a wetted-wall scrubber, followed by impingement collection of the aerosol in an ultrasonically-generated aqueous mist. Preliminary experimental results indicate that wetted wall columns can be constructed which will absorb 99 of the acid gases, and pass 98 of the mist droplets. Author

Subject Categories:

  • Air Pollution and Control

Distribution Statement:

APPROVED FOR PUBLIC RELEASE