Co-Liquefaction of Kukersite Oil Shale and Pine Wood in Supercritical Water

Veski, R.; Palu, Vilja; Kruusement, Kristjan

doi:10.3176/oil.2006.3.04

Cited by 15 publications

(11 citation statements)

References 17 publications

(10 reference statements)

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“…In this work, the mathematical model proposed above was elaborated and proved taking experimental data from [26] where the results concerning copyrolysis of oil shale (50.5% OM d , 12.8% CO 2 d min , 37.2% A d , and 0.6% hygroscopic water) and pine wood (99.6% OM d , 0.4% A d and 9.1% hygroscopic water) were published for the first time. The liquefaction was carried out under conditions of supercritical water, heating up during 110 min to 380 °C, and duration at the nominal temperature of 4 hours.…”

Section: Methodsmentioning

confidence: 99%

“…Veski et al [26] have investigated the co-pyrolysis of Estonian oil shale Kukersite and pine wood (0, 25, 54, 75 and 100% of BM in the blend on OM basis) in supercritical water (380 °C, 4 h). It was found that the yields of different extraction fractions of oil were 1.5-1.9 times higher, and the yields of gas, water and solid residue 0.5-0.8 times lower than the corresponding additive values.…”

Section: Co-pyrolysis Of Oil Shales With Pl and Bmmentioning

confidence: 99%

“…The mathematical approach proposed is explained and proved based on the experimental data published earlier by Veski, Palu and Kruusement [26].…”

Section: Co-pyrolysis Of Oil Shales With Pl and Bmmentioning

confidence: 99%

“…Much attention has been paid to the co-pyrolysis of fossil fuels with biomass (BM) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] and plastic wastes (PL) [15][16][17][18][19][20][21][22][23][24][25][26] with the aim to expand the crude resources and flexibility, to improve the composition of liquid products, and to advance environmental sustainability.…”

Section: Introductionmentioning

confidence: 99%

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A Synergy Code in Co-Pyrolysis

Johannes¹,

Palu²

2013

Oil Shale

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For the first time, a mathematical model has been proposed to describe the influence of blending ratio on the synergy in co-pyrolysis. The model is based on the stability of a new cross-compound A n B formed between the pyrolysis products of the blend components. A new characteristic, named synergy factor (δ), has been introduced to express the synergy formula. The value of δ and synergy in oil yield are positive when A n B is volatile or soluble in the solvents applied for oil separation. As an example, the model deduced was proved in the mathematical processing of earlier published experimental results on the co-pyrolysis of oil shale and pine wood in supercritical water at 380 °C during 4 hours. The values of δ were estimated for the subsequent distribution of the pyrolysate into water extract (including ether soluble and insoluble extracts), water insoluble oil (including benzene and acetone extracts), solid residue, and gas and pyrogenetic water.

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Section: Methodsmentioning

confidence: 99%

Section: Co-pyrolysis Of Oil Shales With Pl and Bmmentioning

confidence: 99%

“…The mathematical approach proposed is explained and proved based on the experimental data published earlier by Veski, Palu and Kruusement [26].…”

Section: Co-pyrolysis Of Oil Shales With Pl and Bmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Synergy Code in Co-Pyrolysis

Johannes¹,

Palu²

2013

Oil Shale

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“…It is this difference that makes the hydrocarbon generation of LMOS under a supercritical water atmosphere different from that under anhydrous, normal and sub-critical water conditions. Veski et al found that the polar component content of oil shale, pine, and supercritical water co-thermal oil production was higher than that of oil produced from single shale. Funazukuri et al .…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Organic Carbon Migration Path and Pore Evolution during Co-thermal Hydrocarbon Generation of Low Maturity Organic-Rich Shale and Supercritical Water

et al. 2022

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In this study, a non-isothermal heating reactor was used to simulate the hydrocarbon generation of 1−4 cm-sized low maturity organic-rich shale under the action of supercritical water. Under the condition of maintaining a pressure of 24 MPa, a mass ratio of water to shale 1:1, and a total reaction time of 2.5 h, the effects of different temperature conditions (380−450 °C) on hydrocarbon generation efficiency, organic carbon migration ratio, and pore permeability characteristics were investigated. The results showed that the oil production rate first increased and then decreased, and gas production rate continued to increase with increasing temperature. In the range of 380−450 °C, the oil production rate reached a maximum of 4.2 kg oil•t −1 shale at 430 °C, and the gas production rate reached a maximum of 36.02 m 3 gas•t −1 shale at 450 °C. Increasing temperature would promote the increase in the relative content of heavy components in oil. The selectivity of hydrogen and methane was promoted, while carbon dioxide was inhibited by increasing temperature. The distribution proportion of organic carbon in the oil-phase products and wastewater gradually decreased, while the distribution proportion in the gas-phase products increased with the increase in temperature. The porosity, permeability, and specific surface area of shale all increased with the increase in temperature. The increase in porosity caused by increasing temperature less than 430 °C was attributed to the fact that increasing temperature promotes the conversion and release of organic matter and the development of microfractures. The increase in porosity by increasing temperature more than 430 °C was only due to the development of microfractures.

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Production of Chemicals in Supercritical Water

Matsumura

Yong

2014

Biofuels and Biorefineries

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Supercritical water (SCW) is expected to be a green solvent for dissolving substances, for chemical synthesis, or for chemical reactions, and thus various study has been carried out. Production of chemicals has been found possible in SCW. This chapter reviews the chemical production in terms of feedstocks and reactions. The feedstocks can include biomass (cellulose, hemicellulose and lignin), plastics, other wastes (e.g., tire, rubber), inorganics and waste water. The reactions include SCW gasification (where hydrolysis and pyrolysis take important roles), SCW oxidation, depolymerization, precipitation, hydrothermal synthesis, other organic reactions for synthesis of chemicals. In these reactions, roles of H 2 O are: (1) Reactant/product (hydrolysis, hydration, hydrogen source and freeradical chemistry) or catalyst (Acid/base catalyst precursor and catalyst in the transition state); (2) Intermolecular interactions in high temperature water: Solvation effects (effects of preferential solvation, hydrophobicity and solvent dynamics) and density inhomogeneity effects (ions, organic compounds, noble gases and radicals); (3) Medium: Energy transfer, diffusion and solvent cages and phase behavior. However, low selectivity and yield and high production cost are barriers for the commercialization of production of chemicals in SCW.

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Co-Liquefaction of Kukersite Oil Shale and Pine Wood in Supercritical Water

Cited by 15 publications

References 17 publications

A Synergy Code in Co-Pyrolysis

A Synergy Code in Co-Pyrolysis

Experimental Investigation on the Organic Carbon Migration Path and Pore Evolution during Co-thermal Hydrocarbon Generation of Low Maturity Organic-Rich Shale and Supercritical Water

Production of Chemicals in Supercritical Water

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