TY - JOUR
T1 - On the gasification of droplets of azeotropic mixtures
T2 - Theory and experiment
AU - Kim, J. S.
AU - Lee, A.
AU - Law, C. K.
N1 - Funding Information:
We wish to acknowledge Dr. Phillip Felton of Princeton University for suggesting this investigation. This work was supported by the U.S. National Science Foundation and the Office of Naval Research.
Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 1991
Y1 - 1991
N2 - Recognizing the potential formation of azeotropic mixtures from blending hazardous chemical wastes for incineration, a fundamental experimental and theoretical investigation of the volatility reversal and gasification characteristics of droplets of azeotropic and zeotropic mixtures has been conducted. Experimental results on the temporal variation of the droplet composition of binary positive azeotropic mixtures show that while the low-boiling-point component indeed gasifies faster throughout the droplet lifetime for low initial concentrations, it becomes the slower gasifying component at high initial concentrations. Consequently there exists an intermediate, azeotropic point such that a droplet at this initial composition will remain so throughout its lifetime. This gasification azeotropic point is different from the thermodynamic azeotropic point and is determined by the specific droplet combustion parameters. Corresponding control experiments on zeotropic mixtures show that the more volatile component remains as the faster gasifying component for all initial concentrations. Theoretical calculations on binary mixture droplets completely substantiate the experimental observations. The behavior of the azeotrope with the addition of a third component of greater or lesser volatility has also been examined. Experiments on some ternary mixtures show that the azeotropic behavior can be broken, for additions of either volatility.
AB - Recognizing the potential formation of azeotropic mixtures from blending hazardous chemical wastes for incineration, a fundamental experimental and theoretical investigation of the volatility reversal and gasification characteristics of droplets of azeotropic and zeotropic mixtures has been conducted. Experimental results on the temporal variation of the droplet composition of binary positive azeotropic mixtures show that while the low-boiling-point component indeed gasifies faster throughout the droplet lifetime for low initial concentrations, it becomes the slower gasifying component at high initial concentrations. Consequently there exists an intermediate, azeotropic point such that a droplet at this initial composition will remain so throughout its lifetime. This gasification azeotropic point is different from the thermodynamic azeotropic point and is determined by the specific droplet combustion parameters. Corresponding control experiments on zeotropic mixtures show that the more volatile component remains as the faster gasifying component for all initial concentrations. Theoretical calculations on binary mixture droplets completely substantiate the experimental observations. The behavior of the azeotrope with the addition of a third component of greater or lesser volatility has also been examined. Experiments on some ternary mixtures show that the azeotropic behavior can be broken, for additions of either volatility.
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U2 - 10.1016/S0082-0784(06)80409-1
DO - 10.1016/S0082-0784(06)80409-1
M3 - Article
AN - SCOPUS:58149207059
VL - 23
SP - 1423
EP - 1429
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
SN - 1540-7489
IS - 1
ER -