A novel method for fuel oil desulphurization by deep eutectic solvent extraction coupled with reduction using sodium borohydride,The Canadian Journal of Chemical Engineering

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A novel method for fuel oil desulphurization by deep eutectic solvent extraction coupled with reduction using sodium borohydride
The Canadian Journal of Chemical Engineering ( IF 1.6 ) Pub Date : 2020-10-07 , DOI: 10.1002/cjce.23895
Chenhua Shu ₁ , Feng Zhu ₁ , Xianhong Zhu ₁ , Faying Lai ₂

Affiliation

In order to improve sulphur removal efficiency, deep eutectic solvent (DES) is first introduced into the fuel oil desulphurization process with sodium borohydride (NaBH₄). Thereby, a novel method for fuel oil desulphurization by extraction coupled with reduction is proposed, where DES is used as stabilizer and extractant and NaBH₄ is used as reducing agent. The nickel borides produced from NaBH₄ and nickel salts were characterized using a particle size analyzer, surface area analyzer, and transmission electron microscopy. The results show that the nickel borides produced in DES have smaller particle sizes and a higher BET surface area than that in methanol/tetrahydrofuran (MeOH/THF). Sulphur removal efficiency using DES as medium was higher than that using MeOH/THF as medium. The effect of process parameters on the sulphur removal efficiency was investigated by orthogonal experiments. The results showed that the sulphur removal efficiency of dibenzothiophene can reach more than 96%. The desulphurization of dibenzothiophene should proceed over the cleavage of C−S bond to biphenyl and desulphurization reaction followed the pseudo‐first‐order reaction. The structures of the DESs remained unchanged after regeneration. In summary, the novel desulphurization method is feasible and promising.

中文翻译：

深共熔溶剂萃取结合硼氢化钠还原脱硫的新方法

为了提高脱硫效率，首先将低共熔溶剂（DES）与硼氢化钠（NaBH ₄）引入燃料油脱硫工艺中。因此，提出了一种以萃取结合还原的方法对燃料油进行脱硫的新方法，其中以DES为稳定剂和萃取剂，以NaBH ₄为还原剂。由NaBH ₄生产的硼化镍使用粒度分析仪，表面积分析仪和透射电子显微镜对镍盐和镍盐进行表征。结果表明，与甲醇/四氢呋喃（MeOH / THF）相比，DES中生成的硼化镍具有较小的粒径和较高的BET表面积。使用DES作为介质的脱硫效率高于使用MeOH / THF作为介质的脱硫效率。通过正交实验研究了工艺参数对脱硫效率的影响。结果表明，二苯并噻吩的脱硫效率可达到96％以上。二苯并噻吩的脱硫应通过将C-S键裂解为联苯进行，脱硫反应应遵循拟一级反应。再生后，DES的结构保持不变。总之，

更新日期：2020-10-07

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