Characterization of oil shale pore structure before and after pyrolysis by using X-ray micro CT

Tiwari, Pankaj; Deo, Milind; Lin, C.L.; Miller, Jan D.

doi:10.1016/j.fuel.2013.01.006

Cited by 260 publications

(132 citation statements)

References 19 publications

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“…Vernik, 1994) and X-raytomography showed fracturing of organic-rich shales during pyrolysis (Kobchenko et al, 2011;Panahi et al, 2014;Tiwari et al, 2013), the impact of cracks on the porosity of our studied samples is also small, especially when we take into account that most of the cracks in the mature sample are along organic-matter-mineral interfaces which might be an artifact because of devolatilization. Still, these weaker zones can be indicative for the preferred pathways for transport and they suggest a preferred transport pathway sub-parallel to the bedding (Fig.…”

Section: Storage Capacity and Transport Propertiesmentioning

confidence: 84%

BIB-SEM pore characterization of mature and post mature Posidonia Shale samples from the Hils area, Germany

Klaver

Desbois

Littke

et al. 2016

International Journal of Coal Geology

134

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Section: Storage Capacity and Transport Propertiesmentioning

confidence: 84%

BIB-SEM pore characterization of mature and post mature Posidonia Shale samples from the Hils area, Germany

Klaver

Desbois

Littke

et al. 2016

International Journal of Coal Geology

134

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“…Compared with the char bed the oil shale bed obviously had higher resistance to the gas flow, showing that the oil shale char from pyrolysis is also more porous than the original shale particles. Using an X-ray micro CT scanner Tiwari et al [25] found that decomposition of organic matters in oil shale produced void spaces. The result indicates that in an indirectly heated fixed bed pyrolyzer without the central gas collection pipe (e.g., reactors A and C), the generated pyrolysis products would counter flow into the outer char layer next to the bed wall where the temperature is high [23].…”

Section: Advanced Pyrolysis By Internalsmentioning

confidence: 99%

Pyrolysis in indirectly heated fixed bed with internals: The first application to oil shale

Lin

Chun

et al. 2015

Fuel Processing Technology

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“…Some scholars, based on the combination of CT technology and three-dimensional reconstruction, studied the structure of microscale pore clusters during oil shale pyrolysis [38], the consistency of thermal weight loss and porosity [39], and estimation of permeability [40]. Yang et al [41] quantitatively characterized the pore structure during pyrolysis by mercury intrusion porosimetry (MIP).…”

Section: Introductionmentioning

confidence: 99%

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

Liu

Yang

et al. 2018

Energies

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The evolution of pore structure during in situ underground exploitation of oil shale directly affects the diffusion and permeability of pyrolysis products. In this study, on the basis of mineral analysis and thermogravimetric results, in combination with the low-pressure nitrogen adsorption (LPNA) and mercury intrusion porosimetry (MIP) technique, the evolution of pore structure from 23 to 650 • C is quantitatively analyzed by simulating in situ pyrolysis under pressure and temperature conditions. Furthermore, based on the experimental results, we analyze the mechanism of pore structure evolution. The results show the following: (1) The organic matter of Fushun oil shale has a degradation stage in the temperature range of 350-540 • C, and there is no obvious temperature gradient between decomposition of kerogen and the secondary decomposition of bitumen. The thermal response mechanisms of organic matter and minerals are different in each temperature stage, and influence the change of pore structure. (2) Significant changes occur in pore shape at 350 • C, where thermal decomposition of kerogen begins. The ink-bottle pores are dominant when the temperature is less than 350 • C, whereas slit pores dominate when the temperature is greater than 350 • C. (3) The change in pore structure of oil shale is much less significant from 23 to 350 • C. The pore volume, porosity, and specific surface area (SSA) of samples increase rapidly with temperature varying from 350 to 600 • C. The variation of each parameter is dissimilated from 600 to 650 • C: the porosity and pore volume increases with a small gradient from 600 to 650 • C, and SSA decreases significantly. (4) The lithostatic pressure does not cause change in the evolution discipline of the pore structure, but the inhibitory effect on the pore development is significant.

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Characterization of oil shale pore structure before and after pyrolysis by using X-ray micro CT

Cited by 260 publications

References 19 publications

BIB-SEM pore characterization of mature and post mature Posidonia Shale samples from the Hils area, Germany

BIB-SEM pore characterization of mature and post mature Posidonia Shale samples from the Hils area, Germany

Pyrolysis in indirectly heated fixed bed with internals: The first application to oil shale

Influence of In Situ Pyrolysis on the Evolution of Pore Structure of Oil Shale

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