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Heterogeneous nucleation of organic vapours on a cold substrate
Author(s) -
Shinagawa Hideo,
Okuyama Kikuo,
Kawamura Yuji
Publication year - 1993
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450710210
Subject(s) - vapours , supersaturation , nucleation , cyclohexane , vapor pressure , substrate (aquarium) , chemistry , chemical engineering , materials science , thermodynamics , chemical physics , organic chemistry , physics , neuroscience , biology , oceanography , engineering , geology
The heterogeneous phase transition of the organic vapours, cyclohexane and p‐xylene, on a cold substrate was observed by cooling the substrate at a slow rate under reduced pressure conditions. Either organic vapour at a vapour pressure lower than 130 Pa formed directly solid crystals but p‐xylene vapour at a higher vapour pressure formed liquid condensates with subsequent formation of solid crystals. The dependence of the critical supersaturation ratios on the critical temperatures and the physical properties of the organic vapours has been clarified by the equation derived on the basis of classical nucleation theory.