High altitude pollution program stratospheric measurement system laboratory performance capability report chemical conversion techniques. Technical report, January 1978-June 1979

Technical Report · Fri Feb 01 04:00:00 EST 1980

OSTI ID:7065945

Macoy, N H; Weingarten, R; Pires, A; Poultney, S K

This report documents the laboratory measurements made to resolve specificity questions concerning the chemical conversion techniques for measurement of stratospheric trace species NO2, N2O5, and HNO3 to NO (Which is the measurable species). Particular emphasis was placed on the conversion of NO2 to NO by both catalytic and photolytic converters, thermal conversion of N2O5 and HNO3 to N02 with and without possible interfering gases, and the feasibility of measuring total odd-nitrogen concentration using catalytic thermal conversion to NO. The laboratory measurements were generally carried out at ppm concentrations at STP conditions. The GEARS/EPISODE computer code was used to model both the laboratory reactions and the behavior of the technique at stratospheric conditions. The laboratory measurement and stratospheric simulations lead to the recommendation to develop a flight prototype of a Hybrid Gas Conversion System consisting of a number of instrumentation modules. The first module would be a Total Odd-Nitrogen module (and NO) based on high temperature catalytic conversion of the odd-nitrogens and chemiluminescent detection of NO. The second module would be an NO2/NO module based on NO2 photolysis and NO chemiluminescent detection. Other modules could consist of an O3 UV photometer, and N2O gas chromatograph, and other appropriate modules that are ready at flight time.

• Research Organization: Perkin-Elmer Corp., Norwalk, CT (USA). Electro-Optical Div.
• OSTI ID: 7065945
• Report Number(s): AD-A-085198
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
500100 -- Environment
Atmospheric-- Basic Studies-- (-1989)
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ALTITUDE
ATMOSPHERIC CHEMISTRY
BENCH-SCALE EXPERIMENTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CONVERSION
CRACKING
DECOMPOSITION
EARTH ATMOSPHERE
ENERGY
ENERGY CONVERSION
FLUIDS
GASES
HEAT
ISOTOPE APPLICATIONS
MEASURING INSTRUMENTS
MEASURING METHODS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOMETERS
POLLUTION
PYROLYSIS
STRATOSPHERE
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES