Characterization of asphaltenes from hydrotreated products by SEC, LDMS, LAMDI, NMR, and XRD

F. Trejo; J. Ancheyta; T. J. Morgan; A. A. Herod; R. Kandiyoti

doi:10.1021/ef060621z

Characterization of asphaltenes from hydrotreated products by SEC, LDMS, LAMDI, NMR, and XRD

F. Trejo, J. Ancheyta, T. J. Morgan, A. A. Herod, R. Kandiyoti

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

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Abstract

Maya crude was hydrotreated at different reaction conditions in a pilot plant. Asphaltenes were precipitated from hydrotreated products with n-heptane as a solvent in a pressurized system with heating and stirring. Structural characterization studies have been carried out on asphaltenes from Maya crude. Molecular-weight distributions were obtained by size-exclusion chromatography (SEC) using tetrahydrofuran (THF) and 1-methyl-2-pyrrolidinone (NMP) as solvents. Nonfragmenting techniques, such as laser desorption mass spectrometry (LDMS) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), were also used for determining molecular-weight distributions. Crystallite parameters of asphaltenes were studied by X-ray diffraction (XRD) after they were precipitated. Average structural parameters were calculated from nuclear magnetic resonance (NMR) spectra. The influence of reaction conditions are studied in terms of structural changes in asphaltenes.

Original language	English
Pages (from-to)	2121-2128
Number of pages	8
Journal	Energy and Fuels
Volume	21
Issue number	4
DOIs	https://doi.org/10.1021/ef060621z
State	Published - Jul 2007
Externally published	Yes

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title = "Characterization of asphaltenes from hydrotreated products by SEC, LDMS, LAMDI, NMR, and XRD",

abstract = "Maya crude was hydrotreated at different reaction conditions in a pilot plant. Asphaltenes were precipitated from hydrotreated products with n-heptane as a solvent in a pressurized system with heating and stirring. Structural characterization studies have been carried out on asphaltenes from Maya crude. Molecular-weight distributions were obtained by size-exclusion chromatography (SEC) using tetrahydrofuran (THF) and 1-methyl-2-pyrrolidinone (NMP) as solvents. Nonfragmenting techniques, such as laser desorption mass spectrometry (LDMS) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), were also used for determining molecular-weight distributions. Crystallite parameters of asphaltenes were studied by X-ray diffraction (XRD) after they were precipitated. Average structural parameters were calculated from nuclear magnetic resonance (NMR) spectra. The influence of reaction conditions are studied in terms of structural changes in asphaltenes.",

author = "F. Trejo and J. Ancheyta and Morgan, {T. J.} and Herod, {A. A.} and R. Kandiyoti",

year = "2007",

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doi = "10.1021/ef060621z",

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T1 - Characterization of asphaltenes from hydrotreated products by SEC, LDMS, LAMDI, NMR, and XRD

AU - Trejo, F.

AU - Ancheyta, J.

AU - Morgan, T. J.

AU - Herod, A. A.

AU - Kandiyoti, R.

PY - 2007/7

Y1 - 2007/7

N2 - Maya crude was hydrotreated at different reaction conditions in a pilot plant. Asphaltenes were precipitated from hydrotreated products with n-heptane as a solvent in a pressurized system with heating and stirring. Structural characterization studies have been carried out on asphaltenes from Maya crude. Molecular-weight distributions were obtained by size-exclusion chromatography (SEC) using tetrahydrofuran (THF) and 1-methyl-2-pyrrolidinone (NMP) as solvents. Nonfragmenting techniques, such as laser desorption mass spectrometry (LDMS) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), were also used for determining molecular-weight distributions. Crystallite parameters of asphaltenes were studied by X-ray diffraction (XRD) after they were precipitated. Average structural parameters were calculated from nuclear magnetic resonance (NMR) spectra. The influence of reaction conditions are studied in terms of structural changes in asphaltenes.

AB - Maya crude was hydrotreated at different reaction conditions in a pilot plant. Asphaltenes were precipitated from hydrotreated products with n-heptane as a solvent in a pressurized system with heating and stirring. Structural characterization studies have been carried out on asphaltenes from Maya crude. Molecular-weight distributions were obtained by size-exclusion chromatography (SEC) using tetrahydrofuran (THF) and 1-methyl-2-pyrrolidinone (NMP) as solvents. Nonfragmenting techniques, such as laser desorption mass spectrometry (LDMS) and matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS), were also used for determining molecular-weight distributions. Crystallite parameters of asphaltenes were studied by X-ray diffraction (XRD) after they were precipitated. Average structural parameters were calculated from nuclear magnetic resonance (NMR) spectra. The influence of reaction conditions are studied in terms of structural changes in asphaltenes.

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DO - 10.1021/ef060621z

M3 - Artículo

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JO - Energy and Fuels

JF - Energy and Fuels

IS - 4

ER -

Characterization of asphaltenes from hydrotreated products by SEC, LDMS, LAMDI, NMR, and XRD

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