期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 495, 期 -, 页码 136-148出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2016.02.011
关键词
Asphaltene fractionation; Elemental analysis; FTIR; QCM-D
资金
- JIP Asphaltene consortium Improved Mechanism of Asphaltene Deposition, Precipitation and Fouling to Minimize Irregularities in Production and Transport A Cost Effective and Environmentally Friendly Approach (NFR PETROMAKS) [234112]
- Norwegian Research Council
- AkzoNobel
- British Petroleum
- Canada Natural Resources
- Nalco Champion
- Petrobras
- Statoil
- Total
A new fractionation procedure was developed based on adsorption of asphaltenes onto calcium carbonate. The fractions obtained were characterized by elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR) and Quartz Crystal Microbalance with Dissipation (QCM-D). FTIR analysis indicated that the sub fractions obtained differed in the amount of carbonyl, carboxylic acid or derivative groups present in them. The adsorption of these fractions on stainless steel was studied by QCM-D. While the unfractionated asphaltenes exhibited a maximum saturation adsorption (F-max ) of 3.4 mg/m(2), the sub-fractions did not however show a F-max within the concentration range tested (0.01-1.5 g/l). The asphaltene fraction with highest concentration of carbonyl, carboxylic acid or derivative groups formed visco-elastic layers on stainless steel and also exhibited maximum adsorption (around 8 mg/m(2)). Finally, results obtained from QCM-D measurement suggest that the interaction of the asphaltene sub-fractions tend to prevent an adsorption of unfractionated asphaltenes onto stainless steel. (C) 2016 Elsevier B.V. All rights reserved.
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