Selective extraction of aromatics from residual oil with subcritical water

Zhu, Meng-Han; Liu, Yin-Dong; Wang, Li-Tao; Huang, Zi-Bin; Yuan, Pei-Qing

doi:10.1016/j.cherd.2024.01.011

Cited by 2 publications

(1 citation statement)

References 36 publications

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“…The study tested different parameters of temperature (200°C, 250°C and 300°C) and extraction time (10, 20 and 30 minutes). The tested range of temperature and pressure is most commonly found as a recommendation for performing the extraction of organic compounds, including PAHs in subcritical water media (Sushkova et al, 2015(Sushkova et al, , 2016Taki et al, 2018;Yabalak et al, 2024;Zhu et al, 2024).…”

Section: Procedures For Subcritical Aqueous Extraction Of Pahsmentioning

confidence: 99%

Investigating the possibility of using subcritical water for extracting polycyclic aromatic hydrocarbons from soils of the dry-steppe zone

Sushkova,

Dudnikova,

Minkina

et al. 2024

EJSS

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In the course of the model experiment, extraction conditions of 16 priority PAHs in subcritical water medium were selected for soils of the chestnut-solonetz complex. For low molecular weight 2-ringed naphthalene and 3-ringed acenaphthene, acenaphthylene, anthracene, phenanthrene and fluorene, the optimal extraction conditions correspond to 10 minutes at a temperature of 200°C. For high molecular weight 4- and 5-ring benz(a)anthracene, fluoranthene, pyrene, chrysene, benz(b)fluoranthene, benz(k)fluoranthene, dibenz(a,h)anthracene, as well as the pollutant of the first hazard class - benz(a)pyrene, the optimal extraction time reached 20 minutes at a temperature of 250°C. For 6-ring benz(g,h,i)perylene and indeno(1,2,3-cd)pyrene, the optimum extraction time increased to 30 minutes and the temperature to 300°C. When comparing the methods of extraction of pollutants from soils, it is shown that the extraction methods can be placed in the following descending order by the value of the extraction coefficient of priority PAHs from the studied types of soils: ultrasonic extraction (1.05) > subcritical extraction (1.13) > saponification method (1.25). Using multivariate analysis of dispersion it is shown that the efficiency of subcritical aqueous extraction decreases with increasing number of benzene rings in the PAH molecule, as well as with increasing soil salinity in the following order: Gleyic Kastanozems < Endosalic Kastanozems < Kastanozems Sodic < Solonets.

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Section: Procedures For Subcritical Aqueous Extraction Of Pahsmentioning

confidence: 99%

Investigating the possibility of using subcritical water for extracting polycyclic aromatic hydrocarbons from soils of the dry-steppe zone

Sushkova,

Dudnikova,

Minkina

et al. 2024

EJSS

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The Adsorption of Durene and Prehnitene on Metal–Organic Frameworks

Wang,

Wu,

Rao

et al. 2024

Processes

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Tetratoluene has the following three isomers: durene (DR), prehnitene (PR), and isodurene (IR). DR and PR often coexist during the separation of C10 heavy aromatics at different levels. They are both important organic chemical raw materials and their separation is the key to the high-efficiency industrial utilization of C10 heavy aromatics. In this paper, six metal–organic frameworks (MOFs), including ZU-61, MIL-101, UIO-66, UIO-66-NH2, Mg-MOF-74, and MIL-53(Al), were used as the adsorbents of DR and PR. Their skeletons were structurally optimized using VASP software (latest v. 6.4.3). The adsorption capacity and isosteric heats of both pure components and mixtures (the molar ratio was 1:1) in gas were calculated using Grand Canonical Monte Carlo simulation from 10 kPa to 300 kPa at 298 K. The results indicated that all adsorption processes were physical. ZU-61, UIO-66, UIO-66-NH2, and Mg-MOF-74 presented suitable capacity differences for DR and PR at 300 kPa. The selectivity values of these frameworks were all above 1.5. Thus, the four MOFs were prepared using the solvothermal method and characterized by SEM and XRD. Then, the competitive adsorption of DR and PR in liquid on the four MOFs was carried out as well. The results showed good agreement with the simulation in general, with a lower adsorption attained capacity due to the different phase states of both DR and PR. This study can guide the separation of tetratoluene isomers in C10 heavy aromatics.

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Selective extraction of aromatics from residual oil with subcritical water

Cited by 2 publications

References 36 publications

Investigating the possibility of using subcritical water for extracting polycyclic aromatic hydrocarbons from soils of the dry-steppe zone

Investigating the possibility of using subcritical water for extracting polycyclic aromatic hydrocarbons from soils of the dry-steppe zone

The Adsorption of Durene and Prehnitene on Metal–Organic Frameworks

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