In situ IR and catalytic studies of the regeneration of acid sites in coked zeolite Y

2007 ◽  
Vol 103 (1-3) ◽  
pp. 225-229 ◽  
Author(s):  
Jerzy Datka ◽  
Barbara Gil
Keyword(s):  
Zeolite Y ◽  
Acid Sites ◽  
In Situ Ir

scholarly journals Effect of Additives on the Activity of Nickel–Tungsten Sulfide Hydroconversion Catalysts Prepared In Situ from Oil-Soluble Precursors

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 644 ◽  
Author(s):  
Mariia Kniazeva ◽  
Anton Maximov
Keyword(s):  
Zeolite Y ◽  
Acid Sites ◽  
System Component ◽  
Gas Oil ◽  
Tungsten Sulfide ◽  
Silica Alumina ◽  
Acidic Component ◽  
Amorphous Aluminosilicate ◽  
Nickel Tungsten

The nickel–tungsten sulfide catalysts for the hydroconversion of hydrocarbons were prepared from oil-soluble nickel and tungsten precursor compounds in situ with the use of silica, alumina, titania, zeolite Y, and amorphous aluminosilicate as additives in a vacuum gas oil medium. It was found that the catalytic activity in hydrocracking depends on the concentration of acid sites in the resulting catalyst. With the use of oxide additives, the dispersion and the promoter ratio of the in situ formed sulfide particles increased in the order SiO2–Al2O3–TiO2. It was noted that the promoter ratio of sulfide particles obtained with the use of aluminosilicate additives depended on their porous structure peculiarities. The use of titanium dioxide as a catalytic system component made it possible to reach high activity in hydrocracking, hydrodearomatization, and hydrodesulfurization, which was comparable to that of a system based on zeolite Y, a highly acidic component.

In situ IR and catalytic studies of the effect of coke on acid properties of steamed zeolite Y

2007 ◽  
Vol 99 (3) ◽  
pp. 328-333 ◽  
Author(s):  
Barbara Gil ◽  
Karolina Mierzyńska ◽  
Monika Szczerbińska ◽  
Jerzy Datka
Keyword(s):  
Zeolite Y ◽  
Acid Properties ◽  
In Situ Ir

Propane oxydehydrogenation reaction on a VPO/TiO2 catalyst. Role of the nature of acid sites determined by dynamic in-situ IR studies

1996 ◽  
Vol 32 (1-4) ◽  
pp. 57-61 ◽  
Author(s):  
L. Savary ◽  
J. Saussey ◽  
G. Costentin ◽  
M.M. Bettahar ◽  
M. Gubelmann-Bonneau ◽  
...  
Keyword(s):  
Acid Sites ◽  
Tio2 Catalyst ◽  
Ir Studies ◽  
In Situ Ir

In Situ IR Spectroscopy for Following the Copolymerization of CO2and Epoxides

2014 ◽  
Vol 86 (9) ◽  
pp. 1627-1628
Author(s):  
K. Böhm ◽  
W. Leitner ◽  
T. E. Müller
Keyword(s):  
Ir Spectroscopy ◽  
In Situ Ir ◽  
In Situ Ir Spectroscopy

In situ IR observation of photo-chemically deposited silicon nitride thin films

1991 ◽  
Vol 48-49 ◽  
pp. 409-413 ◽  
Author(s):  
T. Wadayama ◽  
T. Hihara ◽  
A. Hatta ◽  
W. Suëtaka
Keyword(s):  
Thin Films ◽  
Silicon Nitride ◽  
In Situ Ir
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