Accession Number:

ADA359201

Title:

Laboratory Studies of the Stratospheric Effects of Rocket Exhaust

Descriptive Note:

Final technical rept. 1 Jan 96-31 Dec 98

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Report Date:

1998-12-01

Pagination or Media Count:

29.0

Abstract:

The most important chlorine activation reaction that takes place in the stratosphere is the heterogeneous reaction of chlorine nitrate with hydrogen chloride to produce molecular chlorine and nitric acid. The reaction is catalytic, promoted by surfaces that are not themselves affected by the reaction. This process was investigated in the laboratory the reaction probability was found to have a value of about 0.02 on glass, on laboratory alumina, and on alumina particles emitted by solid rocket motors. The reaction probability on ice surfaces has a value larger than 0.2 and a negligible value on halocarbon wax or Teflon surfaces. The measurements were carried out under reactant partial pressure, temperature and humidity conditions covering those that are encountered in the mid-latitude lower stratosphere. The reaction mechanism appears do be determined by the water layers adsorbed on the solid surface. Measurements of the amount of water taken up by alumina surfaces were also carried out the results indicate that under stratospheric conditions several water layers will indeed cover the alumina surfaces.

Subject Categories:

  • Atmospheric Physics
  • Inorganic Chemistry
  • Organic Chemistry
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE