Simple Functionalization of Asphaltene and Its Application for Efficient Asphaltene Removal

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Asphaltene, the cheapest fraction of petroleum, was modified into a novel additive in order to facilitate a deasphalting process, such as paraffinic froth treatment. Asphaltene powder was oxidized by ozone, which is more powerful and less harmful to the environment than other oxidants. The ozonized asphaltene was characterized, and the reaction kinetics of ozonation was interpreted by the shrinking core model. Ozonized asphaltene was added to a water/n-pentane/bitumen emulsion to enhance the precipitation of asphaltene. Control of the properties of the precipitate was allowed by adjusting the ozonation degree and dosage of ozonized asphaltene. The removal of asphaltene was enhanced from 40% to a maximum of 70% by adding ozonized asphaltene under the same conditions. The boiling point distribution of deasphaltened oil indicates that a large amount of residue was removed using ozonized asphaltene. The dispersion behavior was checked by measuring the aggregate size in toluene and alkane solution. It was confirmed that asphaltene and ozonized asphaltene can interact with each other with high affinity
Publisher
AMER CHEMICAL SOC
Issue Date
2016-09
Language
English
Article Type
Article
Keywords

CRUDE OIL-EMULSIONS; TRANSFORM INFRARED-SPECTROSCOPY; HEPTANE-TOLUENE MIXTURES; X-RAY-SCATTERING; FROTH TREATMENT; ATHABASCA ASPHALTENES; BITUMEN; PETROLEUM; RESINS; SANDS

Citation

ENERGY & FUELS, v.30, no.9, pp.6991 - 7000

ISSN
0887-0624
DOI
10.1021/acs.energyfuels.6b01184
URI
http://hdl.handle.net/10203/213884
Appears in Collection
CBE-Journal Papers(저널논문)
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