TY - GEN
T1 - On the controlling mechanisms in multicomponent droplet gasification
AU - Zhang, H. Q.
AU - Law, C. K.
PY - 2007
Y1 - 2007
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84885282178
T3 - 5th US Combustion Meeting 2007
SP - 2921
EP - 2931
BT - 5th US Combustion Meeting 2007
PB - Combustion Institute
T2 - 5th US Combustion Meeting 2007
Y2 - 25 March 2007 through 28 March 2007
ER -