Facile synthesis of amphiphilic polyoxometalate-based ionic liquid supported silica induced efficient performance in oxidative desulfurization
Facile synthesis of amphiphilic polyoxometalate-based ionic liquid supported silica induced efficient performance in oxidative desulfurization
复制标题
两亲性多金属氧酸盐基离子液体负载二氧化硅的简便合成诱导了氧化脱硫的高效性能
DOI：
10.1016/j.molcata.2015.05.007
复制
发表时间：
2015-09-01
影响因子：
--
通讯作者：
Li, Huaming
中科院分区：
文献类型：
--
作者：
Li, Meng;Zhang, Ming;Li, Huaming
随着燃料规格的严格规定，氧化脱硫工艺（ODS）被认为是在温和条件下实现深度脱硫的有前景的技术之一。在此，通过简便的水热法成功合成了两亲性多金属氧酸盐基负载二氧化硅[C(4)mim](3)PW12O40/SiO2，并将其用于ODS工艺。通过FT-IR、XPS、Raman、P-31 MAS NMR、UV-vis、广角XRD、N-2吸附脱附和SEM等手段对所得杂化样品的组成和结构进行了表征。实验结果表明，合成的材料保持了多金属氧酸盐基离子液体（POM 基离子液体）结构的完整性，并精细地分散在二氧化硅基质中。此外，样品[C(4)mim](3)PW12O40/SiO2具有适度的亲水疏水平衡表面，导致较高的硫去除率。此外，还详细研究了催化剂用量、H2O2/DBT摩尔比、温度、含硫底物类型对脱硫的影响。在最佳条件下，30分钟即可完全去除二苯并噻吩(DBT)。 (C) 2015 Elsevier B.V. 保留所有权利。
As strict regulations of fuel specifications implemented, oxidative desulfurization process (ODS) is considered as one of the promising technologies to achieve deep desulfurization under mild conditions. Herein, amphiphilic polyoxometalate-based supported silica [C(4)mim](3)PW12O40/SiO2 was successfully synthesized by a facile hydrothermal process and employed in ODS process. The composition and structure of obtained hybrid samples were characterized by means of FT-IR, XPS, Raman, P-31 MAS NMR, UV-vis, wide-angle XRD, N-2 adsorption desorption and SEM. The experimental results indicated that the as-synthesized materials maintained the integrity of architecture of polyoxometalate-based ionic liquids (POM-based ILs), which were finely dispersed into the silica matrix. Besides, the sample [C(4)mim](3)PW12O40/SiO2 possessed moderate hydrophilic hydrophobic balanced surface leading to higher sulfur removal. Moreover, the effects of the amount of catalyst, H2O2/DBT molar ratio, temperature, types of sulfur-containing substrate on the sulfur removal were also investigated in detail. Under optimal conditions, dibenzothiophene (DBT) could be completely removed in 30 min. (C) 2015 Elsevier B.V. All rights reserved.