A Monte Carlo discrete A Monte Carlo discrete sum (MCDS) approach to sum (MCDS) approach to energies of formation energies of formation for small methanol for small methanol clusters clusters Srivatsan Raman*, Barbara Srivatsan Raman*, Barbara Hale and Gerald Wilemski Hale and Gerald Wilemski Physics Department, *Chemical Engineering Department University of Missouri-Rolla, Rolla, MO – 65409, USA Supported by the Engineering Physics Program, U.S. DOE
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A Monte Carlo discrete sum (MCDS) approach to energies of formation for small methanol clusters Srivatsan Raman*, Barbara Hale and Gerald Wilemski Physics.
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A Monte Carlo discrete sum A Monte Carlo discrete sum (MCDS) approach to energies (MCDS) approach to energies
of formation for small of formation for small methanol clustersmethanol clusters
Srivatsan Raman*, Barbara Hale and Srivatsan Raman*, Barbara Hale and Gerald WilemskiGerald Wilemski
Physics Department, *Chemical Engineering Department
University of Missouri-Rolla, Rolla, MO – 65409, USA
Supported by the Engineering Physics Program, U.S. DOE
log J CLASSICAL x 10-7(cm-3sec-1)
0 2 4 6 8 10 12 14
log
J E
XP (
cm-3
sec-1
)
0
2
4
6
8
10
12
14 Methanol Nucleation Rates
Strey, Wagner and Schmeling JCP 1986
272 K
255 K 240 K 230 K
Experimental Nucleation rates JEXP vs Classical Theory Predictions JCLASSICAL
MOTIVATION FOR THIS WORK
• Classical Nucleation Model – Poor temperature dependence
• To apply a molecular treatment of small Methanol clusters – Avoid use of bulk surface tension and describe cluster as discrete set of molecules
• To build a foundation for treating binary systems comprising methanol and water