Characterization of extractable organosulfur constituents from Bevier seam coal

White, Curt M.; Douglas, L.J.; Perry, Mildred B.; Schmidt, Charles E.

doi:10.1021/ef00002a014

Cited by 47 publications

(19 citation statements)

References 4 publications

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“…Like NCCs, some SCCs can be separated from coals by low‐temperature extraction and thermal dissolution. Extracts from Soxhlet extraction of Bevier coal were subjected to preparative liquid chromatography and the resulting fractions were analyzed by GC with sulfur‐selective detector, GC/MS, and high‐resolution MS to identify SCCs (White et al, ). S‐ heterocyclic aromatics, such as benzothiophene, dibenzothiophene, and benzo[ b ]naphthothiophene along with their alkylated homologues, were identified by GC and GC/MS.…”

Section: Small‐molecular Chemicals In Cdls Identified By Gc/msmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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Coal-derived liquids (CDLs) are primarily generated from pyrolysis, carbonization, gasification, direct liquefaction, low-temperature extraction, thermal dissolution, and mild oxidation. CDLs are important feedstocks for producing value-added chemicals and clean liquid fuels as well as high performance carbon materials. Accordingly, the compositional characterization of chemicals in CDLs at the molecular level with advanced analytical techniques is significant for the efficient utilization of CDLs. Although reviews on advancements have been rarely reported, great progress has been achieved in this area by using gas chromatography/mass spectrometry (GC/MS), two-dimensional GC-time of flight mass spectrometry (GC × GC-TOFMS), and Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). This review focuses on characterizing hydrocarbon, oxygen-containing, nitrogen-containing, sulfur-containing, and halogen-containing chemicals in various CDLs with these three mass spectrometry techniques. Small molecular (< 500 u), volatile and semi-volatile, and less polar chemicals in CDLs have been identified with GC/MS and GC × GC-TOFMS. By equipped with two-dimensional GC, GC × GC-TOFMS can achieve a clearly chromatographic separation of complex chemicals in CDLs without prior fractionation, and thus can overcome the disadvantages of co-elution and serious peak overlap in GC/MS analysis, providing much more compositional information. With ultrahigh resolving power and mass accuracy, FT-ICR MS reveals a huge number of compositionally distinct compounds assigned to various chemical classes in CDLs. It shows excellent performance in resolving and characterizing higher-molecular, less volatile, and polar chemicals that cannot be detected by GC/MS and GC × GC-TOFMS. The application of GC × GC-TOFMS and FT-ICR MS to chemical characterization of CDLs is not as prevalent as that of petroleum and largely remains to be developed in many respects. © 2016 Wiley Periodicals, Inc. Mass Spec Rev 36:543-579, 2017.

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Section: Small‐molecular Chemicals In Cdls Identified By Gc/msmentioning

confidence: 99%

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Liu

Fan

Wei

et al. 2016

Mass Spectrometry Reviews

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“…High-sulfur coal research have included the relationship between the source of sulfur in the coal and the sedimentary environment (Diessel, 1992;Spears et al, 1999;Liu et al, 2001;Shao et al, 2003;Dai et al, 2008Dai et al, , 2013, the distribution of sulfur in coal macerals (Reggel et al, 1970;Tseng et al, 1986;Hippo et al, 1987;Chou, 1990;Dai et al, 2002), and organic sulfur compounds (Ignasia et al, 1978;White and Lee, 1980;Calkins, 1987;White et al, 1987;Nishioka, 1988;Wang et al, 1994;Sun, 1999;Sun et al, 2006). Numerous studies have been conducted in this field globally.…”

Section: Introductionmentioning

confidence: 99%

Compositional Characteristics of Sulfur-Containing Compounds in High Sulfur Coals

Zhao

Tang

et al. 2014

Energy Exploration & Exploitation

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The geochemistry of high-organic-sulfur coals of different ranks from three coalfields in China, Chenxi, Hunan Province, Guiding, Guizhou Province, and Hedong, Shanxi Province have been studied using Soxhlet extraction, gas chromatography and gas chromatography-mass spectrometry. The random vitrinite reflectances of Chenxi, Guiding, and Hedong coals are 0.77%, 1.29% and 1.41%, respectively. Organic sulfur contents, on dry and ash-free basis, are 10.06%, 10.26% and 3.51%, respectively. The S o /S t ratio is 95%, 93% and 87%, respectively. Three types of sulfur-containing compounds were identified in coals, dibenzothiophene series, benzonaphthothiophene series, and benzobisbenzothiophene series. No benzobisbenzothiophene series was identified in the Guiding and Hedong coal. As the coal rank of a sample increased, so did the content of dibenzothiophene series; in contrast, the benzonaphthothiophene series showed a decreasing trend. The substituent group was mainly methyl. The coal-forming environments, organic sulfur contents and coal rank all played an important role in the types of organic sulfur-containing compounds.

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“…13,14 The most information concerning the nature of organosulfur constituents in coal and coal-derived products has been provided by pyrolysis-gas chromatography-high-resolution mass spectrometry (Py-GC-HRMS), 15 low-voltage high-resolution mass spectrometry (LV-HRMS), 16,17 and gas chromatography (GC) combined with different detectors such as those for mass spectroscopy (MS), flame photometric detection (FPD), and atomic emission detector (AED). 14,18,19 The extraction process of a coal sample is most often conducted in a Soxhlet apparatus. Different organic solvents were used for this purpose, e.g., toluene, pyridine, ethylenediamine, tetrahydrofuran (THF), and others.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Sulfur Functionalities of Supercritical Extracts from Coals of Different Rank, Using Reductive Pyrolysis

2004

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The extracts obtained via supercritical fluid extraction (SFE) from three Polish coals of different rank, using toluene, toluene/2-propanol, and toluene/tetrahydrofuran (THF) mixtures, were subjected to reductive pyrolysis to determine their organic sulfur functionalities. The extraction yield was in the range of 11.4-43.1 wt %, depending on the type of solvent and coal. Toluene gave the highest extraction yield for medium-volatile bituminous coal, whereas a toluene/2-propanol mixture was the most effective in the case of lignite. The organic sulfur content in the resultant supercritical extracts amounted to 2.17-3.70 wt %. The atmospheric-pressuretemperature-programmed reduction technique coupled with potentiometric detection of H 2 S (AP-TPR) and mass spectrometry (AP-TPR-MS) were applied to monitor the sulfur-containing compounds. During this reductive pyrolysis, these compounds were hydrogenated to H 2 S at specific and discrete temperature intervals. The H 2 S AP-TPR recovery for supercritical extracts was in the range of 23-65 wt %. The results show that thiols, polysulfides, and/or elemental sulfur have the highest contribution to the detectable sulfur in supercritical extracts by AP-TPR. However, alkyl aryl sulfides, aryl sulfides, and thiophenes are also present in smaller amounts. A toluene/THF mixture, compared to the rest of solvents used, seems to have the greatest extraction ability toward thiols and polysulfides-containing coal fragments. It was proven that the higher rank coal subjected to the SFE, the higher the contribution of thiophenic sulfur into the H 2 S AP-TPR evolution profile in the range of 350-900°C. The use of the AP-TPR setup coupled with a mass spectrometer instead of the potentiometric detection system has revealed the presence of alkanethiols, thiophene, and C 1 -and C 2

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Characterization of extractable organosulfur constituents from Bevier seam coal

Cited by 47 publications

References 4 publications

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Application of mass spectrometry in the characterization of chemicals in coal‐derived liquids

Compositional Characteristics of Sulfur-Containing Compounds in High Sulfur Coals

Characterization of Sulfur Functionalities of Supercritical Extracts from Coals of Different Rank, Using Reductive Pyrolysis

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