Oxidative desulfurization of DBT with H2O2 catalysed by TiO2/porous glass
Oxidative desulfurization of DBT with H2O2 catalysed by TiO2/porous glass
复制标题
TiO2/多孔玻璃催化H2O2氧化脱硫DBT
DOI：
10.1039/c5gc01653c
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发表时间：
2016
期刊：
影响因子：
9.8
通讯作者：
Luo G. S.
中科院分区：
文献类型：
--
作者：
Shen C.;Wang Y. J.;Xu J. H.;Luo G. S.
针对二苯并噻吩（DBT）和4，6-二甲基二苯并噻吩（4，6-DMDBT）的超深度氧化脱硫（ODS）治理大气污染，设计并制备了多孔玻璃负载纳米TiO 2两亲催化剂。使用被认为是“绿色”氧化剂的过氧化氢，并且对于极端的液-液相比（通常大于1500）的反应体系，0.19 mL g-1的催化剂的孔体积为过氧化氢的储存提供了足够的空间。所制备的催化剂提供了116.9 m2 g−1的高界面表面积，并通过促进传质来增强反应。单分散的TiO 2具有良好的结晶性。随着负载量从1.27wt%增加到9.85wt%，平均粒径从2.1到7.8nm变化。该催化剂具有较高的活性和良好的稳定性，在2 min内转化率达到100%，5次循环后转化率仅从100.0 ± 1.0%下降到94.3 ± 0.6%。该催化剂可重复使用，为高效超深度脱硫提供了一种绿色的选择。
Aimed at ultra-deep oxidative desulfurization (ODS) of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (4,6-DMDBT) to control air pollution, we specially designed and prepared porous glass supported with TiO2 nanoparticles acting as an amphiphilic catalyst. Hydrogen peroxide which is considered as the “green” oxidant was used, and for the extreme liquid–liquid phase ratio (usually larger than 1500) reaction system, a pore volume of 0.19 mL g−1 of the catalyst provides enough space for the storage of hydrogen peroxide. The as-prepared catalyst offers a high interfacial surface area of 116.9 m2 g−1 and enhances the reaction by facilitating the mass transfer. The mono-dispersed TiO2 exhibited good crystallinity. The mean diameter varied from 2.1 to 7.8 nm with the loading amount increasing from 1.27 wt% to 9.85 wt%. The catalyst showed high activity and good stability for producing ultra-clean fuels: 100% conversion was obtained within 2 min and the conversion just decreased from 100.0 ± 1.0% to 94.3 ± 0.6% after 5 cycles. Overall, this new reusable catalyst provided an alternative for highly efficient ultra-deep desulfurization in a green way.