کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
209598 | 461676 | 2015 | 6 صفحه PDF | دانلود رایگان |
• Preparation of Co2 +, Ni2 +, Zn2 + and Al3 + quaternary hydrotalcite-type materials
• High activity toward hydrodesulfurization (HDS) reactions
• Low activity toward hydrogenation (HYD) reactions
Co2 +, Ni2 +, Zn2 + and Al3 + quaternary hydrotalcite-type materials were synthesized at: 0.33; 0.25 and 0.20 (M3 +)/(M3 ++ M2 +) ratios. Then, these as-synthesized hydrotalcites were calcined and impregnated with Mo (15 wt.% MoO3) and Co (3Mo:Co) to obtain the catalytic precursors. As-synthesized and impregnated calcined hydrotalcites were characterized by different physico-chemical techniques such as: X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), BET surface area measurements and NH3-temperature programmed desorption (NH3-TPD). Finally, CoMo/calcined hydrotalcites were tested in hydrodesulfurization (HDS) and hydrogenation (HYS) reactions of thiophene and cyclohexene. Results showed that the 0.25 (M3 +)/(M3 ++ M2 +) ratio was the most active for the HDS reaction of thiophene, while the 0.33 (M3 +)/(M3 ++ M2 +) ratio showed the best performance for the HYD reaction of cyclohexene.
Conversion and selectivity (HDS/HYD) of CoMo/(calcined quaternary hydrotalcites) catalysts for hydrodesulfurization of thiophene and hydrogenation of cyclohexeneFigure optionsDownload as PowerPoint slide
Journal: Fuel Processing Technology - Volume 132, April 2015, Pages 105–110