Structure formation in binary systems hydrolysis lignin – oil product and thermochemical transformations of composites on their basis

Authors

  • Ivan V. Reznikov Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus https://orcid.org/0000-0003-1109-9053 (unauthenticated)
  • Tatyana A. Savitskaya Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus
  • Dmitry D. Grinshpan Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

Keywords:

hydrolysis lignin, oil products, structure, machine learning, activated carbon, rheology

Abstract

Rheological properties of hydrophobized hydrolysis lignin dispersions in tank oil, diesel fuel, and industrial oil were under study. It was found that at the hydrolysis lignin content of more than 20 wt. %, a coagulation-thixotropic structure with a pseudoplastic flow pattern is formed. The parameters of structure formation calculated within the theory of elastic flocks made it possible to characterize dispersions in diesel fuel as least structured. In accordance with the theory of diffusion-limited aggregation, a computer model of the aggregate of hydrolytic lignin particles in diesel fuel was calculated and its internal structure was established using the proposed method of computer analysis of digital photographs. Machine learning was used to predict the optimal conditions for the production of mesoporous activated carbons from hydrolysis lignin. Experimentally obtained carbons are characterized by total pore volume of (0.95 ± 0.05) cm3/g and BET surface area of (1700 ± 85) m2/g, that corresponds to the predicted parameters.

Author Biographies

  • Ivan V. Reznikov, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

    postgraduate student at the department of physical chemistry, faculty of chemistry

  • Tatyana A. Savitskaya, Belarusian State University, 4 Niezaliežnasci Avenue, Minsk 220030, Belarus

    PhD (chemistry); professor at the department of physical chemistry and deputy dean for research, faculty of chemistry

  • Dmitry D. Grinshpan, Research Institute for Physical Chemical Problems, Belarusian State University, 14 Lieninhradskaja Street, Minsk 220006, Belarus

    doctor of science (chemistry), full professor; head of the laboratory of cellulose solutions and products of their treatment

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Published

2020-03-05

How to Cite

[1]
Reznikov, I.V. et al. 2020. Structure formation in binary systems hydrolysis lignin – oil product and thermochemical transformations of composites on their basis. Journal of the Belarusian State University. Chemistry. 1 (Mar. 2020), 3–18. DOI:https://doi.org/10.33581/2520-257X-2020-1-3-18.