Separating crude oil (SARA)
Definition onset
The various models of a structure asphaltenes : packing (onion), continental (or island) and fractal
14/09/16
lecture 4
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Modern view at asphaltenes. (Lecture 4) презентация
Содержание
- 1. Modern view at asphaltenes. (Lecture 4)
- 2. 14/09/16 Component analysis Paraffines [alkanes]:
- 3. 14/09/16 High-molecular oil components Wax: С18-С35 (300-450
- 4. 14/09/16 RAS classification Resins: M 1000
- 5. 14/09/16 lecture 4
- 6. АFМ-image of asphaltenes at solid surface Energy&Fuels 2009 14/09/16 lecture 4
- 7. 14/09/16 lecture 4
- 8. Separating crude oil into saturates, aromatics, resins and asphaltenes (SARA) 14/09/16 lecture 4
- 9. 14/09/16 lecture 4
- 10. Molecular structure of proposed resin molecule 14/09/16 lecture 4
- 11. The main properties and hypothetical asphaltene molecule
- 12. 14/09/16 lecture 4 Asphaltenes extracted with two alkanes
- 13. 14/09/16 lecture 4
- 14. Packing model of asphaltene structure (Yen, 1961)
- 15. The scheme of association
- 16. 14/09/16 Organization level of ashaltens (1) Monomers
- 17. Organization level of ashaltens (2) Monomers
- 18. 14/09/16 Dimers structure lecture 4
- 19. 14/09/16 lecture 4 Molecular structures of proposed
- 20. The histogram of distribution of components in
- 21. A way of looking at aggregation behavior of asphaltenes with increasing concentration 14/09/16 lecture 4
- 22. The fractal model of consecutive aggregation of
Слайд 1Modern view at asphaltenes
The basic idea about the PDS dispersed phase
- resins, asphaltenes, carbenes and carboids
Separating crude oil (SARA)
Definition onset
The various models of a structure asphaltenes : packing (onion), continental (or island) and fractal
Separating crude oil (SARA)
Definition onset
The various models of a structure asphaltenes : packing (onion), continental (or island) and fractal
Слайд 214/09/16
Component analysis
Paraffines [alkanes]: n-/izostructure
Naphthenes: [cycloalkanes]
Aromatic hydrocarbons [arenes]
Hydrocarbons of mixed
structure: in Diesel fraction and above
Non-hydrocarbon oil components: S, N, O
Mineral components: H2O, salts
Macromolecular components
Non-hydrocarbon oil components: S, N, O
Mineral components: H2O, salts
Macromolecular components
lecture 4
Слайд 314/09/16
High-molecular oil components
Wax:
С18-С35 (300-450 а.е.)
Cerezines:
С36-С55 (500-700 а.е.)
Resins-asphaltenic substances (RAS):
Resines: < 1000
а.е.
Asphaltenes: > 1000 а.е.
Asphaltenes: > 1000 а.е.
lecture 4
Слайд 414/09/16
RAS classification
Resins:
M
aliphatic chains
Asphaltenes:
M > 1000
≈ 1 D and above
insoluble in alkanes
soluble in benzene,CS2, CCl4, etc.
tend to associations, define the structure of oil disperse systems
Asphaltenes:
M > 1000
≈ 1 D and above
insoluble in alkanes
soluble in benzene,CS2, CCl4, etc.
tend to associations, define the structure of oil disperse systems
lecture 4
Слайд 8Separating crude oil into saturates, aromatics, resins and asphaltenes (SARA)
14/09/16
lecture 4
Слайд 11The main properties and hypothetical asphaltene molecule
H/C = 0,8-1,4
molecular weight distribution
Monomers= 500-1000 Oligomers= 1000-5000
Heteroatoms, мас. %:
S = 0,5 - 10; N = 0,6 – 2,6; O = 0,3 - 4,8 Metals: Ni, V, Fe
Heteroatoms, мас. %:
S = 0,5 - 10; N = 0,6 – 2,6; O = 0,3 - 4,8 Metals: Ni, V, Fe
14/09/16
lecture 4
Слайд 14Packing model of asphaltene structure (Yen, 1961)
Packing structures in diameter
of 0,9-1,7 nm from 4-5 layers, being at 0,36 nm each one from other.
By rectilinear pieces are shown flat polyarenous, and broken lines - the saturated fragments of molecules.
By rectilinear pieces are shown flat polyarenous, and broken lines - the saturated fragments of molecules.
14/09/16
lecture 4
Слайд 15 The scheme of association asphaltenes in process of introduction sedimentator (lungs
n-alkanes) in the PDS (T.Yen, 1961)
I - molecular state
(up to 1 nm)
II – colloidal state
(1-100 nm)
III - disperse - stable state
(100 nm - 1 mc)
IY- disperse - unstable state
(> 1 mc)
14/09/16
lecture 4
Слайд 1614/09/16
Organization level of ashaltens (1)
Monomers
Yen elementary particles (9 ÷ 17 Å)
Oligomers
(25 ÷ 50 Å)
Polymers (> 150 Å)
+ Aggregation processes, including the processes of gel / glass
Polymers (> 150 Å)
+ Aggregation processes, including the processes of gel / glass
lecture 4
Слайд 17Organization level of ashaltens (2)
Monomers Yen elementary particles
Oligomers
(dimers, trimers, tetramers)
14/09/16
lecture 4
Слайд 1914/09/16
lecture 4
Molecular structures of proposed asphaltens molecules
(a) Maya crude oil
(Mexico) (b)Venezuelan crude oil
Слайд 20The histogram of distribution of components in the ODS of a
destructive origin (the rests of thermal processes of oil refining)
14/09/16
lecture 4
The scheme of allocation
carbens and carboids
Asphaltenes+carbens+ carboids
CCl4
asphaltenes (in solution CCl4) and
carbens + carboids
(in a deposit)
CS2
Carbens (in solution CS2) and
carboids (in a deposit)
cracking residues
Слайд 21A way of looking at aggregation behavior of asphaltenes with increasing
concentration
14/09/16
lecture 4
Слайд 22The fractal model of consecutive aggregation of asphaltenes
Average density of
a fractal
ρ(r) = const / r D-d
Weight of a fractal of M (number of forming particles)
М ~ r d , where
r - radius particle,
d, D - topological and fractal dimension
ρ(r) = const / r D-d
Weight of a fractal of M (number of forming particles)
М ~ r d , where
r - radius particle,
d, D - topological and fractal dimension
14/09/16
lecture 4
