Quantifying the Role of Ultrasonic Wave Radiation on Kinetics of Asphaltene Aggregation in a Toluene–Pentane Mixture
| Autor: | Riyaz Kharrat, Cyrus Ghotbi, Ahmad Ramazani, I. Najafi, Mohammad Hossein Ghazanfari, S. M. R. Mousavi, Mahmood Amani |
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| Rok vydání: | 2011 |
| Předmět: |
Flocculation
Chromatography Aggregate (composite) General Chemical Engineering Sonication Kinetics Energy Engineering and Power Technology General Chemistry Geotechnical Engineering and Engineering Geology Pentane chemistry.chemical_compound Colloid Fuel Technology chemistry Chemical engineering Ultrasonic sensor Asphaltene |
| Zdroj: | Petroleum Science and Technology. 29:966-974 |
| ISSN: | 1532-2459 1091-6466 |
| DOI: | 10.1080/10916460903394144 |
| Popis: | Recently, ultrasonic wave technology has received much attention as a method for removal of asphaltene deposits from the near wellbore region. However, very little is known about another feature of this technology on the kinetics of asphaltene molecules aggregation. In this work, the kinetics of asphaltene flocculation in several crude oil samples exposed to ultrasonic waves for different time intervals is studied by confocal microscopy. The colloidal structural evolutions of flocks are described by analysis of size distribution of flocculated asphaltene particles. The results show that for the first 90 min of flocculation time, the size of aggregates increases rapidly, and a reaction-limited aggregation model matches well with the experimental data for all samples. But, after 90 min, a reduction in aggregate size of sonicated samples is observed, whereas the aggregate size of nonsonicated oil samples increases in close agreement with the diffusion-limited aggregation model. It has been found tha... |
| Databáze: | OpenAIRE |
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