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Proceedings of an International Conference on Mitigation of Heat Exchanger Fouling and Its Economic and Environmental Implications

ISSN:
1-56700-172-6 (Print)

EFFECTS OF RESINS/ASPHALTENES RATIO ON HEAT EXCHANGER FOULING OF MIXTURES CONTAINING HEAVY OIL

Eman Al-Atar
Department of Chemical and Biological Engineering The University of British Columbia Vancouver, ВС, Canada V6T 1Z4

A. Paul Watkinson
Department of Chemical and Biological Engineering The University of British Columbia Vancouver, ВС, Canada V6T 1Z4

Abstract

Asphaltene precipitation from oils depends on the composition of solvent components such as resins and aromatics. Fouling of asphaltenes from a heavy oil in mixtures of fuel oil and de-asphalted vacuum bottoms was studied at asphaltene concentrations of 0.04 − 3.36 %, and resin concentrations of 3.1 − 4.9 %. Fluids under nitrogen were recirculated at 85°C through an annular test section with initial surface temperature of 230°C for periods up to 30 hours, and the fouling monitored by thermal measurement. The effects of concentration of heavy oil and de-asphalted oil are explored. Fouling rates are correlated with the ratio of resins / asphaltenes.