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U.S. Department of Energy
Office of Scientific and Technical Information

Direct sampling and characterization of gaseous species responsible for fireside corrosion in fossil fuel-fired systems. Third quarterly progress report, October 1--December 31, 1976

Technical Report ·
DOI:https://doi.org/10.2172/7220460· OSTI ID:7220460
The direct, high-capacity, free jet, molecular beam sampling system, designed and constructed for this program, has been tested for performance and sensitivity. These tests involve both one atmosphere permanent gases and CH/sub 4/-air flames with and without the addition of fine KHCO/sub 3/ powder. Sampling one atmosphere argon through the 0.020 in. conical flame sampling orifice resulted in the expected amount of Ar/sub 2/ for an isentropic, shock-free expansion. Tests with air and CH/sub 4/-air flames showed complicating phenomena and troublesome interferences to be expected in coal-air flame sampling. Tests with KHCO/sub 3/ added to the CH/sub 4/-air flame revealed random noise spikes caused by impact of the particulate matter somewhere in the quadrupole mass spectrometer. Even with such interference, K/sup +/ could be detected at the 10 ppM of neutral species level, indicating that we should proceed directly to a search for such species in coal-air flames.
Research Organization:
Midwest Research Inst., Kansas City, MO (USA)
OSTI ID:
7220460
Report Number(s):
FE-2288-12
Country of Publication:
United States
Language:
English