Abstract: e report on petroleum asphalt–based porous carbons with high textural characteristics, CO2/N2 adsorption capacity and selectivity. A series of samples was prepared by a two-stage method, including preliminary heat treatment of asphalt at 450°C and KOH activation. The activation temperature varied from 700 to 900°C. Correlation between the porous structure and adsorption properties of asphalt-based porous carbons on the activation temperature was obtained. The activation temperature of petroleum asphalt has a significant effect on the porous structure of the activated carbon materials. Thus, exclusively microporous sample is formed at the temperature of 700 °С. An increase in the activation temperature to 800°C leads to the formation of mesopores. The decrease in textural characteristics due to the formation of more stable carbon structures to gasification reactions takes place at a temperature of 900 °С. In addition, the adsorption capacity of CO2 was measured for carbon samples. The porous carbon activated at 700 °C and derived from petroleum asphalt exhibited high CО2 adsorption capacity of 6.3 mmol/g at 0 °C and 1 atm and good selectivity for CO2 over N2, indicating possible applications in CO2 capture technology.

Cite: Gorbunova O.V. , Baklanova O.N. , Gulyaeva T.I. , Trenikhin M.V.
Effect of activation temperature on porous structure of carbon derived from petroleum asphalt
AIP Conference Proceedings. 2023. V.2784. N1. 020008-1 :1-7. DOI: 10.1063/5.0140541 Scopus OpenAlex

Dates:

Submitted:	Dec 28, 2022
Accepted:	Feb 17, 2023
Published print:	Jul 26, 2023
Published online:	Jul 26, 2023

Identifiers:

Scopus:	2-s2.0-85176778610
OpenAlex:	W4385270740

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