Thermodynamic and thermokinetic processes of formation disperse structures of bitumen. (17th December 2017)

• Record Type: Journal Article
• Authors: Frolov, I. N.; Okhotnikova, E. S.; Ziganshin, M. A.; Firsin, A. A.
• Is Part Of: Petroleum science and technology. Volume 35:Number 24(2017)
• Page Start: 2277
• Page End: 2282
• Publication Date: 2017-12-17
• Subjects: bitumen -- temperature-modulated DSC -- dispersed system -- phase and relaxation transitions; Liquid fuels -- Periodicals; Petroleum -- Periodicals; 665.505
• DOI: 10.1080/10916466.2017.1402032
• Languages: English
• ISSNs: 1091-6466

Abstract

ABSTRACT: The present experiment analyzes structural and thermal properties of bitumen carried out by temperature-modulated differential scanning calorimetry. It is shown that the bitumen in specific time-temperature conditions is a dispersed system of variable composition and structure. The dispersed phase can be represented by two types of domains. Paraffinic hydrocarbons form aggregative solid, structural crystalline phase at thermodynamic laws of structural phase transitions and nucleation thermodynamic mechanism of phase separation. The asphaltenes form for a relatively long time, an aggregative solid is structurally amorphous phase, as a result of thermokinetic structural relaxation glass transition by spinodal thermodynamic phase separation mechanism.