On the controlling mechanisms in multicomponent droplet gasification

H. Q. Zhang, C. K. Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The relative roles of liquid-phase mass diffusional resistance and volatility differential in multicomponent droplet gasification is re-visited, recognizing that the liquid-phase mass diffusivities can be substantially increased as the droplet is progressively heated upon initiation of gasification. Such an increase could substantially weaken the diffusional resistance, hence rendering volatility differential having an increased influence on the gasification sequence. Calculations performed by using realistic and temperature-dependent thermal and mass diffusivities indeed substantiate this influence. In particular, the calculated results agree with the literature experimental data. Further computation was performed for gasification at elevated pressures, recognizing that the liquid boiling point and hence the attainable droplet temperature would increase with increasing pressure, leading to further weakening of the liquid-phase diffusional resistance and hence increased influence of volatility differentials. This possibility was again verified through calculated results, suggesting that volatility differentials could have a stronger influence on multicomponent droplet gasification at high pressures.

Original languageEnglish (US)
Title of host publication5th US Combustion Meeting 2007
PublisherCombustion Institute
Pages2921-2931
Number of pages11
ISBN (Electronic)9781604238112
StatePublished - Jan 1 2007
Event5th US Combustion Meeting 2007 - San Diego, United States
Duration: Mar 25 2007Mar 28 2007

Publication series

Name5th US Combustion Meeting 2007
Volume5

Other

Other5th US Combustion Meeting 2007
CountryUnited States
CitySan Diego
Period3/25/073/28/07

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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  • Cite this

    Zhang, H. Q., & Law, C. K. (2007). On the controlling mechanisms in multicomponent droplet gasification. In 5th US Combustion Meeting 2007 (pp. 2921-2931). (5th US Combustion Meeting 2007; Vol. 5). Combustion Institute.