Deep extractive denitrogenation with Cu-based ionic liquids and mechanistic insights

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2025-01-08 DOI:10.1002/aic.18739

Peiwen Wu, Bangzhu Wang, Hongping Li, Shaojie Ma, Linlin Chen, Jixing Liu, Yanhong Chao, Wenshuai Zhu, Chunming Xu

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引用次数: 0

Abstract

A major challenge in the extractive denitrogenation (EDN) of fuel oils lies in achieving high nitrogen removal efficiency with minimal extractant usage. To address this, a series of Cu-based ionic liquids (ILs) ([Bmim]Cl/CuCl₂-X) with different cation-to-anion ratios were synthesized and characterized. The cation-to-anion ratio was found to be crucial in determining the predominant anions present in the ILs. Among the synthesized Cu-based ILs, [Bmim]Cl/CuCl₂-1 exhibited outstanding EDN performance, achieving 100% nitrogen removal with minimal ionic liquid consumption. The anion [CuCl₃]⁻ was identified as playing a key role in the EDN process, where the unoccupied orbitals of Cu and the chloridion in [CuCl₃]⁻ facilitate effective coordination with nitrogen atoms in organic nitrogen compounds. This coordination forms Lewis acid–base interactions, which are essential for deep EDN. The study not only introduces an efficient Cu-based ionic liquid but also provides insights into optimizing ionic liquid design for better extraction performance.

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铜基离子液体深度萃取脱氮及其机理研究

燃料油萃取脱氮（EDN）的主要挑战在于如何在最少的萃取剂用量下实现高脱氮效率。为了解决这一问题，合成了一系列具有不同正负离子比的cu基离子液体（[Bmim]Cl/CuCl2-X）并对其进行了表征。发现正离子与阴离子的比例对于确定il中存在的主要阴离子至关重要。在合成的cu基il中，[Bmim]Cl/CuCl2-1表现出优异的EDN性能，以最小的离子液体消耗实现了100%的脱氮。阴离子[CuCl3]−在EDN过程中起着关键作用，其中Cu的未占据轨道和[CuCl3]−中的氯离子促进了有机氮化合物中氮原子的有效配位。这种配位形成了刘易斯酸碱相互作用，这对深度EDN至关重要。该研究不仅介绍了一种高效的铜基离子液体，而且为优化离子液体设计以获得更好的萃取性能提供了见解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.