Hydrogen bonding boosted oxidative desulfurization by ZnCl2/boric acid/polyethylene glycol-based ternary deep eutectic solvents
Hydrogen bonding boosted oxidative desulfurization by ZnCl2/boric acid/polyethylene glycol-based ternary deep eutectic solvents
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DOI：
10.1016/j.molliq.2022.120725
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发表时间：
2022-12
影响因子：
6
通讯作者：
Lixian Xu;Hao Jia;Dong Zhu;Fengkang Huan;Ruihong Liu;Wei Jiang;Wenshuai Zhu;Hua-ming Li
中科院分区：
文献类型：
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作者：
Lixian Xu;Hao Jia;Dong Zhu;Fengkang Huan;Ruihong Liu;Wei Jiang;Wenshuai Zhu;Hua-ming Li
低共熔溶剂作为一种新型的绿色溶剂，因其合成简单、无毒、可生物降解、液体范围广、溶剂化能力强等独特的优良性质而被广泛应用于各个领域。以ZnCl2、硼酸（BA）和聚乙二醇（PEG）为原料，通过氢键作用合成了一系列三元低共熔溶剂。与二元脱硫剂相比，ZnCl2/2BA/2PEG具有更好的脱硫性能，脱硫率可达98.7%。氢键相互作用被认为是DES形成和促进脱硫反应的关键因素。此外，BA和ZnCl2在脱硫体系中起到协同增效的积极作用。DES与燃料不混溶，可以重复使用六个循环，而不会显着降低活性。提出了氢键相互作用和O2·−自由基的积极作用的可能机制。该研究为设计新型的柴油脱硫系统提供了可能性，可用于燃料油的深度脱硫以及其他与萃取或催化相关的应用。
Deep eutectic solvents, as the novel and green solvents, are widely applied in various fields because of its unique and excellent quality, such as simple synthesis, non-toxic, biodegradable, wide range of liquids and strong solvation ability. In this work, a series of ternary deep eutectic solvents were synthesized using ZnCl2, boric acid (BA) and polyethylene glycol (PEG) with appropriate molar ratios by hydrogen bonds. Compared with binary DESs, ZnCl2/2BA/2PEG showed a better desulfurization performance, and 98.7 % sulfur removal was achieved. The hydrogen bonding interaction is considered as the key factor to the formation of DES and to promote the desulfurization reaction. In addition, BA and ZnCl2play a synergistic and positive role in the desulfurization system. The DES was immiscible with fuel and could be reused for six cycles without a significant reduction in activity. The possible mechanism of the positive effect of hydrogen bonding interaction and O2•−free radicals was proposed. This work offers more possibility for designing new types of DESs for deep desulfurization of fuel oils and other applications in relation to extraction or catalysis.