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Title: Fractal description and adsorption-desorption behaviour of coke treated by benzene pyrolysis carbons

Authors: Zezhi Zhang

Addresses: School of Chemistry and Environment, Henan Institute of Education, Zhengzhou, 450046, China

Abstract: For explaining why benzene pyrolysis carbons could inhibit coke deterioration in blast furnace, the adsorption-desorption data of coke sample treated by benzene pyrolysis carbons were obtained to establish adsorption-desorption isotherms and to fit fractal description model with Frenkel-Halsey-Hill equation. The SEM photographs of coke revealed that the pores of the infiltrated coke were almost filled with pyrolysis carbon particles. The fitted curves showed that the types of isotherms were similar to 'type II' of IUPAC classification, and the hysteresis loops belonged to type H3 which represents a typical multilayer adsorption. Model tests indicated that the pore structure of the coke samples have obvious fractal feature and the fractal dimensions of coke sample treated by benzene pyrolysis carbons were smaller than that of original coke sample. So, it explained that benzene pyrolysis carbons can effectively inhibit coke deterioration by infiltrating into the pore structure of coke and reducing pore roughness.

Keywords: coke; inhibition deterioration; benzene pyrolysis carbons; adsorption-desorption; fractal description.

DOI: 10.1504/IJNM.2020.104477

International Journal of Nanomanufacturing, 2020 Vol.16 No.1, pp.21 - 28

Received: 09 Jun 2017
Accepted: 25 Dec 2017

Published online: 19 Dec 2019 *

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