Examination of molecular weight distributions of primary pyrolysis oils from three different oil shales via direct pyrolysis Field Ionization Spectrometry

Oja, Vahur

doi:10.1016/j.fuel.2015.07.041

Cited by 14 publications

(17 citation statements)

References 34 publications

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“…The main stage of mineral decomposition requires the temperatures above 600 °C. [10][11][12]14 The obtained results indicate that only the bituminous marlstone samples D4, D6 and D7 have a greater loss of weight at temperatures up to 300 °C, than at temperatures of the main stage of the decomposition of kerogen (Figs. 2 and 3).…”

Section: Thermal Behavior Of Oil Shalementioning

confidence: 86%

“…2,10,12 Generally, the temperature range between 300 to 600 °C is considered as the main stage of decomposition of OM, and the weight loss occurred mainly due to the volatalisation of bitumen and the decomposition of kerogen and bitumen, that leads to the release of low molecular weight volatiles and the formation of char. 10,11,14,41 In this temperature range the mineral decomposition contributes to a lesser degree. The main stage of mineral decomposition requires the temperatures above 600 °C.…”

Section: Thermal Behavior Of Oil Shalementioning

confidence: 96%

“…[7][8][9] Thermogravimetric analysis (TGA) is used to measure the loss weight of a sample due to the thermal decomposition and the devolatilisation of OM with the temperature rise is aimed to determine kinetic parameters and to predict thermal behaviour of oil shale. 2,4,[10][11][12][13][14] Pyrolysis in an open and a closed system can be used for the simulation of OM maturity changes and the evaluation of hydrocarbon potential in more detail. In difference to Rock--Eval and TGA, these pyrolysis types enable determination of the composition of pyrolysis products.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Thermal Behavior Of Oil Shalementioning

confidence: 86%

Section: Thermal Behavior Of Oil Shalementioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Therefore, at the temperature-time point at which thermobitumen is completely decomposed or vanished, its average molecular weight values should approach those of volatile oil. The Kukersite oil shale's oil molecular weight distribution curves, which come from various pyrolysis regimes, can be found in earlier articles [31,35,36].…”

Section: The Molecular Weight Of Thermobitumenmentioning

confidence: 99%

Yields and the selected physicochemical properties of thermobitumen as an intermediate product of the pyrolysis of Kukersite oil shale

Albert¹,

Astra²,

Järvik³

et al. 2021

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“…The samples were obtained from Narva Oil Plant of Eesti Energia (Estonia) that uses solid heat carrier technology [24][25][26]. As total shale oil has a wide range of properties and components [27][28][29][30], then in industry the oil was divided into wide "straightrun fractions" as preliminary products [13]. In this study, one gasoline "straight-run fraction", four middle oil (fuel oil) "straight-run fractions" and one artificially modified (concentrated) fuel oil fraction were used.…”

Section: Samplesmentioning

confidence: 99%

Astm D86 Distillation in the Context of Average Boiling Points as Thermodynamic Property of Narrow Boiling Range Oil Fractions

Rannaveski¹,

Listak²,

Oja³

2018

Oil Shale

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The average boiling points (ABPs) of narrow boiling range oil distillation cuts are important in predicting thermodynamic and physical properties of oils. Due to convenience, simple batch distillation methods, either at atmospheric or reduced pressure, are often used to separate shale oils into fractions, including narrow boiling range fractions, and it has been attempted to calculate average boiling points directly from the distillation data. Using wide industrial shale oil fractions from Estonian kukersite oil shale and based on ASTM "Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure" (ASTM D86), this paper is aimed to find out how much the average boiling points determined directly from distillation, as an arithmetic average of the initial and final temperatures of the thermometer during fractions collection, differ from actual average boiling points (AABPs). The actual average boiling points of narrow boiling range oil fractions, pre-prepared by the same ASTM D86 distillation, were measured afterwards using a recently developed thermogravimetric analysis (TGA) based experimental method, which requires only about 20 mg of sample. The study indicated that AABPs were always lower than the respective average values determined directly from ASTM D86 distillation data.

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Examination of molecular weight distributions of primary pyrolysis oils from three different oil shales via direct pyrolysis Field Ionization Spectrometry

Cited by 14 publications

References 34 publications

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

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

Yields and the selected physicochemical properties of thermobitumen as an intermediate product of the pyrolysis of Kukersite oil shale

Astm D86 Distillation in the Context of Average Boiling Points as Thermodynamic Property of Narrow Boiling Range Oil Fractions

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