Authors: KozlovA.P., ZykovI.Yu., DudnikovaYu.N., TsvetkovV.E. , FedorovaN.I., Z.R. Ismagilov

Title of the article: Influence of alkaline activation temperature on porosity characteristics of sorbents based on brown coal

Year: 2018, Issue: 5, Pages: 68-75

Branch of knowledge: Chemical technology

Index UDK: 547.992.2:662.73

DOI: 10.26730/1999-4125-2018-5-68-75

Abstract: The influence of the temperature of brown coal of Tisul field alkaline activation on the porous structure formation of produced sorbents was investigated. Sorbents were obtained at activation temperatures of 700°C, 750°C and 800°C. The homogenization of the coal alkaline mixture was carried out by impregnation. The KOH/coal mass ratios (RKOH) were 0.5 g/g; 1 g/g and 2 g/g. Porosity characteristics of carbon sorbents were investigated with the ASAP-2020 analyzer. It is shown that the alkaline activation temperature has a lesser effect on the characteristics of the sorbents compared to the amount of potassium hydroxide used. The effect of temperature has a greater impact on the pores formation during alkaline activation at the KOH/coal mass ratio 1 g/g. Sorbents with a maximum meso-pores volume were obtained at the temperature 750°C. The high-temperature alkaline activation (800°C) has a positive influence on the formation of a common porous space of sorbents based on the brown coal of Tisul field for all RKOH.

Key words: carbon sorbents brown coal alkaline activation activation temperature porous structure

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