The Experts below are selected from a list of 45654 Experts worldwide ranked by ideXlab platform
Suoqi Zhao - One of the best experts on this subject based on the ideXlab platform.
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separation and characterization of Sulfur Compounds in ultra deep formation crude oils from tarim basin
Energy & Fuels, 2015Co-Authors: Meng Wang, Suoqi Zhao, Guangyou Zhu, Limin Ren, Xuxia Liu, Quan ShiAbstract:Sulfur Compounds in two representative deep crude oils (Ha9, 6598–6710 m; ZS1C, 6861–6944 m) with distinct levels of maturity from Tarim Basin, China, were analyzed by positive-ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The thiophenic and sulfidic Compounds were selectively separated from the crude oils with high purity and recovery by the methylation/demethylation approach and further characterized in detail by gas chromatography (GC) coupled with a Sulfur chemiluminescence detector (SCD) and GC–mass spectrometry (MS). The two crude oils have a large difference in Sulfur compound composition, which are both unique compared to common crude oils. A homologue series of 1,1-dimethylhexahydrodibenzothiophenes, which has been found as highly resistant organic Sulfur Compounds in diesel hydrodeSulfurization, was detected in Ha9 crude oil. This is the first time that these biomarker-like Compounds have been identified in crude oil. Thiadiamondoids (...
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approach for selective separation of thiophenic and sulfidic Sulfur Compounds from petroleum by methylation demethylation
Analytical Chemistry, 2015Co-Authors: Meng Wang, Keng H Chung, Suoqi Zhao, Quan ShiAbstract:Detailed characterization of petroleum derived Sulfur Compounds has been challenging, due to the complex composition of the hydrocarbon matrix. A novel method was developed for selective separation of thiophenic and sulfidic Compounds from petroleum. Sulfur Compounds were methylated to sulfonium salts by AgBF4 and CH3I, then the polar salts were separated by precipitation from petroleum matrix. The thiophenic and sulfidic sulfonium salts were sequentially demethylated with 7-azaindole and 4-dimethylaminopyridine, obtaining original thiophenic and sulfidic Compounds, respectively. The method was validated by model Compounds, and applied to a diesel and a vacuum distillation petroleum fraction. Sulfur fractions were characterized by gas chromatography (GC) coupled with a Sulfur chemiluminescence detector (SCD) and quadrupole mass spectrometry (MS), and high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The technique was effective to selectively obtain high-purity thiophenic and sulfidic Compounds and showed rare discrimination among Sulfur Compounds with ranging molecular weights and degrees of unsaturation. The method would facilitate multifaceted detailed characterization of Sulfur Compounds in an organic complex matrix.
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Keng H Chung, Yahe Zhang, Suoqi Zhao, Chunming XuAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Peng Liu, Keng H Chung, Yahe Zhang, Quan Shi, Na Pan, Suoqi ZhaoAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
Quan Shi - One of the best experts on this subject based on the ideXlab platform.
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separation and characterization of Sulfur Compounds in ultra deep formation crude oils from tarim basin
Energy & Fuels, 2015Co-Authors: Meng Wang, Suoqi Zhao, Guangyou Zhu, Limin Ren, Xuxia Liu, Quan ShiAbstract:Sulfur Compounds in two representative deep crude oils (Ha9, 6598–6710 m; ZS1C, 6861–6944 m) with distinct levels of maturity from Tarim Basin, China, were analyzed by positive-ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The thiophenic and sulfidic Compounds were selectively separated from the crude oils with high purity and recovery by the methylation/demethylation approach and further characterized in detail by gas chromatography (GC) coupled with a Sulfur chemiluminescence detector (SCD) and GC–mass spectrometry (MS). The two crude oils have a large difference in Sulfur compound composition, which are both unique compared to common crude oils. A homologue series of 1,1-dimethylhexahydrodibenzothiophenes, which has been found as highly resistant organic Sulfur Compounds in diesel hydrodeSulfurization, was detected in Ha9 crude oil. This is the first time that these biomarker-like Compounds have been identified in crude oil. Thiadiamondoids (...
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approach for selective separation of thiophenic and sulfidic Sulfur Compounds from petroleum by methylation demethylation
Analytical Chemistry, 2015Co-Authors: Meng Wang, Keng H Chung, Suoqi Zhao, Quan ShiAbstract:Detailed characterization of petroleum derived Sulfur Compounds has been challenging, due to the complex composition of the hydrocarbon matrix. A novel method was developed for selective separation of thiophenic and sulfidic Compounds from petroleum. Sulfur Compounds were methylated to sulfonium salts by AgBF4 and CH3I, then the polar salts were separated by precipitation from petroleum matrix. The thiophenic and sulfidic sulfonium salts were sequentially demethylated with 7-azaindole and 4-dimethylaminopyridine, obtaining original thiophenic and sulfidic Compounds, respectively. The method was validated by model Compounds, and applied to a diesel and a vacuum distillation petroleum fraction. Sulfur fractions were characterized by gas chromatography (GC) coupled with a Sulfur chemiluminescence detector (SCD) and quadrupole mass spectrometry (MS), and high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The technique was effective to selectively obtain high-purity thiophenic and sulfidic Compounds and showed rare discrimination among Sulfur Compounds with ranging molecular weights and degrees of unsaturation. The method would facilitate multifaceted detailed characterization of Sulfur Compounds in an organic complex matrix.
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Peng Liu, Keng H Chung, Yahe Zhang, Quan Shi, Na Pan, Suoqi ZhaoAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
Keng H Chung - One of the best experts on this subject based on the ideXlab platform.
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approach for selective separation of thiophenic and sulfidic Sulfur Compounds from petroleum by methylation demethylation
Analytical Chemistry, 2015Co-Authors: Meng Wang, Keng H Chung, Suoqi Zhao, Quan ShiAbstract:Detailed characterization of petroleum derived Sulfur Compounds has been challenging, due to the complex composition of the hydrocarbon matrix. A novel method was developed for selective separation of thiophenic and sulfidic Compounds from petroleum. Sulfur Compounds were methylated to sulfonium salts by AgBF4 and CH3I, then the polar salts were separated by precipitation from petroleum matrix. The thiophenic and sulfidic sulfonium salts were sequentially demethylated with 7-azaindole and 4-dimethylaminopyridine, obtaining original thiophenic and sulfidic Compounds, respectively. The method was validated by model Compounds, and applied to a diesel and a vacuum distillation petroleum fraction. Sulfur fractions were characterized by gas chromatography (GC) coupled with a Sulfur chemiluminescence detector (SCD) and quadrupole mass spectrometry (MS), and high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The technique was effective to selectively obtain high-purity thiophenic and sulfidic Compounds and showed rare discrimination among Sulfur Compounds with ranging molecular weights and degrees of unsaturation. The method would facilitate multifaceted detailed characterization of Sulfur Compounds in an organic complex matrix.
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Keng H Chung, Yahe Zhang, Suoqi Zhao, Chunming XuAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Peng Liu, Keng H Chung, Yahe Zhang, Quan Shi, Na Pan, Suoqi ZhaoAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
Chunming Xu - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Keng H Chung, Yahe Zhang, Suoqi Zhao, Chunming XuAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
Yahe Zhang - One of the best experts on this subject based on the ideXlab platform.
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Keng H Chung, Yahe Zhang, Suoqi Zhao, Chunming XuAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
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molecular characterization of Sulfur Compounds in venezuela crude oil and its sara fractions by electrospray ionization fourier transform ion cyclotron resonance mass spectrometry
Energy & Fuels, 2010Co-Authors: Peng Liu, Keng H Chung, Yahe Zhang, Quan Shi, Na Pan, Suoqi ZhaoAbstract:Venezuela crude oil was separated into saturates, aromatics, resins, and asphaltenes (SARA) fractions. The Sulfur Compounds in the crude oil and its SARA fractions were reacted with iodomethane in the presence of silver tetrafluoroborate and converted to methylsulfonium salts. The methylsulfonium salts were characterized by positive-ion electrospray ionization (ESI) and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). The S1, S2, S3, O1S1, O1S2, O2S1, and N1S1 class species were identified in crude oil derived methylsulfonium salts. The molecular composition and mass distribution of Sulfur Compounds in the subfractions were distinctly different. Small amounts of S1 class species (cyclic-ring sulfides) were present in the saturates fraction. Thiophenic Sulfur Compounds were dominant in the aromatics fraction. Complex multiheteroatoms (N1Sy, OxSy, and N1OxSy class species) were present in the resins and asphaltenes fractions. The relative abundance plots of double-bond equivalence (D...
