Negative Viscosity Anomaly of Liquid Petroleum Products after Heat Treatment
- Cite this article as:
- Evdokimov, I.N., Eliseev, D.Y. & Eliseev, N.Y. Chemistry and Technology of Fuels and Oils (2002) 38: 171. doi:10.1023/A:1016208518778
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Heat treatment is a common method of improving the properties of heavy crude oils and petroleum products. Measurements showed for the first time that after heat treatment at 28—40°C, the rheological parameters of petroleum systems become much worse. The results obtained are important for improving shipping and storage technologies in conditions of periodic temperature drops. A theoretical explanation of these effects is given with consideration of the phase diagrams of petroleum systems and thermally induced changes in their colloidal structure.