Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10273123 | Fuel | 2011 | 4 Pages |
Abstract
The rate constants for the quenching of biacetyl phosphorescence by a series of conjugated dienes were measured. 1,3-cyclohexadiene (kqPÂ =Â 2.94Â ÃÂ 109Â sâ1Â molâ1Â L), 2,5-dimethyl-2,4-hexadiene (kqPÂ =Â 1.91Â ÃÂ 109Â sâ1Â molâ1Â L), 2,4-dimethyl-1,3-pentadiene (kqPÂ =Â 1.78Â ÃÂ 108Â sâ1Â molâ1Â L), 3-methyl-1,3-pentadiene (kqPÂ =Â 1.22Â ÃÂ 108Â sâ1Â molâ1Â L), 2,4-hexadiene (kqPÂ =Â 1.35Â ÃÂ 108Â sâ1Â molâ1Â L) and trans-2-methyl-1,3-pentadiene (kqPÂ =Â 3.84Â ÃÂ 108Â sâ1Â molâ1Â L). Cyclooctene also quenched biacetyl phosphorescence but with a lower rate (kqPÂ =Â 1.97Â ÃÂ 107Â sâ1Â molâ1Â L). Quenching was not observed with 1-methylnaphthalene. Since conjugated dienes quench biacetyl phosphorescence preferentially, this method was studied using gasoline samples with known diene composition. A good correlation was found between the rate of quenching of biacetyl by the gasoline samples and the quantity of conjugated dienes present.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Elanio A. Medeiros, David E. Nicodem, Rodrigo J. Corrêa,