Interactions between asphaltenes and naphthenic acids

Jenny Ann Östlund; Magnus Nydén; Inge Harald Auflem; Johan Sjöblom

doi:10.1021/ef020103y

Interactions between asphaltenes and naphthenic acids

Jenny Ann Östlund, Magnus Nydén, Inge Harald Auflem^*, Johan Sjöblom

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

Asphaltenes separated from two different North Sea oils were studied upon addition of two kinds of naphthenic acids by employing PFG-SE NMR (pulsed field gradient-spin echo nuclear magnetic resonance) and NIR (near-infrared) spectroscopy. The results indicated that there were interactions between asphaltenes and naphthenic acids. It also appeared as if the tendency of the acids to interact with asphaltenes depended on the asphaltene type. Furthermore, a concentration series of one of the asphaltenes was prepared, and a dramatic decrease in diffusion coefficients upon increased concentration was observed. This suggests that the asphaltenes studied were prone to self-associate in toluene-d₈.

Original language	English
Pages (from-to)	113-119
Number of pages	7
Journal	Energy and Fuels
Volume	17
Issue number	1
DOIs	https://doi.org/10.1021/ef020103y
Publication status	Published - 1 Jan 2003
Externally published	Yes

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abstract = "Asphaltenes separated from two different North Sea oils were studied upon addition of two kinds of naphthenic acids by employing PFG-SE NMR (pulsed field gradient-spin echo nuclear magnetic resonance) and NIR (near-infrared) spectroscopy. The results indicated that there were interactions between asphaltenes and naphthenic acids. It also appeared as if the tendency of the acids to interact with asphaltenes depended on the asphaltene type. Furthermore, a concentration series of one of the asphaltenes was prepared, and a dramatic decrease in diffusion coefficients upon increased concentration was observed. This suggests that the asphaltenes studied were prone to self-associate in toluene-d8.",

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AU - Östlund, Jenny Ann

AU - Nydén, Magnus

AU - Auflem, Inge Harald

AU - Sjöblom, Johan

PY - 2003/1/1

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N2 - Asphaltenes separated from two different North Sea oils were studied upon addition of two kinds of naphthenic acids by employing PFG-SE NMR (pulsed field gradient-spin echo nuclear magnetic resonance) and NIR (near-infrared) spectroscopy. The results indicated that there were interactions between asphaltenes and naphthenic acids. It also appeared as if the tendency of the acids to interact with asphaltenes depended on the asphaltene type. Furthermore, a concentration series of one of the asphaltenes was prepared, and a dramatic decrease in diffusion coefficients upon increased concentration was observed. This suggests that the asphaltenes studied were prone to self-associate in toluene-d8.

AB - Asphaltenes separated from two different North Sea oils were studied upon addition of two kinds of naphthenic acids by employing PFG-SE NMR (pulsed field gradient-spin echo nuclear magnetic resonance) and NIR (near-infrared) spectroscopy. The results indicated that there were interactions between asphaltenes and naphthenic acids. It also appeared as if the tendency of the acids to interact with asphaltenes depended on the asphaltene type. Furthermore, a concentration series of one of the asphaltenes was prepared, and a dramatic decrease in diffusion coefficients upon increased concentration was observed. This suggests that the asphaltenes studied were prone to self-associate in toluene-d8.

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JO - Energy and Fuels

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Interactions between asphaltenes and naphthenic acids

Abstract

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