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《Acta Petrolei Sinica(Petroleum Processing Section)》 2006-06
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EFFECT OF SUPPORTS ON ACTIVE PHASE AND AROMATIC HYDROGENATION OF Ni-W HYTROTREATING CATALYSTS

LI Hong-bao,HUANG Wei-guo,KANG Xiao-hong,SHI Ya-hua(Research Institute of Petroleum Processing,SINOPEC,Beijing 100083,China)  
Different Ni-W catalysts with the same metal loading supported on γ-Al_2O_3,(B-Al_2O_3),F-Al_2O_3,SiO_2-Al_2O_3 were prepared by wet impregnation method.The catalysts were characterized by temperature programmed reduction(TPR),X-ray photoelectronspectrocscopy(XPS),and high resolution electron microscopy(HRTEM) to investigate the effect of supports on active phase.It was found that weaker metal-support interaction would lead to higher sulfiding degree of metals and lower dispersity at the same time.The aromatic hydrogenation activity of obtained catalyst was evaluated by two feeds with tetralin as model compound and n-heptane as solvent,one contained 10%(mass fraction) tetralin(Sample A) and the other one was 10% tetralin with 750 μg/g S and 250 μg/g N(Sample ASN).Reaction rate constants were calculated by pseudo-first order reaction kinetic equation.The relative acidity of catalyst was related with its hydrocracking activity.For these two feeds above mentioned,the hydrogenation activity of tetralin on different catalysts had no direct correlation with TPR,XPS,or HRTEM results.For feed ASN,the hydrogenation activity of the catalyst was associated with its hydrocracking activity for feed A,which showed that the adjustment of acidity could reduce the inhibition of S and N on tetralin hydrogenation activity of catalyst.
【CateGory Index】: TE621
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