Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Shabalin, K. V.; Musin, L. I.; Foss, L. E.; Nagornova, O. A.; Морозов, В. И.; Borisov, D. N.; Yakubov, M. R.

doi:10.1134/s096554412206010x

Cited by 3 publications

(1 citation statement)

References 17 publications

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“…Thus, the action of strong oxidizing agents on petroleum asphaltenes leads to the removal of aliphatic substituents along the perimeter of the polycondensed aromatic nucleus with the formation of carboxyl groups, which is accompanied by the compaction of the spatial structure [ 20 , 29 , 30 ]. These approaches were extended to technogenic asphaltenes ET-A, which were modified by treatment with ammonium persulfate in sulfuric acid (ET-Ox1) and acetic acid (ET-Ox2).…”

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confidence: 99%

Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin

et al. 2023

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The low thermal conductivity of paraffin and other organic phase change materials limits their use in thermal energy storage devices. The introduction of components with a high thermal conductivity such as graphene into these materials leads to an increase in their thermal conductivity. In this work, we studied the use of inexpensive carbon fillers containing a polycyclic aromatic core, due to them having a structural similarity with graphene, to increase the thermal conductivity of paraffin. As such fillers, technogenic asphaltenes isolated from ethylene tar and their modified derivatives were used. It is shown that the optimal concentration of carbon fillers in the paraffin composite, which contributes to the formation of a structural framework and resistance to sedimentation, is 5 and 30 wt. %, while intermediate concentrations are ineffective, apparently due to the formation of large aggregates, the concentration of which is insufficient to form a strong framework. It has been found that the addition of asphaltenes modified with ammonium persulfate in acetic acid significantly increases the thermal conductivity of paraffin by up to 72%.

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Section: Resultsmentioning

confidence: 99%

Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin

et al. 2023

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Kinetic Regularities of the Kabachnik–Fields Reaction under Catalysis by Sulfonic Cation Exchangers Based on Petroleum Asphaltenes

et al. 2022

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Asphaltenes from Ethylene Tar as a Potential Raw Material to Obtain High Value-Added Products

Borisova,

Minzagirova,

Shabalin

et al. 2023

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Ethylene tar is the main byproduct of ethylene synthesis obtained via pyrolysis of hydrocarbon feedstock. With the growing demand for ethylene, the efficient use of ethylene tar is of great importance from both an economic and an ecological point of view. It contains significant amounts of polycyclic aromatic hydrocarbons, which can be designated as technogenic asphaltenes. Such polyaromatic structures can be isolated and used as a synthetic platform for modification and molecular engineering, similar to petroleum asphaltenes. In this study, the possibility of modifying technogenic asphaltenes by oxidizing reagents used previously for petroleum asphaltenes was shown for the first time. Technogenic asphaltenes contain significantly fewer heteroatomic structures and have a lower molecular weight compared to petroleum asphaltenes. The compositional features of technogenic asphaltenes ensure deeper oxidation with the formation of various O-containing products, whose properties can vary significantly depending on the reaction conditions. At the same time, the general patterns of oxidative modification of technogenic asphaltenes correspond to the oxidation processes of petroleum asphaltenes. The modification products obtained in this way can be used as sorbents, catalysts, fillers for polymers, adhesive additives for road bitumens, etc.

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Preparation of Redox Ion-Exchange Materials Based on Petroleum Asphaltenes

Cited by 3 publications

References 17 publications

Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin

Modified Technogenic Asphaltenes as Enhancers of the Thermal Conductivity of Paraffin

Kinetic Regularities of the Kabachnik–Fields Reaction under Catalysis by Sulfonic Cation Exchangers Based on Petroleum Asphaltenes

Asphaltenes from Ethylene Tar as a Potential Raw Material to Obtain High Value-Added Products

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