The oxidative degradation of petroleum fractions

Patel, Gordhanbhai Motibhai (1968) The oxidative degradation of petroleum fractions. PhD thesis, University of Glasgow.

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Under weathering conditions bitumen surfacings deteriorate, largely due to oxidation by atmospheric oxygen. The ageing of the exposed surface can be attributed to the effect of photo-oxidation whereas the inner layers are subjected to slow oxidation in the dark, i,e. thermal oxidation. It is known that petroleum bitumens when used as binders in dense road surfacings may produce smooth surfaces of low skid resistance while Trinidad Lake Asphalt is likely to give a rougher texture. This can be attributed to the fact that Trinidad Lake Asphalt is more susceptible to oxidation than petroleum bitumens and, therefore, prone to slight surface abrasion. In view of the importance of skid resistance in modern high-speed motorways, it is of interest to study the difference in behaviour of Trinidad Lake Asphalt and petroleum bitumens during oxidations and a study of the particular components of Trinidad Lake Asphalt responsible for its better performance as a road binder in rolled asphalt, With this purpose the investigation has been designed on the following basis- (1) Bitumen fractionation and characterisation, (2) Thermal oxidation of bitumens and fractions, (3) Photo-oxidation of bitumens and fractions. A.1 - Bitumen fractionation and Characterisation Petroleum bitumens from Middle East, Venezuelan and mixed base crudes and Trinidad Lake Asphalt were first separated into asphaltenes and maltene fractions by precipitating asphaltenes with petroleum spirit (B.P, 30-40

Item Type: Thesis (PhD)
Qualification Level: Doctoral
Additional Information: Adviser: Hugh Gibson
Keywords: Civil engineering
Date of Award: 1968
Depositing User: Enlighten Team
Unique ID: glathesis:1968-72816
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 11 Jun 2019 11:06
Last Modified: 11 Jun 2019 11:06

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