- Author
- Washabaugh, P. | Sherman, P. M.
- Title
- Mechanism for the Formation of Submicron Particles From Pulverized Coal Combustion.
- Coporate
- Michigan Univ., Ann Arbor
- Report
- WSS/CI 83-11
- Book or Conf
- Combustion Institute/Western States Section. Spring Meeting, 1983. April 11-12, 1983, Pasadena, CA, 24 p., 1983
- Keywords
- coal
- Abstract
- An evaporation-condensation model was used to determine trends in the generation of submicron particles from the combustion of pulverized coal as a function of combustion and heat transfer parameters. The classical liquid drop theory for homogenous nucleation was used with simplifying assumptions to calculate submicron size distribution of flyash. Rates of heat trnsfer between 100 deg K/s and 17,000 deg K/s with peak temperatures between 1400 deg K and 2300 deg K with and without heterogeneous condensation on entrained particles were considered. Trends show that high cooling rates, moderate peak temperatures, and low surface area of entrained particles all tend to decrease the size of particles formed by homogeneous nucleation and increase their number. The results are consistent with the limited experimental data presented.