Detection and significance of higher thiadiamondoids and diamondoidthiols in oil from the Zhongshen 1C well of the Tarim Basin, NW China

Ma, Aiyuan; Jin, Zhijun; Zhu, Chen; Gu, Yongan

doi:10.1007/s11430-017-9244-7

Cited by 16 publications

(12 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Higher thiadiamondoids, including 2−6 cages, were discovered in a gas condensate produced from a very deep petroleum reservoir in the northern Gulf of Mexico, USA. 118 Thiadiamondoids with multiple lattice cages were also detected in condensates from the Tarim Basin in China 73,74,77 Thiadiamondoids occur in high-maturity crude oils, especially crude oil with the TSR process, and are orders of magnitude more abundant in TSR-altered oil than in unaltered oil. 64 These compounds were considered to be a molecular proxy for the occurrence and extent of TSR, 64,117−121 although a sulfur isotope analysis indicated that the formation of these compounds is not exclusive to TSR reactions and that they can also form through a reaction with reduced sulfur species apart from sulfate reduction.…”

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 97%

“…Higher thiadiamondoids, including 2–6 cages, were discovered in a gas condensate produced from a very deep petroleum reservoir in the northern Gulf of Mexico, USA . Thiadiamondoids with multiple lattice cages were also detected in condensates from the Tarim Basin in China ,, …”

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 98%

“…The products are mainly thiophenic compounds with high molecular condensation degrees, such as BTs and DBTs. Thiadiamondoids and diamondoidthiols, as well as thiols, are often found in these oils. ,− …”

Section: Geological Formation Of Sulfur Compoundsmentioning

confidence: 99%

“…Zhu et al detected a thiadiamondoid series containing 267 components with a total concentration of 28 mg/g and reported the identification of 11 dithiatriamantanes and 3 tetrathiadiamantanes for the first time in natural oils. Ma et al reported that the concentrations of lower thiadiamondoids of an oil from well ZS1C are up to 8578 ppm, which are far higher than those of most oils in the Tarim Basin.…”

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 99%

See 3 more Smart Citations

Review on Sulfur Compounds in Petroleum and Its Products: State-of-the-Art and Perspectives

Shi

2021

Energy Fuels

View full text Add to dashboard Cite

Sulfur compounds have significant geochemical information, and the removal of sulfur from petroleum products is one of the most important tasks in petroleum refining. However, it is a challenging task to reveal the chemical composition of sulfide at the molecular level because of its complex composition. Unremitting efforts have been made to develop methods for the separation and characterization of sulfur compounds in petroleum and its products in order to understand the mechanisms of their geological origin and their transformation in petroleum processing. Sulfur compounds include thiophenes, sulfides, thiols, sulfoxides, and sulfones, etc. The sulfur element is mainly from sulfate in the sedimentary environment, but the combination of sulfur into hydrocarbons could occur in different ways. Most sulfur compounds are generated in the early diagenetic period through the reaction of unsaturated organic matter with H2S or elemental sulfur released from sulfate via bacterial sulfate reduction. The composition of the sulfur compound in petroleum could be largely altered by thermal maturation, leading to an increase in the relative abundance of highly condensed aromatic sulfur compounds. Another important pathway of sulfur addition is thermochemical reactions between sulfate and hydrocarbons at high temperatures. Some sulfur compounds have a relatively weak chemical stability and are easily decomposed into small-molecule sulfur compounds in petroleum processing. Removing sulfur from petroleum is an essential task for petroleum refinement and upgrading, in which the steric hindrance effect is the most important factor affecting the desulfurization activity of sulfur compounds via hydrotreating. Some polar sulfur compounds are difficult to hydrogenate to remove sulfur; however, the chemical structures of these compounds are unclear. High-resolution mass spectrometry has revealed the high complexity of the molecular composition of sulfur compounds in heavy oils and their polar fractions. However, understanding of their molecular structure is limited, and further research should focus on the formation and transformation mechanism of these polar sulfur compounds. This review will focus on the molecular composition of petroleum sulfur compounds with a collection of topics of sulfur compounds that covers the upstream and downstream petroleum industry, including separation and characterization methods, molecular and structural composition of various sulfur compounds, mechanisms of their geological origin, and their transformation during petroleum processing.

show abstract

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 97%

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 98%

Section: Geological Formation Of Sulfur Compoundsmentioning

confidence: 99%

Section: Composition Of Sulfur Compounds In Petroleummentioning

confidence: 99%

See 2 more Smart Citations

Review on Sulfur Compounds in Petroleum and Its Products: State-of-the-Art and Perspectives

Shi

2021

Energy Fuels

View full text Add to dashboard Cite

show abstract

“…Thiols are important types of OSCs in petroleum, whose formation and transformation are the most important parts in the natural sulfur cycle. − Thiols may be the intermediate products at the earliest stages of diagenesis, by which abundant organic carbon was allowed to be preserved in the rock record . Thiols in crude oil have a close and complex relationship with the sulfate thermal reduction (TSR) process that occurred in many high temperature reservoirs. − TSR reduces sulfates to sulfides and oxidizes hydrocarbons to carbon dioxide, whose reaction network seems complex and pathways and mechanism have not been completely revealed . Thiols are considered as the intermediate products of the TSR process, and simulation experiments have proved that thiols can play an autocatalytic role and accelerate related reactions .…”

Section: Introductionmentioning

confidence: 99%

Identification and Geological Implication of Thiols in the Condensate Oils

Wang,

Wu,

et al. 2023

Energy Fuels

View full text Add to dashboard Cite

Thiols (or mercaptans) are widely present in petroleum but generally in trace amounts. Their formation and transformation are important parts of the geochemical sulfur cycle, but the characterization of these compounds is not comprehensive due to their thermal instability and trace content. In this work, the methylation/demethylation method was performed to separate sulfur compounds in two condensate oils, while thiols therein were derived into alkyl methyl sulfides and also isolated during the process. There were negligible sulfides and thiophenes separated, while the separated thiols accounted for 29.0% and 52.4% of the two condensate oils in total sulfur content, respectively. This indicates that the content of these thiols is abnormally high, thus allowing for a detailed analysis of such species. The separated methylated thiols were analyzed by gas chromatography with a sulfur selective detector and mass spectrometry, and the results were in good agreement with the composition obtained by Fourier transform ion cyclotron resonance mass spectrometry. The specific structures and abundances of individual n-alkyl, iso-alkyl, and monocycloalkyl thiols were identified, indicating carbonium ions may be intermediates of sulfurization during the diagenesis process. This work complements the characterization of thiols in petroleum and provides important evidence for the complex thermochemical sulfate reduction reaction network.

show abstract

Naturally Occurring Diamondoids

2024

The Chemistry of Diamondoids

View full text Add to dashboard Cite

Detection and significance of higher thiadiamondoids and diamondoidthiols in oil from the Zhongshen 1C well of the Tarim Basin, NW China

Cited by 16 publications

References 35 publications

Review on Sulfur Compounds in Petroleum and Its Products: State-of-the-Art and Perspectives

Review on Sulfur Compounds in Petroleum and Its Products: State-of-the-Art and Perspectives

Identification and Geological Implication of Thiols in the Condensate Oils

Naturally Occurring Diamondoids

Contact Info

Product

Resources

About