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.

Study on n-heptane Conversion Over Ni-HZSM-5 Zeolite Catalysts

2017 ◽  
Vol 68 (4) ◽  
pp. 715-719
Author(s):  
Iuliean Vasile Asaftei ◽  
Neculai Catalin Lungu ◽  
ion Sandu ◽  
Maria Ignat
Keyword(s):  
Ion Exchange ◽  
Metal Content ◽  
Pulse Method ◽  
Acid Strength ◽  
Strength Distribution ◽  
Zeolite Catalysts ◽  
Acidic Properties ◽  
Mfi Zeolites ◽  
Acid Strength Distribution ◽  
Heptane Conversion

The conversion of n-heptanes by the chromatographic pulse method in the temperature range of 673 - 823K on the MFI zeolites modified by ion exchange with Ni(NO3)2 aqueous solutions was studied. The catalysts, HZSM-5 (SiO2/Al2O3 = 33.9), and Ni-HZSM-5 (wt. % Ni, 0.57, 1.09, 1.34,) having different acid strength distribution exhibit a conversion and a yield of aromatics depending on temperature and metal content. The highest selectivity for n-heptanes aromatization was obtained on the catalyst Ni3-HZSM-5 (wt. % Ni 1.34) at 823K. The metal actions and the acidic properties of zeolites have an important effect on the aromatization of n-heptanes.

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

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
Sign in / Sign up

Export Citation Format

Share Document