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Selection of Extraction Solvents for bitumen from Indonesian oil sands through Solubility Parameters

China Petroleum Processing & Petrochemical Technology 2022年第4期24卷 93-97页

作者： Cui Wenlong Zhu Qingqing Zhao Chenze Wang Cheli Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Zhejiang Chemical Products Quality Inspection Company Ltd. Hangzhou 310023China

Indonesian oil sands were systematically separated to investigate their basic composition.The extraction effects of the solvents with different Hilderbrand solubility parameters(HSPs)on the bitumen of Indonesian oil sands were compared.Furthermore,the Hansen solubility combination parameter(HSCP)and Teas triangle were used to explore rules in the separation of oil sands bitumen via solvent extraction.Finally,the saturates,aromatics,resins,and asphaltenes(SARA)fractions of the bitumen from Indonesian oil sands were analyzed.The results showed that the Indonesian oil sands were oil-wet with a bitumen content of 24.93%.The solvent extraction for bitumen could be accurately and conveniently selected based on the solubility parameter.When the HSPs of the extraction solvent were around 18–19 and the HSCPs were closer to a certain range(δ_(d)=17.5–18.0,δ_(p)=1–3.5,and δ_(h)=2–6),the extraction effect of bitumen from Indonesian oil sands improved,and the primary component affecting the extraction rate of bitumen were asphaltenes.

关键词： oil sand bitumen extraction solvent solubility parameter SARA fractions

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Bulk and molecular composition variations of gold-tube pyrolysates from severely biodegraded Athabasca bitumen

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Petroleum Science 2020年第6期17卷 1527-1539页

作者： Zhong-Xuan Li Hai-Ping Huang School of Energy Resources China University of Geosciences(Beijing)29 Xueyuan RoadBeijing 100083China School of Geosciences Yangtze UniversityWuhan 430100HubeiChina Department of Geoscience University of Calgary2500 University Drive NWCalgaryAB T2N 1N4Canada

Gold-tube pyrolysis experiments were performed on two Athabasca oil sand bitumens at 300℃to 525℃with 2℃/h rate and 25℃step under 50 MPa.Pyrolysis temperature of 425℃is critical for weight loss of bulk bitumen and hydrocarbon generation and destruction.Polar compounds are the main source of saturated and aromatic hydrocarbon,gas and coke fractions.Molecular compositions in pyrolyzates vary systematically with increasing pyrolysis temperatures.High molecular weight n-alkanes(C26^+) are gradually destructed during pyrolysis due to thermal cracking.Moderate molecular weight n-alkanes(C21-C25)show the highest thermal stability in designed pyrolysis temperatures.The loss of low molecular weight n-alkanes(C20^-)might be caused by volatilization during pyrolysis,which may alter commonly used molecular parameters such as∑n-C20^-/∑n-C21^+,Pr/n-C17 and Ph/n-C18.Aromatic hydrocarbons were generated from 300 to 425℃,then condensation and dealkylation have been initiated at 425℃as evidenced by decreased summed alkylnaphthalenes to alkylphenanthrenes ratios and increased unsubstituted aromatics to substituted homologs ratios in higher temperatures.The occurrence of anthracene and benz[a]anthracene in pyrolysates indicates pyrogenic origin,while fluoranthene shows unexpected behaviors during pyrolysis.Ratios derived from them are not always reliable for pyrogenic source input diagnosis in environmental samples.

关键词： oil sand bitumen Gold-tube Pyrolysis GC-MS Molecular compositions Athabasca

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