Deep oxidative‐extractive desulfurization of fuels using benzyl‐based ionic liquid
Deep oxidative‐extractive desulfurization of fuels using benzyl‐based ionic liquid
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DOI：
10.1002/aic.15326
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发表时间：
2016-11
期刊：
影响因子：
3.7
通讯作者：
Mingxia Li;Zhiyong Zhou;Fan Zhang;Wenshuai Chai;Lele Zhang;Zhongqi Ren
中科院分区：
文献类型：
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作者：
Mingxia Li;Zhiyong Zhou;Fan Zhang;Wenshuai Chai;Lele Zhang;Zhongqi Ren
合成了4种苄基型离子液体，并将其用于模型油和真实的柴油的深度脱硫。[Bzmim][NTf 2]和[Bzmim][SCN]作为萃取剂对苯并噻吩（BT）和二苯并噻吩（DBT）的去除率高于[Bzmp][NTf 2]和[Bzmp][SCN]作为萃取剂。脱硫能力遵循能斯特定律。建立了反应萃取脱硫的数学模型。开发了一种氧化萃取两步深度脱硫方法。以乙酸为催化剂，先用H2O2氧化DBT，再用[Bzmim][NTf2]萃取模型油中未氧化的DBT和未结晶的二苯并噻吩亚砜（DBTO2），一级萃取后去除率达98.4%。此外，4，6-DMDBT的去除率为96.4%，经过氧化和一级萃取过程。此外，氧化萃取两步深度脱硫方法也是有效的柴油脱硫。经过氧化和三级错流萃取工艺后，硫的去除率达到96%以上。© 2016美国化学工程师学会AIChE J，62：4023 - 4034，2016
Four benzyl‐based ionic liquids (ILs) were synthetized and used for deep desulfurization of model oil and real diesel fuel. The removal efficiencies of benzothiophene (BT) and dibenzothiophene (DBT) with [Bzmim][NTf2] and [Bzmim][SCN] as extractants are higher than that with [Bzmp][NTf2] and [Bzmp][SCN] as extractants. The desulfurization capability follows the Nernst's Law. A reactive extraction mathematical model for desulfurization was established. An oxidative‐extractive two‐step deep desulfurization method was developed. DBT was first oxidized by H2O2with CH3COOH as catalyst and then the unoxidized DBT and uncrystallized dibenzothiophene sulfoxide (DBTO2) in model oil were extracted by [Bzmim][NTf2], and finally the removal efficiency was 98.4% after one‐stage extraction. Besides, the removal efficiency of 4,6‐DMDBT was 96.4% after oxidation and one‐stage extraction processes. Moreover, the oxidative‐extractive two‐step deep desulfurization method was also effective for desulfurization of diesel fuel. The removal efficiency of sulfur reached up to 96% after oxidation and three‐stage cross‐current extraction processes. © 2016 American Institute of Chemical EngineersAIChE J, 62: 4023–4034, 2016