Metal Oxide Supported Vanadium Substituted Keggin Type Polyoxometalates as Catalyst For Oxidation of Dibenzothiophene

International Conference on Chemistry and Material Science 2017

化学;材料科学

Lesbani, Aldes^1 ; Meilyana, Sarah Novri^1 ; Karim, Nofi^1 ; Hidayati, Nurlisa^1 ; Said, Muhammad^1 ; Mohadi, Risfidian^1 ; Miksusanti^1

Department of Chemistry, Faculty of Mathematic and Natural Sciences, Sriwijaya University, Sumatera Selatan, Indonesia^1

关键词: De-sulfurization process;    Dibenzothiophenes;    Impregnation process;    Metal oxides;    Morphology analysis;    Polyoxometalates;    Supported metals;    Wet impregnation method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/299/1/012084/pdf
DOI  :  10.1088/1757-899X/299/1/012084

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Supported polyoxometalatate H4[γ-H2SiV2W10O40]•nH2O with metal oxide i.e. silica, titanium, and tantalum was successfully synthesized via wet impregnation method to form H4[γ-H2SiV2W10O40]•nH2O-Si, H4[γ-H2SiV2W10O40]•nH2O-Ti, and H4[γ-H2SiV2W10O40]•nH2O-Ta. Characterization was performed using FTIR spectroscopy, X-Ray analyses, and morphology analyses using SEM. All compounds were used as the catalyst for desulfurization of dibenzothiophene (DBT). Silica and titanium supported polyoxometalate H4[γ-H2SiV2W10O40]•nH2O better than tantalum due to retaining crystallinity after impregnation process. On the other hand, compound H H4[γ-H2SiV2W10O40]•nH2O-Ta showed high catalytic activity than other supported metal oxides for desulfurization of DBT. Optimization desulfurization process resulted in 99% conversion of DBT under a mild condition at 70 °C, 0.1 g catalyst, and reaction for 3 hours. Regeneration studies showed catalyst H4[γ-H2SiV2W10O40]•nH2O-Ti was remaining catalytic activity for desulfurization of DBT.