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Internal heat transfer characteristics of large-particle oil shale during pyrolysis

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Abstract

A 2D cylinder transient heat transfer model was developed for single-particle oil shale pyrolysis in the fixed-bed reactor. Variations of physical properties of oil shale were considered in this model. The developed model was solved using ANSYS after determining boundary conditions. And then intraparticle temperature distribution was obtained during oil shale pyrolysis. Moreover, effects of particle size and heating rate on intraparticle temperature distribution were investigated. The radius of 30-mm oil shale and pyrolysis time were divided into ten equal intervals to calculate temperature at any time and any position during the sample pyrolysis. The calculated results reasonably agreed with actually measured temperature.

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Abbreviations

\(C_{\text{p}}\) :

Heat capacity (J kg−1 K−1)

\(E_{\text{s}}\) :

Internal heat sink (J m−3)

k :

Heat conductivity coefficient of oil shale (W m−1 K−1)

t :

Heating time (s)

T :

Temperature (K)

\(T_{0}\) :

Initial temperature (K)

\(T_{\text{c}}\) :

Central temperature of oil shale (K)

\(T_{\text{f}}\) :

Gaseous temperature (K)

\(T_{\text{s}}\) :

Surface temperature of oil shale (K)

r :

Radius of oil shale particle (m)

α :

Convective heat transfer coefficient (W m−2 K−1)

β :

Heating rate (K min−1)

\(\rho_{\text{o}}\) :

Density of oil shale (kg m−3)

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Acknowledgements

This project was funded by national basic research program of china (973 programs) (2014CB744302) and China university of petroleum (Beijing) scientific research fund (2462015YQ0601).

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Authors and Affiliations

  1. State Key Laboratory of Heavy Oil Processing, College of Science, China University of Petroleum-Beijing, Beijing, 102249, China

    Yue Ma, Yukai Zhu, Shuyuan Li, Jian Shi, Jili Hou & Luchao Zhang

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  1. Yue Ma
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  2. Yukai Zhu
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  3. Shuyuan Li
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  4. Jian Shi
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  5. Jili Hou
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  6. Luchao Zhang
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Correspondence to Shuyuan Li.

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Ma, Y., Zhu, Y., Li, S. et al. Internal heat transfer characteristics of large-particle oil shale during pyrolysis. J Therm Anal Calorim 135, 3429–3435 (2019). https://doi.org/10.1007/s10973-018-7622-z

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