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Title: Influence of preparation method on the performance of Pd/ ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> catalysts for HDS
Authors: Chen, Sufen
Luo, Laitao
Cheng, Xinsun
Keywords: Hydrodesulphurization
Issue Date: May-2009
Publisher: CSIR
Abstract: ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3 </sub>(I) and ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>(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, H<sub>2</sub>-TPD, H<sub>2</sub>-TPR, XPS, NH<sub>3</sub>-TPD, H<sub>2</sub> chemisorption and BET surface area. Pd/ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>(S) catalyst supported on ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3 </sub>(S) exhibited much higher HDS activity than that of the Pd/ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3 </sub>(I) catalyst supported on ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3 </sub>(I). As compared with Pd/ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3 </sub>(I) catalyst, Pd/ZrO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub>(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.
Description: 272-277
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.16(3) [May 2009]

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