The assessment of maturation changes of humic coal organic matter — Insights from closed-system pyrolysis experiments

Vuković, Nikola; Životić, Dragana; Filho, João Graciano Mendonça; Kravić-Stevović, Tamara; Hámor-Vidó, Mária; Mendonça, Joalice de Oliveira; Stojanović, Ksenija

doi:10.1016/j.coal.2016.01.007

Cited by 34 publications

(29 citation statements)

References 79 publications

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“…Benzo[b]naphtho[d]furans (BNFs) have been identified in oils, condensates, source-rocks, coals and coaly shales, being more abundant in the latter. We detected BNFs (m/z 218) in relatively high amounts in the aromatic fractions of pyrolysates of brown coals which attained the maturity corresponding to vitrinite reflectance of 1.80 %Rr [2]. This result suggests that BNFs can be attractive for investigations of mature fluids that originate from gas/condensate prone sources, rich in type III kerogen, which are usually depleted in biomarkers.…”

Section: Doi: 1017223/9785946217408/422mentioning

confidence: 78%

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The Review of Some Novel Biomarkers in Sedimentary Organic Matter

2018

Perspektivnye Materialy S Ierarkhicheskoy Strukturoy Dlya Novykh Tekhnologiy I Nadezhnykh Konstruktsiy» I «Khimiya Nefti I Gaza

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Section: Doi: 1017223/9785946217408/422mentioning

confidence: 78%

“…THE REVIEW OF SOME NOVEL BIOMARKERS IN SEDIMENTARY ORGANIC MATTER 1 Stojanović K., 2 Nytoft H.P., 3 Kildahl-Andersen G., 4 Vuković N. 1 [1]. They differ from regular benzohopanes by the presence of methyl group in position C-31.…”

Section: Doi: 1017223/9785946217408/422mentioning

confidence: 99%

The Review of Some Novel Biomarkers in Sedimentary Organic Matter

2018

Perspektivnye Materialy S Ierarkhicheskoy Strukturoy Dlya Novykh Tekhnologiy I Nadezhnykh Konstruktsiy» I «Khimiya Nefti I Gaza

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“…The coal samples from Kostolac coalfield had up to 2 % of sulphur, and the extracted amount was small, meaning that most of the sulphur was insoluble in water. 15 This is expected, since sulphur in coal exists as inorganic and organic sulphur components. The major inorganic sulphur compound in coal is pyrite; organic sulphur compounds are diverse and contain mainly thiol, sulphide, disulfide and thiophene groups.…”

Section: Determination Of Anions In Coalmentioning

confidence: 98%

“…The major inorganic sulphur compound in coal is pyrite; organic sulphur compounds are diverse and contain mainly thiol, sulphide, disulfide and thiophene groups. 15,16 Changes in pH value and conductivity of the extraction suspension as a function of sonication time are shown in Fig. 2.…”

Section: Determination Of Anions In Coalmentioning

confidence: 99%

Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination

Tasic

Sredovic-Ignjatovic

Ignjatović

et al. 2016

JSCS

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Three different techniques were applied for the aqueous extraction of anions from coal and fly ash: rotary mixer-and ultrasonic-assisted extraction with different duration time, and microwave-assisted extraction at different temperatures. Validation showed that the ion-chromatographic method was suitable for the analysis of anions in coal and fly ash extracts. The variations in the amounts of anions using different extraction times during rotary-assisted extraction were minimal for all investigated anions. The efficiency of ultrasound-assisted extraction of anions from coal depended on the sonication time and was highest at 30 min. The ultrasound-assisted extraction was less efficient for the extraction of anions from fly ash than rotary-assisted extraction. Increase of temperature in the microwave-assisted extraction had a positive effect on the amounts of all anions extracted from coal and sulphate from fly ash, while the amounts of fluoride and chloride in fly ash extracts decreased. The microwave-assisted extraction of coal at 150 °C was compared with standard ASTM methods, and results were in good agreement only for chloride. Changes in the pH value and conductivity during ultrasound-assisted extraction were measured in order to explain changes on the surface of coal particles in contact with water and different processes that occur under environmental conditions.

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“…Detailed description of this analysis is given in the previous publications. 25,26 The solid residues obtained from both pyrolyses were dried and weighed. The yield of gas was calculated as: 100 % -(yield of shale oil + yield of solid residue).…”

mentioning

confidence: 99%

The influence of pyrolysis type on shale oil generation and its composition (upper layer of Aleksinac oil shale, Serbia)

Gajica

Šajnović

Stojanović

et al. 2017

JSCS

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The influence of pyrolysis type on the shale oil generation and its composition was studied. Different methods such as Rock-Eval pyrolysis, thermogravimetric analysis (TGA) and pyrolysis in the open and closed systems were applied. Samples from the Upper layer of Aleksinac oil shale (Serbia) were used as a substrate and first time characterized in detail. The impact of kerogen content and type on the shale oil generation in different pyrolysis systems was also estimated. Majority of the analysed samples have total organic carbon content > 5 wt. % and contain oil prone kerogen types I and/or II. Therefore, they can be of particular interest for the pyrolytic processing. The thermal behaviour of analysed samples obtained by TGA is in agreement with Rock-Eval parameters. The pyrolysis of oil shale in the open system gives higher yield of shale oil than the pyrolysis in the closed system. The yield of hydrocarbons (HCs) in shale oil produced by the open pyrolysis system corresponds to an excellent source rock potential, while HCs yield from the closed system indicates a very good source rock potential. The kerogen content has a greater impact on the shale oil generation than kerogen type in the open pyrolysis system, while kerogen type plays a more important role on the generation of shale oil than the kerogen content in the closed system. The composition of the obtained shale oil showed certain undesirable features, due to the relatively high contents of olefinic HCs (open system) and polar compounds (closed system), which may require further treatment to be used.

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The assessment of maturation changes of humic coal organic matter — Insights from closed-system pyrolysis experiments

Cited by 34 publications

References 79 publications

The Review of Some Novel Biomarkers in Sedimentary Organic Matter

The Review of Some Novel Biomarkers in Sedimentary Organic Matter

Aqueous extraction of anions from coal and fly ash followed by ion-chromatographic determination

The influence of pyrolysis type on shale oil generation and its composition (upper layer of Aleksinac oil shale, Serbia)

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