Open AccessINFLUENCE OF INHIBITORS ON THE BASIS OF DERIVATIVES OF PHOSPHIT TO CHEMILUMINESCENCE AT PHOTO AND THERMOOXIDATION OF DIESEL FUEL
Author(s) -
A.P. Mammadov,
Ch. K. Rasulov,
Ch.Q. Salmanova,
Saida F. Ahmadbayova,
N.V. Nagiyeva,
N.R. Dadashova
Publication year - 1970
Publication title -
izvestiâ vysših učebnyh zavedenij. himiâ i himičeskaâ tehnologiâ/izvestiâ vysših učebnyh zavedenij. seriâ himiâ i himičeskaâ tehnologiâ
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.221
H-Index - 5
eISSN - 2500-3070
pISSN - 0579-2991
DOI - 10.6060/ivkkt201962fp.5787
Subject(s) - chemistry , radical , photochemistry , chemiluminescence , intramolecular force , quenching (fluorescence) , diesel fuel , organic chemistry , fluorescence , physics , quantum mechanics
It has been carried out thermo-and photothermal oxidation of diesel fuel by thermochemiluminescence and photothermochemiluminescence with participation of phosphite-based inhibitors with various substituents. The influence of the peculiarities of the structure of inhibitors on the efficiency and degree of quenching of chemiluminescence in the temperature range of 20-220 °C before and after exposure to the photo irradiation using a light filter simulating solar radiation is considered. The main components of diesel fuel with a temperature boiling of 180-360 °C are naphthenic-paraffinic and alkylaromatic hydrocarbons. It has been established that photochemical reactions in diesel fuel take place according to the molecular and radical mechanisms, respectively, in one- and two-photon methods of light absorption. The single-quantum process occurs in aromatic rings with the formation of endoperoxides. The two-quantum process proceeds as a result of intramolecular energy transfer from aromatic rings to alkyl substituents in which alkylaromatic radicals are generated by hydrogen atoms. The latter, because of their high reactivity, do not stabilize and contribute to the continuation of the chain reaction with the formation of radicals (Н+R-АУВ®H2+R·-АУВ). The change in the valence of phosphorus in inhibitors during their interaction with peroxide radicals formed in naphthene-paraffinic and alkylaromatic hydrocarbons is discussed. The minimum and maximum amounts of these radicals reacting with molecules containing fragments with weakly bound C-H bonds and unpaired electrons C • -O •, formed during photo-irradiation of the inhibitor, are considered.