Composition of gas from pyrolysis of Estonian oil shale with various sweep gases

Baird, Zachariah; Järvik, Oliver; Mozaffari, Sepehr

doi:10.3176/oil.2021.3.03

Cited by 3 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Organic matter mainly exists in the form of kerogen in low maturity organicrich shale, and the bottleneck to its utilization is how to accelerate the conversion of kerogen into oil and gas [1,2]. The presence of water brings many changes to the hydrocarbon generation of organic-rich shale [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the hydrocarbon generation of low maturity organic-rich shale in supercritical water

Dong¹,

Guo²,

Jin³

et al. 2022

View full text Add to dashboard Cite

In this study, the hydrocarbon generation of 1-4 cm sized shale in supercritical water (SCW) was investigated. The results showed that temperature was the most important factor affecting the hydrocarbon generation of organic-rich shale in the presence of supercritical water. In the temperature range of 380-450 °C, the optimum oil generation temperature was 430 °C. The produced oil component became heavier with increasing temperature. Increasing temperature was beneficial to gas production and improved the selectivity of H 2 and CH 4 . In the pressure range of 22.5-27.5 MPa, oil and gas production decreased with increasing pressure. The influence of pressure on conversion path was almost negligible. Pressure affected the hydrocarbon generation of shale in supercritical water by affecting hydrocarbon expulsion. In the water-shale mass ratio range of 0.5-5 and the reaction time range of 1-12 h, increasing both parameter ranges was conducive to the hydrocarbon generation of oil shale. The selectivity of H 2 increased and that of CH 4 and CO 2 decreased with increasing water-shale mass ratio. The selectivity of CH 4 and C 2 H 6 increased with increasing reaction time.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the hydrocarbon generation of low maturity organic-rich shale in supercritical water

Dong¹,

Guo²,

Jin³

et al. 2022

View full text Add to dashboard Cite

show abstract

Sulfur in kukersite shale oil: its distribution in shale oil fractions and the effect of gaseous environment

Mozaffari

Baird

Järvik

2022

J Therm Anal Calorim

View full text Add to dashboard Cite

Co-Pyrolysis of Woody Biomass and Oil Shale—A Kinetics and Modelling Study

Lyons Ceron,

Ochieng,

Sarker

et al. 2024

Energies

View full text Add to dashboard Cite

The co-pyrolysis of biomass and fossil fuels has been the subject of studies on sustainable energy. Co-feeding oil shale with woody biomass can contribute to a transition into carbon neutrality. The present study analysed the thermal decomposition behaviour of oil shale and biomass blends (0:1, 3:7, 1:1, 7:3, 9:1, and 1:0) through thermogravimetric analysis (TGA) at 80–630 °C with a heating rate of 10 °C/min in CO2 and N2 atmospheres. A comparison of theoretical and experimental residual mass yields of oil shale–biomass mixtures indicated no significant interactions between the fuels. The blends contributed to a decrease of up to 34.4 wt% in solid residues compared to individual pyrolysis of oil shale, and the TGA curves were shifted from up to 10 °C to a lower temperature when the biomass ratio increased. The use of a CO2 atmosphere resulted in the production of solid residues, comparable to the one obtained with the N2 atmosphere. CO2 atmosphere can be used in oil shale–biomass co-pyrolysis, without affecting the decomposition process or increasing the yield of residues. A kinetic model method is proposed based on TGA data at 10, 20, and 30 °C/min. The apparent activation energies for a temperature range of 200–520 °C were in the order of 139, 155, 164, 197, 154, and 167 kJ/mol for oil shale–biomass 0:1, 3:7, 1:1, 7:3, 9:1, and 1:0 blends, respectively. From the isoconversional kinetic analysis, a two-stage pyrolysis was observed, which separated biomass and oil shale pyrolysis. A simulation of biomass and oil shale co-pyrolysis was conducted in Aspen Plus® using TGA-derived kinetic data. The model prediction resulted in a close match with the experimental thermogravimetric data with absolute errors from 1.75 to 3.78%, which highlights the relevance of TGA analysis in simulating co-pyrolysis processes.

show abstract

Composition of gas from pyrolysis of Estonian oil shale with various sweep gases

Cited by 3 publications

References 14 publications

Experimental investigation on the hydrocarbon generation of low maturity organic-rich shale in supercritical water

Experimental investigation on the hydrocarbon generation of low maturity organic-rich shale in supercritical water

Sulfur in kukersite shale oil: its distribution in shale oil fractions and the effect of gaseous environment

Co-Pyrolysis of Woody Biomass and Oil Shale—A Kinetics and Modelling Study

Contact Info

Product

Resources

About