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Changing the Structure of Brown Coal by Alkaline Activation with Thermal Shock

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Abstract

The solid thermolysis products (STPs) of brown coal formed upon alkaline activation with thermal shock (TS)—the rapid introduction of coal with KOH into a reactor heated to tTS ≤ 850°С—were studied. It was established that the structural fragmentation of coal (C–O and C–C bond heterolysis) dominated at tTS ≤ 400°С. With an increase in tTS to 850°С, the formation of subnanopores (≤1 nm) occurred simultaneously the growth of polyarenes and their condensation into polyarylenes, and it was limited by the diffusion of KOH (or K) and formed the final porous structure of STPs.

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Authors and Affiliations

  1. Litvinenko Institute of Physical Organic Chemistry and Coal Chemistry, National Academy of Sciences of Ukraine, 02160, Kiev, Ukraine

    V. A. Saberova, Yu. V. Tamarkina & V. A. Kucherenko

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  1. V. A. Saberova
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  2. Yu. V. Tamarkina
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  3. V. A. Kucherenko
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Correspondence to V. A. Saberova, Yu. V. Tamarkina or V. A. Kucherenko.

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Translated by V. Makhlyarchuk

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Saberova, V.A., Tamarkina, Y.V. & Kucherenko, V.A. Changing the Structure of Brown Coal by Alkaline Activation with Thermal Shock. Solid Fuel Chem. 53, 135–144 (2019). https://doi.org/10.3103/S0361521919030091

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  • DOI: https://doi.org/10.3103/S0361521919030091

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