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|Title:||Influence of preparation method on the performance of Pd/ ZrO2-Al2O3 catalysts for HDS|
|Abstract:||ZrO2-Al2O3 (I) and ZrO2-Al2O3(S) mixed supports were prepared using impregnation and sol-gel methods, separately. Influences of preparation methods on the properties of Pd based catalysts for hydrodesulphurization (HDS) of thiophene were studied. The prepared samples were characterized by means of XRD, H2-TPD, H2-TPR, XPS, NH3-TPD, H2 chemisorption and BET surface area. Pd/ZrO2-Al2O3(S) catalyst supported on ZrO2-Al2O3 (S) exhibited much higher HDS activity than that of the Pd/ZrO2-Al2O3 (I) catalyst supported on ZrO2-Al2O3 (I). As compared with Pd/ZrO2-Al2O3 (I) catalyst, Pd/ZrO2-Al2O3(S) catalyst has higher dispersion, more acid sites and stronger interaction between palladium and mixed support, which presented an increasing driving-force toward the catalyzed conversion of thiophene.|
|ISSN:||0975-0991 (Online); 0971-457X (Print)|
|Appears in Collections:||IJCT Vol.16(3) [May 2009]|
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