Sulfur isotope exchange between thiophenes and inorganic sulfur compounds under hydrous pyrolysis conditions

被引:13
|
作者
Meshoulam, Alexander [1 ]
Amrani, Alon [1 ]
机构
[1] Hebrew Univ Jerusalem, Inst Earth Sci, IL-91904 Jerusalem, Israel
关键词
Thermal maturation; Isotope exchange; Thermochemical sulfate reduction; Petroleum; THERMOCHEMICAL SULFATE REDUCTION; SEDIMENTARY ORGANIC-MATTER; HIGH-TEMPERATURE CHEMISTRY; ELEMENTAL SULFUR; ORGANOSULFUR COMPOUNDS; SMACKOVER FORMATION; CHEMICAL-REDUCTION; PETROLEUM; SULFIDE; RESERVOIRS;
D O I
10.1016/j.orggeochem.2016.10.006
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Sulfur isotope fractionation during thermal degradation of aromatic organic sulfur compounds was studied utilizing quartz tube-hydrous pyrolysis at 360 degrees C. BT (benzothiophene), DBT (dibenzothiophene), 3-PT (3-phenylthiophene) and 2-OT (2-octylthiophene) were used to represent organic sulfur compounds with a range of thermal stabilities. These compounds were heated for 40 h with and without the addition of reduced inorganic sulfur species: elemental S, sodium sulfide (Na2S*9H(2)O) and sodium sulfite (Na2SO3). The extent of degradation of each compound showed good correlations with its aromatic stabilization and strongly depended on the added inorganic sulfur species, with DBT being the most stable and 2-OT the least stable. Sulfur isotope enrichments up to 2.2% resulted from the thermal degradation of thiophenes. A significant decrease in stability of thiophenes was observed in the presence of reduced sulfur species. In contrast, BT and DBT did not show any exchange of S isotopes with external reduced S pool, while 3-PT did experience S isotope exchange. The results of the present study suggest that the main controls on the delta S-34 values of BT and DBT during TSR are the relative rates of their degradation and their formation from the reaction between TSR-H2S and petroleum hydrocarbons. This finding improves our confidence in using the delta S-34 of individual thiophenes as reliable proxies for the occurrence and extent of thermal maturation and thermochemical sulfate reduction. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:79 / 87
页数:9
相关论文
共 50 条
  • [41] Exchange of reduced volatile sulfur compounds between leaf litter and the atmosphere
    Kesselmeier, J
    Hubert, A
    ATMOSPHERIC ENVIRONMENT, 2002, 36 (29) : 4679 - 4686
  • [42] SULFUR ISOTOPE-EFFECTS .4. SULFUR ISOTOPE-EFFECTS IN ANION-EXCHANGE SYSTEMS
    ERIKSEN, TE
    ACTA CHEMICA SCANDINAVICA, 1972, 26 (03): : 980 - &
  • [43] PETROLEUM SULFUR-COMPOUNDS .10. DIINDENO(B,D)THIOPHENES FROM INDENES OR DIINDENES AND SULFUR
    CZOGALLA, CD
    BOBERG, F
    PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 1987, 33 (1-2): : 83 - 86
  • [44] Molecular and isotope characterization of hydrocarbon products from organic-sulfur-rich mudstones during closed hydrous-pyrolysis
    Cesar, Jaime
    Reyes, Julito
    Ardakani, Omid H.
    Knapp, Levi J.
    ORGANIC GEOCHEMISTRY, 2025, 202
  • [45] Kinetics of sulfur isotope exchange between aqueous sulfide and thiosulfate involving intra- and intermolecular reactions at hydrothermal conditions
    Chu, X
    Ohmoto, H
    Cole, DR
    CHEMICAL GEOLOGY, 2004, 211 (3-4) : 217 - 235
  • [46] Effects of Fe3+ on sulfur release during pyrolysis of sulfur-containing model compounds under different atmospheres
    Wang, Junshan
    Guo, Huiqing
    Xue, Yaming
    Wang, Meijun
    Hu, Ruisheng
    Liu, Fenrong
    JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2022, 147 (02) : 1597 - 1605
  • [47] Effect of thermal maturation on the isotopic compositions of volatile organic sulfur compounds released from a kerogen by hydrous and anhydrous pyrolysis
    Xiao, Qilin
    Kutuzov, Ilya
    Said-Ahmad, Ward
    Duan, Yangdi
    Cai, Suyang
    Amrani, Alon
    JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 2023, 171
  • [48] Effects of Fe3+ on sulfur release during pyrolysis of sulfur-containing model compounds under different atmospheres
    Junshan Wang
    Huiqing Guo
    Yaming Xue
    Meijun Wang
    Ruisheng Hu
    Fenrong Liu
    Journal of Thermal Analysis and Calorimetry, 2022, 147 : 1597 - 1605
  • [49] SULFUR ISOTOPE EXCHANGE CATALYZED BY ALUMINUM-CHLORIDE
    YAO, JX
    YAN, ZM
    ACTA CHIMICA SINICA, 1981, 39 (03) : 255 - 262
  • [50] Sulfur Transformation Behavior of Inorganic Sulfur-Containing Compounds in Chemical Looping Combustion
    Wang, Chao
    Luo, Ming
    Zhou, Lunzheng
    Zhang, Haiyan
    ENERGY & FUELS, 2020, 34 (03) : 3969 - 3975