scholarly journals Fabrication of intracrystalline mesopores within zeolite Y with greatly decreased templates

RSC Advances ◽  
2017 ◽  
Vol 7 (16) ◽  
pp. 9605-9609 ◽  
Author(s):  
Zhen Wang ◽  
Honghai Liu ◽  
Qingting Meng ◽  
Junsu Jin ◽  
Chunyan Xu ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Zeolite Y ◽  
Large Molecules

Zeolite Y with intracrystalline mesopores has been emerging as one of the most potential materials in the catalytic cracking of large molecules.

scholarly journals Catalytic Cracking of n-Hexadecane Using Carbon Nanostructures/Nano-Zeolite-Y Composite Catalyst

Catalysts ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1385
Author(s):  
Botagoz Zhuman ◽  
Shaheen Fatima Anis ◽  
Saepurahman ◽  
Gnanapragasam Singravel ◽  
Raed Hashaikeh
Keyword(s):  
Surface Area ◽  
Catalytic Cracking ◽  
Carbon Nanostructures ◽  
Active Sites ◽  
Zeolite Y ◽  
High Surface ◽  
High Surface Area ◽  
Composite Catalyst ◽  
Homogeneous Distribution ◽  
Binding Material

Zeolite-based catalysts are usually utilized in the form of a composite with binders, such as alumina, silica, clay, and others. However, these binders are usually known to block the accessibility of the active sites in zeolites, leading to a decreased effective surface area and agglomeration of zeolite particles. The aim of this work is to utilize carbon nanostructures (CNS) as a binding material for nano-zeolite-Y particles. The unique properties of CNS, such as its high surface area, thermal stability, and flexibility of its fibrous structure, makes it a promising material to hold and bind the nano-zeolite particles, yet with a contemporaneous accessibility of the reactants to the porous zeolite structure. In the current study, a nano-zeolite-Y/CNS composite catalyst was fabricated through a ball milling approach. The catalyst possesses a high surface area of 834 m2/g, which is significantly higher than the conventional commercial cracking catalysts. Using CNS as a binding material provided homogeneous distribution of the zeolite nanoparticles with high accessibility to the active sites and good mechanical stability. In addition, CNS was found to be an effective binding material for nano-zeolite particles, solving their major drawback of agglomeration. The nano-zeolite-Y/CNS composite showed 80% conversion for hexadecane catalytic cracking into valuable olefins and hydrogen gas, which was 14% higher compared to that of pure nano-zeolite-Y particles.

scholarly journals Conversion of Isoprenoid Oil by Catalytic Cracking and Hydrocracking over Nanoporous Hybrid Catalysts

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Toshiyuki Kimura ◽  
Chen Liu ◽  
Xiaohong Li ◽  
Takaaki Maekawa ◽  
Sachio Asaoka
Keyword(s):  
Octane Number ◽  
Catalytic Cracking ◽  
Reaction Scheme ◽  
Major Product ◽  
Liquefied Petroleum Gas ◽  
Hybrid Catalyst ◽  
Large Molecules ◽  
Hybrid Catalysts ◽  
Microalgae Oil ◽  
High Octane

In order to produce petroleum alternatives from biomass, a significant amount of research has been focused on oils from microalgae due to their origin, which would not affect food availability. Nanoporous hybrid catalysts composed ofnsAl2O3and zeolites have been proven to be very useful compared to traditional catalysts in hydrotreating (HT), hydrocracking (HC), and catalytic cracking (CC) of large molecules. To evaluate the reaction scheme and products from model isoprenoid compounds of microalgae oil, nanoporous hybrid catalyst technologies (CC:nsAl2O3/H-USY andnsAl2O3/H-GaAlMFI; HC: [Ni-Mo/γ-Al2O3]/nsAl2O3/H-beta) were studied. The major product from CC onnsAl2O3/H-USY was highly aromatic gasoline, while the product from HC was half-isoparaffinic/olefinic kerosene. Although more than 50 wt% of the products from HT/CC on the USY catalyst was liquefied petroleum gas due to overcracking, the product from HT/CC on the MFI catalyst was high-octane-number gasoline. Delightfully, the product from HT/HC was kerosene and its average number was 11, with more than 80 wt% being isoparaffinic. As a result, it was demonstrated that hydrotreating may convert isoprenoid oil from microalgae over nanoporous hybrid catalysts into a variety of products.

Facile Synthesis of Mesoporous Zeolite Y with Improved Catalytic Performance for Heavy Oil Fluid Catalytic Cracking

2014 ◽  
Vol 53 (8) ◽  
pp. 3406-3411 ◽  
Author(s):  
Junsu Jin ◽  
Chaoyun Peng ◽  
Jiujiang Wang ◽  
Hongtao Liu ◽  
Xionghou Gao ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Catalytic Cracking ◽  
Zeolite Y ◽  
Catalytic Performance ◽  
Fluid Catalytic Cracking ◽  
Mesoporous Zeolite ◽  
Facile Synthesis

scholarly journals Photo-spectroscopy of mixtures of catalyst particles reveals their age and type

2016 ◽  
Vol 188 ◽  
pp. 69-79 ◽  
Author(s):  
M. M. Kerssens ◽  
A. Wilbers ◽  
J. Kramer ◽  
P. de Peinder ◽  
G. Mesu ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Zeolite Y ◽  
Catalyst Particle ◽  
Micropore Volume ◽  
Activity Data ◽  
Selective Staining ◽  
Zeolite Catalysis ◽  
Color Changes ◽  
Fcc Catalyst ◽  
Photo Camera

Within a fluid catalytic cracking (FCC) unit, a mixture of catalyst particles that consist of either zeolite Y (FCC-Y) or ZSM-5 (FCC-ZSM-5) is used in order to boost the propylene yield when processing crude oil fractions. Mixtures of differently aged FCC-Y and FCC-ZSM-5 particles circulating in the FCC unit, the so-called equilibrium catalyst (Ecat), are routinely studied to monitor the overall efficiency of the FCC process. In this study, the age of individual catalyst particles is evaluated based upon photographs after selective staining with substituted styrene molecules. The observed color changes are linked to physical properties, such as the micropore volume and catalytic cracking activity data. Furthermore, it has been possible to determine the relative amount of FCC-Y and FCC-ZSM-5 in an artificial series of physical mixtures as well as in an Ecat sample with unknown composition. As a result, a new practical tool is introduced in the field of zeolite catalysis to evaluate FCC catalyst performances on the basis of photo-spectroscopic measurements with an off-the-shelf digital single lens reflex (DSLR) photo-camera with a macro lens. The results also demonstrate that there is an interesting time and cost trade-off between single catalyst particle studies, as performed with e.g. UV-vis, synchrotron-based IR and fluorescence micro-spectroscopy, and many catalyst particle photo-spectroscopy studies, making use of a relatively simple DSLR photo-camera. The latter approach offers clear prospects for the quality control of e.g. FCC catalyst manufacturing plants.

Core-Shell Zeolite Y@γ-Al2 O3 Nanorod Composites: Optimized Fluid Catalytic Cracking Catalyst Assembly for Processing Heavy Oil

ChemCatChem ◽  
2017 ◽  
Vol 9 (13) ◽  
pp. 2574-2583 ◽  
Author(s):  
Wenqian Jiao ◽  
Xuezhong Wu ◽  
Gang Li ◽  
Teng Xue ◽  
Yimeng Wang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Catalytic Cracking ◽  
Zeolite Y ◽  
Fluid Catalytic Cracking ◽  
Core Shell

Synthesis of zeolite Y from natural aluminosilicate minerals for fluid catalytic cracking application

2012 ◽  
Vol 14 (12) ◽  
pp. 3255 ◽  
Author(s):  
Tiesen Li ◽  
Haiyan Liu ◽  
Yu Fan ◽  
Pei Yuan ◽  
Gang Shi ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Zeolite Y ◽  
Fluid Catalytic Cracking ◽  
Natural Aluminosilicate
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