In the present study, pseudo-first-order direct photolysis rate constants of 17 PAHs were determined. Basing on the frontier molecular energy, E(homo) and E(lumo), a QSPR equation was obtained. The obtained equation c...
In the present study, pseudo-first-order direct photolysis rate constants of 17 PAHs were determined. Basing on the frontier molecular energy, E(homo) and E(lumo), a QSPR equation was obtained. The obtained equation can be used to predict photolysis rate constants of PAHs under the irradation of medium pressure mercury lamp. As shown in the following equation, the obtained relationship between the logarithm of photolysis rate constants(logk(exp)) and E(lumo)-E(homo) gap was parabolic. logk(exp)=-32.738+9.770(E(lumo)-E(homo))-0.715(E(lumo)-E(homo))(2) n=17, r=0.921, SE=0.322, F=38.911, p=0.0000 Where r is the multiple correlation coefficient, SE is the standard error of estimates for the full regression, F is the F value for analysis of variance, p is the significance level. The obtained parabolic relationship is reasonable when internal and external factors controlling photolysis rate are considered. Copyright (C) 1996 Elsevier Science Ltd.
Heat/mass transfer characteristics of a circular jet impingement in cubical cavity with flat or curved bottom surface are investigated experimentally using naphthalene sublimation technique. The effects of the distanc...
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Heat/mass transfer characteristics of a circular jet impingement in cubical cavity with flat or curved bottom surface are investigated experimentally using naphthalene sublimation technique. The effects of the distance between jet exit and bottom surface (H) and jet Reynolds number are parametrically studied. The jet Reynolds number varied from 7 x 10(3) to 1.1 x 10(5), and the ratio of HID (D-jet delivery nozzle diameter) varied from 0.5 to 4.0. The surface averaged Sherwood numbers for the bottom and lateral walls are correlated with jet exit Reynolds number by a power law equation. In the parameter range tested, the averaged Sherwood number of the bottom surface is always lower than that of the lateral walls.
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