Design of dual-functional protic porous ionic liquids for boosting selective extractive desulfurization

Porous ionic liquids have demonstrated excellent performance in the field of separation, attributed to their high specific surface area and efficient mass transfer. Herein, task-specific protic porous ionic liquids (PPILs) were prepared by employing a novel one-step coupling neutralization reaction...

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Bibliographic Details
Published in:Petroleum science 2024-08, Vol.21 (4), p.2817-2829
Main Authors: Zhang, Jin-Rui, Yin, Jie, He, Jing, Ran, Hong-Shun, Jiang, Wei, Li, Hong-Ping, Zhu, Wen-Shuai, Li, Hua-Ming, Zhang, Ming
Format: Article
Language:English
Subjects:
Aromatic compounds
Aromatic hydrocarbons
Bonding strength
Chemical bonds
Density functional theory
Desulfurization
Desulfurizing
Dibenzothiophene
Efficiency
Energy consumption
Extractive desulfurization
Fourier transforms
Gas absorption
Hydrogen bonds
Ion pairs
Ionic liquids
Liquids
Mass transfer
Neutralization
NMR
Nuclear magnetic resonance
Performance evaluation
Porous materials
Protic porous ionic liquids
Selectivity
Sulfur content
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Summary:Porous ionic liquids have demonstrated excellent performance in the field of separation, attributed to their high specific surface area and efficient mass transfer. Herein, task-specific protic porous ionic liquids (PPILs) were prepared by employing a novel one-step coupling neutralization reaction strategy for extractive desulfurization. The single-extraction efficiency of PPILs reached 75.0% for dibenzothiophene. Moreover, adding aromatic hydrocarbon interferents resulted in a slight decrease in the extraction efficiency of PPILs (from 45.2% to 37.3%, 37.9%, and 33.5%), indicating the excellent extraction selectivity of PPILs. The experimental measurements and density functional theory calculations reveal that the surface channels of porous structures can selectively capture dibenzothiophene by the stronger electrophilicity (Eint(HS surface channel/DBT) = −39.8 kcal mol−1), and the multiple extraction sites of ion pairs can effectively enrich and transport dibenzothiophene from the oil phase into PPILs through π···π, C–H···π and hydrogen bonds interactions. Furthermore, this straightforward synthetic strategy can be employed in preparing porous liquids, offering new possibilities for synthesizing PPILs with tailored functionalities.
ISSN:1995-8226
1672-5107
1995-8226
DOI:10.1016/j.petsci.2024.05.001