scholarly journals Direct Measurement of the Interaction Energy between Solids and Gases. III. Comparison of the Calorimetric Titration Method with the Amine Titration Method for the Determination of Acid Strength Distribution of Silica-Alumina Surface

1978 ◽  
Vol 51 (7) ◽  
pp. 1970-1972 ◽  
Author(s):  
Hitofumi Taniguchi ◽  
Tatsuo Masuda ◽  
Kazuo Tsutsumi ◽  
Hiroshi Takahashi
Keyword(s):  
Interaction Energy ◽  
Direct Measurement ◽  
Acid Strength ◽  
Strength Distribution ◽  
Alumina Surface ◽  
Calorimetric Titration ◽  
Titration Method ◽  
Silica Alumina ◽  
Acid Strength Distribution

Characterization of coal hydrogenation catalysts. Determination of acid strength distribution

Fuel ◽  
1988 ◽  
Vol 67 (6) ◽  
pp. 803-807 ◽  
Author(s):  
Maria T. Martinez ◽  
Maria D. Martinez ◽  
J. Osácar ◽  
JoséL. Miranda
Keyword(s):  
Acid Strength ◽  
Strength Distribution ◽  
Hydrogenation Catalysts ◽  
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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