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Solid Fuel Chemistry

, Volume 53, Issue 3, pp 135–144 | Cite as

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

  • V. A. SaberovaEmail author
  • Yu. V. TamarkinaEmail author
  • V. A. KucherenkoEmail author
Article

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.

Keywords:

brown coal alkaline activation solid products structure 

Notes

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Copyright information

© Allerton Press, Inc. 2019

Authors and Affiliations

  1. 1.Litvinenko Institute of Physical Organic Chemistry and Coal Chemistry, National Academy of Sciences of UkraineKievUkraine

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