Coagulation of Carbon Particles in Premixed Flames.
Abstract
The size distribution, number concentration, and fraction charged of carbon particles at successive stages of formation in a low pressure flat flame were measured using molecular beam sampling involving electrical beam deflection and electron microscopy of beam deposits and an optical absorption technique. Observed cluster-type structure within roughly sperical particles and decreasing particle number concentration following rapid nucleation indicate the particles do indeed coagulate during growth. Particle size and number concentration data confirm this conclusion although the experimental coagulation rate exceeds by a factor of about 10 the kinetic energy collision rate approximately adjusted for elastrostatic forces, based upon the measured extent of particle charging, and Van der Walls attraction. Calculations based upon extrapolation of the experimental coagulation rate constant into the flame region of significant particle nucleation and surface reaction are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1972
- Accession Number
- AD0755693
Entities
People
- B. L. Wersborg
- G. C. Williams
- J. B. Howard
Organizations
- Purdue University