Investigations on the characteristics, surface, acidity/acid strength distribution and catalytic properties of the zinc-substituted aluminophosphate of type 36 molecular sieve

1994 ◽  
Vol 112 (2) ◽  
pp. 125-139 ◽  
Author(s):  
Deepak Bansilal Akolekar
Keyword(s):  
Molecular Sieve ◽  
Catalytic Properties ◽  
Surface Acidity ◽  
Acid Strength ◽  
Strength Distribution ◽  
Acid Strength Distribution

scholarly journals Surface Acidity of Silica-Alumina Catalysts in Relation to the Preparation Variables

1986 ◽  
Vol 3 (2) ◽  
pp. 95-108 ◽  
Author(s):  
J. R. González-Velasco ◽  
J. A. González-Marcos ◽  
J. I. Gutiérrez-Ortiz ◽  
A. Romero
Keyword(s):  
Calcination Temperature ◽  
Surface Acidity ◽  
Acid Strength ◽  
Strength Distribution ◽  
Precipitation Rate ◽  
Silica Alumina ◽  
Acid Strength Distribution ◽  
Alumina Catalysts

Factorial and rotational designs have been used to analyse the effect of each preparative variable on the surface acid strength distribution in silica-alumina catalysts. Relationships between the surface acidities at p Ka = 2·8, 3·3 and 4·8 and the most important variables, namely precipitation rate and temperature, drying pressure and temperature, impregnation concentration and calcination temperature have been obtained.

Performance of Ag-HZSM-5 Zeolite Catalysts in n-heptane Conversion

2017 ◽  
Vol 68 (1) ◽  
pp. 116-120
Author(s):  
Iuliean Vasile Asaftei ◽  
Neculai Catalin Lungu ◽  
Lucian Mihail Birsa ◽  
Ioan Gabriel Sandu ◽  
Laura Gabriela Sarbu ◽  
...  
Keyword(s):  
Aromatic Hydrocarbons ◽  
Metal Content ◽  
Pulse Method ◽  
Acid Strength ◽  
Strength Distribution ◽  
Zeolite Catalysts ◽  
Benzene Toluene ◽  
Acid Strength Distribution ◽  
Silver Cations ◽  
Heptane Conversion

The conversion of n-heptanes into aromatic hydrocarbons benzene, toluene and xylenes (BTX), by the chromatographic pulse method in the temperature range of 673 - 823K was performed over the HZSM-5 and Ag-HZSM-5 zeolites modified by ion exchange with AgNO3 aqueous solutions. The catalysts, HZSM-5 (SiO2/Al2O3 = 33.9), and Ag-HZSM-5 (Ag1-HZSM-5 wt. % Ag1.02, Ag2-HZSM-5 wt. % Ag 1.62; and Ag3-HZSM-5 wt. % Ag 2.05 having different acid strength distribution exhibit a conversion and a yield of aromatics depending on temperature and metal content. The yield of aromatic hydrocarbons BTX appreciably increased by incorporating silver cations Ag+ into HZSM-5.

Effect of acid strength distribution on conversion of FCC gasoline over a ZSM-5 zeolite catalyst

2005 ◽  
Vol 84 (1) ◽  
pp. 45-51 ◽  
Author(s):  
Zhihua Wu ◽  
Shenglin Liu ◽  
Sujuan Xie ◽  
Qingxia Wang ◽  
Xinhua Qian ◽  
...  
Keyword(s):  
Zeolite Catalyst ◽  
Acid Strength ◽  
Strength Distribution ◽  
Fcc Gasoline ◽  
Acid Strength Distribution
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