期刊
CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY
卷 23, 期 3, 页码 58-68出版社
CHINA PETROLEUM PROCESSING & PETROCHEMICAL TECHNOLOGY PRESS
关键词
phosphotungstic acid; bimodal mesoporous silica; titanium dioxide; photocatalytic desulfurization; UV irradiation; dibenzothiophene
资金
- Program for Liaoning Excellent Talents in Universities 'LNET' [LJQ2015062]
- Program for Science and Technology Agency of Liaoning Province [20170540585]
- General Scientific Research Project of Liaoning Provincial Department of Education [L2015296, L2016018]
- Science and Technology Planning Project of Fushun [FSKJHT201376]
TiO2-PTA/BMMS catalyst was synthesized for photocatalytic oxidative desulfurization, achieving a desulfurization rate of 99.6% under UV irradiation. The catalyst maintained stable catalytic activity after eight cycles of reuse, indicating good reusability. The synergistic effects of photocatalytic oxidation and methanol extraction played a crucial role in the catalytic system.
With the bimodal mesoporous silica (BMMS) acting as the support and the composite of TiO2 with phosphotungstic acid (PTA) functioning as the active constituent, TiO2-PTA/BMMS was synthesized by the two-step impregnation route. This catalyst was applied in the photocatalytic oxidative desulfurization (PODS) process, with dibenzothiophene serving as the model sulfur compound. PODS proceeds in one pot, in which H2O2 acts as the oxidant and methanol plays the role of the solvent. TiO2-PTA/BMMS was characterized by XRD, N-2 adsorption and desorption, XRF, FTIR, UV-vis, SEM, EDS and TEM techniques. It showed that the introduction of PTA contributes higher order, higher surface area and pore volume to the bimodal mesoporous support. With TiO2-PTA/BMMS used as the catalyst under the UV irradiation, the desulfurization rate can reach 99.6%. This result is obviously higher than that achieved by TiO2/BMMS. The catalyst also has no significant drop in catalytic activity after eight runs of reusing. In such catalytic system, the synergistic effects of this photocatalytic oxidation and the extraction with the methanol serving as the solvent played an indispensable role.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据