Synergism between Ni and W in the NiW/γ-Al2O3 hydrotreating catalysts

被引:26
作者
Spojakina, A
Palcheva, R
Jiratova, K
Tyuliev, G
Petrov, L
机构
[1] Bulgarian Acad Sci, Inst Catalysis, Sofia 1113, Bulgaria
[2] Acad Sci Czech Republ, Inst Chem Proc Fundamentals, CR-16502 Prague, Czech Republic
关键词
NiW/gamma-Al2O3; thiophene hydrodesulfurization; TPR; XPS;
D O I
10.1007/s10562-005-7434-1
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A series of NiW/gamma-Al2O3 catalysts (20 and 30 wt% W and 1-5 wt% Ni) have been prepared and studied by TPR and XPS. HDS activity has been tested in the thiophene conversion. The effect of Ni and W loadings on the formation of different structures is presented. In the calcined catalysts several phases coexist, concentrations of which depend on the Ni/(Ni+W) atomic ratio. The Ni synergistic effect in the HDS reaction is confirmed by the increase in the HDS activity (similar to 10-15 times). This effect is ascribed to the formation of an active NiWS phase of high dispersion from the mixed NiW oxide precursors. At higher Ni/Ni+W ratio a redistribution of active components in additional amount of NiWS phase during sulfidation is suggested.
引用
收藏
页码:45 / 52
页数:8
相关论文
共 33 条
[1]   About the importance of surface W species in WOx/Al2O3 during n-butene skeletal isomerization [J].
Benitez, VM ;
Fígoli, NS .
CATALYSIS COMMUNICATIONS, 2002, 3 (10) :487-492
[2]   X-RAY PHOTOELECTRON SPECTROSCOPY STUDY OF SUPPORTED TUNGSTEN OXIDE [J].
BILOEN, P ;
POTT, GT .
JOURNAL OF CATALYSIS, 1973, 30 (02) :169-174
[3]   X-RAY PHOTOELECTRON-SPECTROSCOPY STUDIES ON NICKEL TUNGSTEN MIXED SULFIDE CATALYSTS [J].
BLANCHARD, L ;
GRIMBLOT, J ;
BONNELLE, JP .
JOURNAL OF CATALYSIS, 1986, 98 (01) :229-234
[4]  
Breysse M., 1988, CATAL TODAY, V4, P39
[5]   Influence of support-interaction on the sulfidation behavior and hydrodesulfurization activity of Al2O3-supported W, CoW, and NiW model catalysts [J].
Coulier, L ;
Kishan, G ;
van Veen, JAR ;
Niemantsverdriet, JW .
JOURNAL OF PHYSICAL CHEMISTRY B, 2002, 106 (23) :5897-5906
[6]   Effects of preparation method and sulfur poisoning on the hydrogenation and ring opening of tetralin on NiW/zirconium-doped mesoporous silica catalysts [J].
Eliche-Quesada, D ;
Mérida-Robles, J ;
Maireles-Torres, P ;
Rodríguez-Castellón, E ;
Busca, G ;
Finocchio, E ;
Jiménez-López, A .
JOURNAL OF CATALYSIS, 2003, 220 (02) :457-467
[7]   DIFFUSION OF NICKEL AND SURFACE RECONSTRUCTION IN NI/TIO2 CATALYSTS PROMOTED BY H-2 AND O-2 TREATMENTS [J].
ESPINOS, JP ;
GONZALEZELIPE, AR ;
MUNUERA, G .
SOLID STATE IONICS, 1993, 63-5 :748-754
[8]   Promoting effects in hydrogenation and hydrodesulfurization reactions on the zirconia and titania supported catalysts [J].
Ji, Y ;
Afanasiev, P ;
Vrinat, M ;
Li, WZ ;
Li, C .
APPLIED CATALYSIS A-GENERAL, 2004, 257 (02) :157-164
[9]   The effect of Ni loading and the sulfidation temperature on the structure and catalytic activity of Ni-W hydrodesulfurization catalysts [J].
Kim, CH ;
Yoon, WL ;
Lee, IC ;
Woo, SI .
APPLIED CATALYSIS A-GENERAL, 1996, 144 (1-2) :159-175
[10]   Promoting synergy in CoW sulfide hydrotreating catalysts by chelating agents [J].
Kishan, G ;
Coulier, L ;
van Veen, JAR ;
Niemantsverdriet, JW .
JOURNAL OF CATALYSIS, 2001, 200 (01) :194-196