Research to Determine the Effects of Surface Catalycity on Materials Behavior in Dissociated Gas Streams-ATJ-Graphite

Abstract

The reactions of partially dissociated oxygen with heated ATJ graphite surfaces have been investigated at temperatures of 1600-2800K and oxygen atom partial pressures of 0.007 to 0.074 torr. Measurements of total oxygen atom decay as a result of both chemical reaction and catalytic recombination were carried out by the NO-NO2 light intensity method in a fast flow system. Weight change measurements were made to separate the total atom loss results into its two components. Mass spectrometric experiments were carried out over the temperature range 400-1200K to determine product distribution as a function of oxygen molecule dissociation. The rate of net atom loss was found to be linear with time at a given partial pressure, and approximately first order in pressure. The net atom loss rate shows a maximum in the temperature interval investigated, the maximum shifting to higher temperatures with decreasing oxygen atom pressure.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 28, 1970
Accession Number
AD0878331

Entities

People

  • Joan B. Berkowitz-mattuck

Organizations

  • Arthur D. Little

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Facilities
  • Boundary Layer
  • Chemical Reaction Properties
  • Chemical Reactions
  • Dissociation
  • Export Controls
  • Government (Foreign)
  • Governments
  • Heat Transfer
  • Kinetic Theory
  • Kinetics
  • Mass Spectrometers
  • Materials
  • Materials Laboratories
  • Measurement
  • Partial Pressure

Readers

  • Combustion science or combustion engineering.
  • Molecular Photonics/Laser Physics