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Asphaltene reaction via supercritical fluid extraction ...
Asphaltene reaction via supercritical fluid extraction. Supercritical fluid extraction (SFE) of bitumen was carried out in a continuous extractor using propane as the solvent at several temperatures and pressures. The asphaltene contents of the residual fractions in the extractor were compared to the asphaltene content of the original bitumen ...
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Spotlight onto surfactant–steam–bitumen interfacial ...
It is worth highlighting that the asphaltene stability index, the ratio of asphaltene + saturates to aromatics + resins 95, of a bitumen sample in …
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Precipitation of Asphaltenes - an overview | ScienceDirect ...
The asphaltene content of an asphalt provides important information about the nature of an asphalt. Asphalts with high asphaltene contents almost always are high in sulfur content and may be expected to readily undergo oxidative age hardening. Asphaltenes are the viscosity-building component of asphalts, although it is not necessarily true that ...
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Effects of the asphaltene and resin contents of the ...
A systematic characterization of 11 different bitumen and crude oil samples is carried out on the basis of their density, viscosity, asphaltene content, and asphaltene composition. n-pentane is ...
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Asphalt - Wikipedia
Asphalt, also known as bitumen (UK: / ˈ b ɪ tj ʊ m ɪ n /, US: / b ɪ ˈ tj uː m ə n, b aɪ-/), is a sticky, black, highly viscous liquid or semi-solid form of petroleum.It may be found in natural deposits or may be a refined product, and is classed as a pitch.Before the 20th century, the term asphaltum was also used. The word is derived from the Ancient Greek ἄσφαλτος ásphaltos.
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The effect of asphaltene on thermal properties of bitumen ...
As shown in Fig. 2, PI increases with asphaltene content of bitumen. Therefore, it is possible to change the temperature susceptibility by changing the amount of asphaltene in bitumen. Download : Download high-res image (109KB) Download : Download full-size image; Fig. 2. Comparing the effect of asphaltene content in aged/unaged bitumen on PI.
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(PDF) Tracing Sodium Naphthenate in Asphaltenes ...
Bitumen was initially diluted 2 wt % asphaltenes solutions in toluene or in a 70/30 mixture with naphtha at the naphtha to bitumen (N/B) ratio of 0.35 of toluene/heptane (referred to as T/H). The other series of and centrifuged at approximately 27000g for 30 min to remove model oils was 2 wt % SN solutions in toluene, n-heptane, fine solids.
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The effect of asphaltene on thermal properties of bitumen ...
A relation between the asphaltene content and the decomposition temperatures of asphalt was noted. The thermal stability decreased with more asphaltene content resulting in a lower char yield [6 ...
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The asphaltene content of Australian bitumens
Asphaltene content appeared to reduce in the period studied and this was attributed to the change from mainly air blown bitumens to mainly PPA bitumens. Air blowing and addition of PPA are two means by which soft bitumen residue from a refinery vacuum distillation column is hardened to a viscosity level suitable for paving use.
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Asphaltenes in asphalt: Direct observation and evaluation ...
The impacts of asphaltene content and morphology on the zero shear viscosity (ZSV) and derived ductility of asphalt are investigated. STEM images reveal that asphaltenes in non-aged asphalt are generally well dispersed, with occasional formation of large agglomerates, and both the size of well-dispersed asphaltenes and the abundance of the ...
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Materials | Free Full-Text | Bitumen Recovery from Crude ...
The asphaltene content of the bitumen extracted by n-heptane was 0 wt%, because asphaltene is defined as the component that is insoluble in n-heptane but soluble in toluene. N-pentane obtained 6.5 wt% asphaltene.
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US20120241390A1 - Bitumen extraction and asphaltene ...
US20120241390A1 US13/434,288 US201213434288A US2012241390A1 US 20120241390 A1 US20120241390 A1 US 20120241390A1 US 201213434288 A US201213434288 A US 201213434288A US 2012241390 A1 US2012241390 A1 US 2012241390A1 Authority US United States Prior art keywords shear reduced component bitumen oil Prior art date Legal status (The legal status is an …
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Asphalt, Bitumen and Tar – Types, Difference and Comparison
The lake asphalt contains 40 to 70 % of pure bitumen which is boiled in tank and water content evaporates and impurities are separated. The final product is called as asphalt which a=can be used for laying roads etc. Rock asphalt contains 10 to 15% of pure bitumen and calcareous matter.
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Refining Community | » Topic: Asphaltene content for DCU feed
Heavy crudes like Maya or Bitumen crudes are in the 16-25% range. If you mean what is the constraint on asphaltene before you make a shot coke then the asphaltene content must stay below 50% of the MCR / CCR. The Resids from blended Canadian & Venezuelan Bitumen crudes can have 25% asphaltene with MCR of 29%.
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Asphaltenes in asphalt: Direct observation and evaluation ...
The asphaltene content of asphalt AAD-1 is higher than that of AAK-1, but η r, 0 of AAD-1 is even slightly less than that of AAK-1. The STEM images of the two asphalts suggest the rod-like asphaltenes in AAK-1 are more extensive and larger in size.
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(PDF) Impact of maltene and asphaltene fraction on ...
Therefore, bitumen was separated into the maltene and asphaltene fractions and artificial bitumen samples with different, pre-defined asphaltene concentrations were produced and investigated.
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Relations between colloidal indices and low-temperature ...
Influence of asphaltene content on mechanical bitumen behavior: experimental investigation and micromechanical modeling. Mater. Struct., 48 (10) (2015), pp. 3099-3112. CrossRef View Record in Scopus Google Scholar.
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PERFORMANCE EVALUATION OF SOLVENT ASSISTED-STEAM …
the solvent-bitumen-steam interactions are not well understood, solvent-steam coinjection into bitumen reservoirs may lead to produce lower quality oil. Because of the high asphaltene content of bitumen reservoirs and the presence of clays in the reservoir,
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ASTM D6560 - 17 Standard Test Method for Determination of ...
1.1 This test method covers a procedure for the determination of the heptane insoluble asphaltene content of gas oil, diesel fuel, residual fuel oils, lubricating oil, bitumen, and crude petroleum that has been topped to an oil temperature of 260 °C (see A1.2.1.1).
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Asphaltene Content - an overview | ScienceDirect Topics
Predictions of the aromatic and asphaltene content in crude oil and bitumen remaining in source rocks cannot be made using standard published kinetics. A new saturate-aromatic-resin-asphaltene (SARA) kinetic modeling approach includes 11 components (four bitumen, two oil, three hydrocarbon gas, H 2 S, and CO 2) and can be used to improve predictions of the quality of migrated oil as well as ...
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Measurement Of Asphaltene Flocculation In Bitumen ...
Titrating a solution of bitumen in the solvent of interest with pentane and observing the onset of asphaltene flocculation yields the flocculation threshold for that solution. This information is often more useful than merely the dissolution properties of the solvent for asphaltenes or the standard asphaltene precipitation determination.
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Asphaltene — Viscosity Relationship Of Processed And ...
Bitumen and heavy oils produced in Alberta frequently contain asphaltenes. These asphaltenes may play a significant role in the primary upgrading or visbreaking of the bitumen and heavy oils. This paper describes an experimental study of the effect of asphaltene content on the viscosity of bitumen.
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Bitumen vs Asphaltene - What's the difference? | WikiDiff
As nouns the difference between bitumen and asphaltene is that bitumen is mineral pitch; a black, tarry substance, burning with a bright flame; jew's pitch it occurs as an abundant natural product in many places, as on the shores of the dead and caspian seas it is used in cements, in the construction of pavements, etc while asphaltene is (organic chemistry) any of the dark organic ...
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Solids Associated with the Asphaltene Fraction of Oil ...
Dilution of bitumen froth with a less polar solvent than naphtha reduces the overall stability of asphaltene micelles in the maltene component of bitumen. Asphaltene then co-precipitates with the inorganic particles and water to form a "rag layer". This process yields bitumen of excellent quality, in terms of solids and water content.
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What are asphaltenes in petroleum, oilsands, and heavy oil?
asphaltene fraction makes it very important in production and processing of petroleum. In comparison to a whole petroleum or bitumen, the asphaltenes have lower hydrogen content (4.8-8%), and a higher content of sulfur, nitrogen, nickel, vanadium, and oxygen. The low concentration of hydrogen gives a
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Asphaltene Deposition during Bitumen Extraction with ...
Solvent bitumen extraction processes are alternatives to thermal processes with potential for improved economic and environmental performance. However, solvent interaction with bitumen commonly results in in situ asphaltene precipitation and deposition, which can hinder flow and reduce the process efficiency. Successful implementation requires one to select a solvent that improves recovery ...
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US9469816B2 - Process for upgrading heavy oil and bitumen ...
Disclosed is a process for the upgrading and demetallizing of heavy oils and bitumens. A crude heavy oil and/or bitumen feed is supplied to a solvent extraction process 104 wherein DAO and asphaltenes are separated. The DAO is supplied to an FCC unit 106 having a low conversion activity catalyst for the removal of metals contained therein.
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Influence of asphaltene content on mechanical bitumen ...
an asphaltene content of 26.71 %. It is noticeable that there is an abrupt increase in stiffness, when only low Torque M DSR base plate DSR spindle Cover Bitumen sample Fig. 2 CR test using DSR experimental equipment Table 1 Experimental program for CR tests on artificially mixed bitumen Asphaltene content Test temperature - 5 C?15 0 0 vol
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Critical review of asphaltene properties and factors ...
Asphaltene is a component of crude oil that has been reported to cause severe problems during production and transportation of the oil from the reservoir. It is a solid component of the oil that has different structures and molecular makeup which makes it one of the most complex components of the oil. This research provides a detailed review of asphaltene properties, characteristics, and ...
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1. An increase in the asphaltene content of an | Chegg
Increasing the asphalt content of a given asphalt mixture will always result in (a) An increase in air void content (b) A decrease in air void content (c) An; Question: 1. An increase in the asphaltene content of an asphalt binder will lead to (a) A more solid-like response (b) A more fluid-like response (c) Higher modulus (d) Lower modulus (e ...
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