Preparation of Y Zeolite-Based Catalysts and their Catalytic Cracking Performances of Venezuelan Heavy Oil

2012 ◽  
Vol 608-609 ◽  
pp. 1407-1412
Author(s):  
Peng Hui Zeng ◽  
Bao Jian Shen ◽  
Sheng Fu Ji ◽  
Yun Liang ◽  
Xiang Hai Meng
Keyword(s):  
Pore Structure ◽  
Heavy Oil ◽  
Catalytic Cracking ◽  
Product Distribution ◽  
Pore Distribution ◽  
Oil Yield ◽  
Y Zeolite ◽  
Acidic Properties ◽  
Cracking Performance ◽  
Adsorption Desorption

Five kinds of modified Y zeolite-based fluid catalytic cracking (FCC) catalysts were prepared. The N2 adsorption desorption and NH3 temperature-programmed-desorption (NH3-TPD) were used to investigate the pore structure and acidic properties of the catalysts. The effects of pore structure and acidic properties of catalysts on the catalytic cracking performance of Venezuelan heavy oil were carried out using an advanced cracking evaluation unit. The results of N2 adsorption desorption and NH3-TPD show that CAT-A and CAT-B catalysts with rundle pore distribution have a similar pore sizes and acidSubscript textSubscript textic properties. The catalytic cracking results show that the acidic properties and the pore distribution of the catalysts have obvious effects on the conversion and product distribution. The light oil yield and total liquid oil yield can reach 58.75wt% and 73.83 wt%, respectively, under reaction temperature of 520°C.

Improving the physicochemical properties of Y zeolite for catalytic cracking of heavy oil via sequential steam-alkali-acid treatments

2020 ◽  
Vol 294 ◽  
pp. 109854 ◽  
Author(s):  
Erfan Aghaei ◽  
Ramin Karimzadeh ◽  
Hamid Reza Godini ◽  
Aleksander Gurlo ◽  
Oliver Gorke
Keyword(s):  
Physicochemical Properties ◽  
Heavy Oil ◽  
Catalytic Cracking ◽  
Y Zeolite ◽  
Acid Treatments

Optimizing product distribution in the heavy oil catalytic cracking (MIP) process

2017 ◽  
Vol 35 (13) ◽  
pp. 1315-1320 ◽  
Author(s):  
Fusheng Ouyang ◽  
Jianhua Zhang ◽  
Weigang Fang
Keyword(s):  
Heavy Oil ◽  
Catalytic Cracking ◽  
Product Distribution

An analytical microscopic study of metals in fluidized catalytic cracking catalyst

1986 ◽  
Vol 44 ◽  
pp. 854-855
Author(s):  
Clifford S. Rainey
Keyword(s):  
Electron Microscopy ◽  
Spatial Distribution ◽  
Catalytic Cracking ◽  
Catalyst Deactivation ◽  
Coke Formation ◽  
Acid Sites ◽  
Y Zeolite ◽  
Fcc Catalyst ◽  
Fluidized Catalytic Cracking ◽  
High Regeneration

The spatial distribution of V and Ni deposited within fluidized catalytic cracking (FCC) catalyst is studied because these metals contribute to catalyst deactivation. Y zeolite in FCC microspheres are high SiO2 aluminosilicates with molecular-sized channels that contain a mixture of lanthanoids. They must withstand high regeneration temperatures and retain acid sites needed for cracking of hydrocarbons, a process essential for efficient gasoline production. Zeolite in combination with V to form vanadates, or less diffusion in the channels due to coke formation, may deactivate catalyst. Other factors such as metal "skins", microsphere sintering, and attrition may also be involved. SEM of FCC fracture surfaces, AEM of Y zeolite, and electron microscopy of this work are developed to better understand and minimize catalyst deactivation.

scholarly journals A diffusion anisotropy descriptor links morphology effects of H-ZSM-5 zeolites to their catalytic cracking performance

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Xiaoliang Liu ◽  
Jing Shi ◽  
Guang Yang ◽  
Jian Zhou ◽  
Chuanming Wang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Catalytic Cracking ◽  
Catalytic Performance ◽  
Zeolite Catalysts ◽  
Time Resolved ◽  
Cracking Performance ◽  
Morphology Effect ◽  
Ft Ir ◽  
The Difference ◽  
Dynamics Simulations

AbstractZeolite morphology is crucial in determining their catalytic activity, selectivity and stability, but quantitative descriptors of such a morphology effect are challenging to define. Here we introduce a descriptor that accounts for the morphology effect in the catalytic performances of H-ZSM-5 zeolite for C4 olefin catalytic cracking. A series of H-ZSM-5 zeolites with similar sheet-like morphology but different c-axis lengths were synthesized. We found that the catalytic activity and stability is improved in samples with longer c-axis. Combining time-resolved in-situ FT-IR spectroscopy with molecular dynamics simulations, we show that the difference in catalytic performance can be attributed to the anisotropy of the intracrystalline diffusive propensity of the olefins in different channels. Our descriptor offers mechanistic insight for the design of highly effective zeolite catalysts for olefin cracking.

scholarly journals Role of Catalyst in Optimizing Fluid Catalytic Cracking Performance During Cracking of H-Oil-Derived Gas Oils

ACS Omega ◽  
2021 ◽  
Author(s):  
Dicho Stratiev ◽  
Ivelina Shishkova ◽  
Mihail Ivanov ◽  
Rosen Dinkov ◽  
Borislav Georgiev ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Fluid Catalytic Cracking ◽  
Cracking Performance

Efficiency of ethanol conversion induced by controlled modification of pore structure and acidic properties of alumina catalysts

2011 ◽  
Vol 398 (1-2) ◽  
pp. 59-65 ◽  
Author(s):  
Leandro Martins ◽  
Dilson Cardoso ◽  
Peter Hammer ◽  
Teresita Garetto ◽  
Sandra H. Pulcinelli ◽  
...  
Keyword(s):  
Pore Structure ◽  
Ethanol Conversion ◽  
Acidic Properties ◽  
Alumina Catalysts

Comparison of Catalytic Cracking Performance between Riser Reactor and Microactivity Test (MAT) Unit

2001 ◽  
Vol 15 (4) ◽  
pp. 783-785 ◽  
Author(s):  
Siauw Ng ◽  
Hong Yang ◽  
Jinsheng Wang ◽  
Yuxia Zhu ◽  
Craig Fairbridge ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Riser Reactor ◽  
Cracking Performance

Structural and surface aspects of thermally treated copper aluminium mixed hydroxides

1991 ◽  
Vol 69 (10) ◽  
pp. 1511-1515 ◽  
Author(s):  
Awad I. Ahmed ◽  
S. E. Samra ◽  
S. A. El-Hakam
Keyword(s):  
Pore Structure ◽  
Copper Content ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Phase Changes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Areas ◽  
Structure Surface ◽  
Adsorption Desorption

CuO–Al2O3 catalysts containing various amounts of copper oxide have been prepared by precipitation. The phase changes were studied by X-ray diffraction. The results obtained revealed that the thermal treatment of solid CuO–Al2O3 at 700 °C produced only crystalline CuO. Heating to 900 °C led to the formation of copper alumina spinel together with unreacted CuO and γ-Al2O3. The spinel content was found to increase with increasing copper content. Nitrogen adsorption–desorption isotherms on the calcined samples have been measured. Surface areas have been calculated and the pore structure analysed. The textural properties of the system were found to depend on both the copper content and the calcination temperature. Key words: CuO, Al2O3 catalysts, structure, surface area, pore structure.

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