Catalysis Today ( IF 5.2 ) Pub Date : 2019-02-23 , DOI: 10.1016/j.cattod.2019.02.052
B. Lebeau , M. Bonne , J.D. Comparot , J. Rousseau , L. Michelin , J.L. Blin , S. Brunet
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TiO2 supported SBA-15 (xTi@SBA-15) materials with various high TiO2 loadings (x = 25, 50 and 70 wt%) have been used as support for impregnation of CoMo active phase for the hydrodesulfurization (HDS) of 4,6-dimethyldibenzothiophene (46DMDBT) as model molecule representative of gazole cuts. Compared to CoMoS supported over pure commercial TiO2 and conventional Al2O3, a higher total activity was measured corresponding to the presence of isomerization and dismutation reactions due to Brönsted acidity of TiO2. However, the HDS activity remains higher using alumina as support. Moreover, the DDS pathway was found favored to the HYD one with sulfided CoMo supported over xTi@SBA-15 catalysts contrary with alumina as support.
中文翻译:
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CoMoS负载介孔SiO 2 -TiO 2材料上的4,6-二甲基二苯并噻吩HDS
具有各种高TiO 2负载量(x = 25、50和70 wt%)的TiO 2支撑的SBA-15(xTi @ SBA-15)材料已被用作浸渍4的加氢脱硫(HDS)的CoMo活性相的载体。 1,6-二甲基二苯并噻吩(46DMDBT)作为代表gazole切口的模型分子。与纯商业TiO 2和常规Al 2 O 3上负载的CoMoS相比,测得更高的总活性,这对应于由于TiO 2的布朗斯台德酸度而导致的异构化和歧化反应。但是,使用氧化铝作为载体,HDS活性仍然较高。此外,发现DDS途径对HYD有利,而硫化CoMo负载在xTi @ SBA-15催化剂上,而不是氧化铝。