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Origin of Unliberated Bitumen in Athabasca Oil Sands

Petroleum Science 2005年第1期2卷 9-14页

作者： TuYun J.B.O＇Carroll B.D.Sparks L.S.Kotlyar S.Ng K.H.Chung G.Cuddy StateKeyLaboratoryofHeavyOilProcessing UniversityofPetroleumBeijing102249China NationalResearchCouncilofCanada InstituteforChemicalProcessandEnvironmentalTechnologyMontrealRoadCampusOttawaOntarioCanadaKIA0R6 syncrudecanadaltd. EdmontonResearchCentre9421-17thAvenueEdmontonAlbertaCanadaT6N1H4）

Oil sands contain a so-called organic rich solids component (ORS), i.e., solids whose surfaces are strongly associated with toluene insoluble organic matter (TIOM). Typically, humic material is the major component of TIOM. It provides sites for adsorption and chemical fixation of bitumen. This bound bitumen is “unliberated”, and considerable mechanical or chemical energy may be required to release it. In order to establish a correlation between bitumen recovery and ORS content, a few selected oil sands were processed in a Batch Extraction Unit (BEU). Analysis of the middlings and coarse tailings streams from these tests indicated a relatively constant bitumen to ORS ratio of 2.8±0.7. This value allows the liberated-unliberated bitumen balance (LUBB) to be calculated for any given oil sands. The amounts of bitumen recovered as primary froth during the BEU experiments are close to the estimated liberated bitumen contents in each case tested. This observation indicates that the liberated-unliberated bitumen calculation is an important quantitative parameter for prediction of bitumen recovery under specific recovery conditions. Preliminary results indicate that the ORS content of an oil sands may be estimated from the carbon content of bitumen free oil sands solids.

关键词： Oil sands bitumen recovery organic rich solids unliberated bitumen

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Diesel and Jet Fuels from Bitumen-derived Middle Distillates

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Petroleum Science 2004年第1期1卷 75-82页

作者： SokYui syncrudecanadaltd 9421-17AvenueEdmontonAlbertaT6N1H4Canada

Narrow fractions of light gas oils obtained from various upgrading processes of Athabasca oilsands bitumen were investigated as diesel and jet fuels. The relationship among the boiling range, cetane number, smoke point, and other properties such as aromatics content, aniline point, and the sulfur and nitrogen content was also studied. The study reveals that when appropriate processes and distillation boiling ranges are selected, oilsands bitumen can produce diesel and jet fuels that meet stringent environmental regulations and future product specifications. New correlations to predict CN and smoke point were developed as a function of density, boiling ranges by simulated distillation, and mono- and total aromatics by supercritical fluid chromatography. The correlations apply to bitumen-derived middle distillates that have a wide range of boiling points.

关键词： Cetane number diesel fuel jet fuel oilsands bitumen smoke point

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