Extractive removal of both basic and non-basic nitrogens from fuel oil by dicarboxyl-modified polyethylene glycol: Performance and mechanism

Jiang, Xingmao; Shu, Zhu; Gao, Jiajun; Yu, Yaqian; Xiong, Chunyan; Li, Chunxi; Yang, Weimin

doi:10.1016/j.fuel.2019.115626

Cited by 17 publications

(34 citation statements)

References 27 publications

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“…The details concerning the content analysis can be referenced in our previous work. 23,30 2.4. Determination of S/N Removal and Distribution Coefficient.…”

Section: Methodsmentioning

confidence: 99%

“…The content of nitrogen and toluene was detected by high-performance liquid chromatography (HPLC, Shimadzu LC2030). The details concerning the content analysis can be referenced in our previous work. , …”

Section: Experimental Sectionmentioning

confidence: 99%

“…The PEA/FA complex as the extractant has the following advantages. First, PEA is a modified polypropylene glycol by replacing two terminal −OH groups with −NH 2 groups and has been used as the commercial solvent for a gasoline detergent . Therefore, the PEA-based solvent can be regarded as a green and low-cost extractant.…”

Section: Introductionmentioning

confidence: 99%

“…First, PEA is a modified polypropylene glycol by replacing two terminal −OH groups with −NH 2 groups and has been used as the commercial solvent for a gasoline detergent. 23 Therefore, the PEA-based solvent can be regarded as a green and low-cost extractant. Second, the PEA/FA complex shows low volatility and solubility in the oils as a result of the larger molecule (polyether chain) and higher polarity (presence of an amide group and complexation between the amide group and the redundant FA).…”

Section: Introductionmentioning

confidence: 99%

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Extractive Desulfurization and Denitrogenation from Fuel Oil by a Polyether-Amine-Based Solvent

et al. 2020

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A polyether amine (PEA)-based solvent, which can be synthesized by PEA and formic acid (FA), is a green, low-cost, and efficient extractant for desulfurization and denitrogenation. Under the conditions of ambient pressure, 15 min, 30 °C, m(extractant)/m(oil) of 1:1, and n(FA)/n(PEA) of 10:1, S removal of dibenzothiophene (DBT), benzothiophene (BT), and thiophene (T) was 72.16, 63.96, and 53.01%, respectively, and N removal of indole, pyrrole, pyridine, and quinoline was 98.31, 97.12, 91.51, and 89.93%, respectively. The activity of the PEA/FA complex was attributed to an active O atom originated from PEA and an amide group formed by the reaction and the complexation between PEA and FA, which was beneficial to enough Lewis basicity and mild Brønsted acidity. In addition, the PEA/FA complex can realize deep desulfurization by multi-stage extraction and has good regeneration ability. The PEA/FA complex was still effective for real oil. More than 68% of sulfur in straight-run diesel oil can be removed after 5 cycle extractions.

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“…The details concerning the content analysis can be referenced in our previous work. 23,30 2.4. Determination of S/N Removal and Distribution Coefficient.…”

Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Extractive Desulfurization and Denitrogenation from Fuel Oil by a Polyether-Amine-Based Solvent

et al. 2020

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“…Previously, we studied the interphase distribution of thiophene in systems based on water-soluble polymers, and it was found that the system based on polyethylene glycol 400 exhibits effective extraction properties with respect to thiophene. [29] Also, systems based on water-soluble polymers are used in the processes of removing nitrogen-containing compounds from petroleum products, so Jiang et al [30] investigated the dependence of the extraction of basic and non-basic nitrogen-containing compounds on the composition of systems based on water-soluble polymers. Zhu et al [31] proved the effectiveness of the use of deep eutectic solvents based on water-soluble polymers in the processes of fuel purification from nitrogen-containing compounds.…”

Section: Introductionmentioning

confidence: 99%

Extraction of pyridine using systems based on water-soluble polymers

Solov’ev

Соловьева

Milevsky

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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In the process of using hydrocarbon fractions containing a large amount of nitrogenous compounds, nitrogen oxides are released into the atmospheric air, which have a negative impact on the environment and human health. The traditional cleaning method is treatment with a 25% sulfuric acid solution and subsequent hydrotreating. However, this process becomes disadvantageous due to its inability to achieve ultra-low concentrations of nitrogen-containing compounds (<10 ppm). Extraction using non-toxic and environmentally friendly water-soluble polymers is a promising alternative compared to traditional methods. This work presents the dependence of the interphase distribution of pyridine on the composition of extraction systems based on water-soluble polymers. According to the results of the study, it was found that polyethylene glycol-400, polypropylene glycol-425 and methyl ether of polyethylene glycol-350 exhibit effective extraction properties in relation to pyridine and extract it by 90.95%, 90.33% and 87.82% in one extraction stage, respectively. It was also found that the use of two-phase aqueous systems based on water-soluble polymers in the process of extracting pyridine is promising.

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Extractive denitrogenization of liquid model fuel using polyethylene glycol methyl ether 350

Solov'ev,

Solov'eva,

Zakhodyaeva

et al. 2023

Can J Chem Eng

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In the present study, we studied the effectiveness of the water‐soluble polymer polyethylene glycol methyl ether 350 (PEG ME‐350) on the extraction of nitrogen‐containing heterocyclic compounds—quinoline and indole—from n‐hexane. The dependences of the quantitative characteristics of the extraction of N‐compounds on the contact time of the phases, the content of PEG ME‐350 in the n‐hexane–water system, the initial concentration of nitrogen‐containing heterocyclic compounds in the organic phase, and the volumetric ratio of the phases were obtained. It has been established that PEG ME‐350 is an effective extractant in the process of stepwise extraction of quinoline and indole, and the mechanisms of their extraction have also been proposed and proven. The results can be further used in the purification of light hydrocarbon fractions from nitrogen‐containing heterocyclic compounds.

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Extractive removal of both basic and non-basic nitrogens from fuel oil by dicarboxyl-modified polyethylene glycol: Performance and mechanism

Cited by 17 publications

References 27 publications

Extractive Desulfurization and Denitrogenation from Fuel Oil by a Polyether-Amine-Based Solvent

Extractive Desulfurization and Denitrogenation from Fuel Oil by a Polyether-Amine-Based Solvent

Extraction of pyridine using systems based on water-soluble polymers

Extractive denitrogenization of liquid model fuel using polyethylene glycol methyl ether 350

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