Intensification of oxidative-extractive desulfurization of real diesel fuel using ionic liquid in a miniaturized fluidic contactor under ultrasound irradiation

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-08-11 DOI:10.1016/j.cep.2025.110508

Hatef Bassareh, Masoud Karamzadeh, Mohammad Amin Sobati, Salman Movahedirad

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Abstract

This study investigates the ultrasound-assisted oxidative-extractive desulfurization of real diesel fuel using N-Octyl-3-methylpyridinium tetrafluoroborate as an ionic liquid in a microchannel contactor. Initially, oxidation of diesel fuel in a batch setup achieved 27 % sulfur removal, reducing the sulfur content from 1690 to 1234 ppmw. Subsequent extractive desulfurization in the microchannel at a solvent-to-fuel volume ratio of 1:1 resulted in a maximum sulfur removal of 82.2 %. Increasing the residence time from 12 to 301 s enhanced the sulfur removal from 52.3 % to 82.2 % under silent conditions, while ultrasound irradiation further improved the sulfur removal to 89.3 %. The application of four-stage extraction process led to a cumulative sulfur removal of 94.9 %, reducing the sulfur content of treated fuel to 86 ppmw. Regenerated ionic liquid showed negligible performance loss over two cycles. These results demonstrate the effectiveness of integrating ionic liquids, ultrasound, and microchannel contactors for high-efficiency desulfurization to meet stringent environmental regulations.

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微型流体接触器中离子液体强化超声辐照下柴油氧化萃取脱硫研究

以四氟硼酸n -辛基-3-甲基吡啶为离子液体，在微通道接触器中研究了超声辅助氧化萃取法对柴油的脱硫效果。最初，在间歇式装置中，柴油氧化实现了27%的硫去除，将硫含量从1690 ppmw降低到1234 ppmw。随后在微通道中以1:1的溶剂与燃料体积比进行萃取脱硫，最大脱硫率为82.2%。在静音条件下，将停留时间从12 s增加到301 s，硫的去除率从52.3%提高到82.2%，超声照射下硫的去除率进一步提高到89.3%。采用四段萃取工艺，累计脱硫率达94.9%，处理后的燃料硫含量降至86 ppmw。再生离子液体在两个循环中表现出可以忽略不计的性能损失。这些结果证明了离子液体、超声波和微通道接触器集成高效脱硫的有效性，以满足严格的环境法规。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.