Catalytic cracking of methylcyclohexane over H-ZSM-5 zeolite and activated charcoal wall-coated microchannel reactor with wavy structure under supercritical conditions

2021 ◽  
Author(s):  
Byeong Jun Jeong ◽  
Min Chang Shin ◽  
Jung Hoon Park ◽  
Byung Hun Jeong ◽  
Hong Joo Lee ◽  
...  
Keyword(s):  
Activated Charcoal ◽  
Catalytic Cracking ◽  
Microchannel Reactor ◽  
Supercritical Conditions ◽  
Wavy Structure

scholarly journals Catalytic Cracking and Heat Sink Capacity of Aviation Kerosene Under Supercritical Conditions

2009 ◽  
Vol 25 (6) ◽  
pp. 1226-1232 ◽  
Author(s):  
X. J. Fan ◽  
F. Q. Zhong ◽  
G. Yu ◽  
J. G. Li ◽  
C. J. Sung
Keyword(s):  
Heat Sink ◽  
Catalytic Cracking ◽  
Supercritical Conditions ◽  
Aviation Kerosene ◽  
Sink Capacity

Catalytic cracking of binary hydrocarbons of n-dodecane and iso-dodecane under supercritical conditions

2015 ◽  
Vol 113 ◽  
pp. 133-136 ◽  
Author(s):  
Ya Wang ◽  
Xiaochao Xian ◽  
Xu Hou ◽  
Xiangwen Zhang ◽  
Li Wang ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Supercritical Conditions

Supercritical catalytic cracking of n-dodecane over air-oxidized activated charcoal

Fuel ◽  
2020 ◽  
Vol 276 ◽  
pp. 118010 ◽  
Author(s):  
Kyoung Ho Song ◽  
Soon Kwan Jeong ◽  
Ki Tae Park ◽  
Kwan-Young Lee ◽  
Hak Joo Kim
Keyword(s):  
Activated Charcoal ◽  
Catalytic Cracking

Synergistic effect of Fe and Ga incorporation into the ZSM-5 to increase propylene production in the cracking of n-hexane utilizing a microchannel reactor

2021 ◽  
Author(s):  
Mohsen Rostami Sakha ◽  
Saeed Soltanali ◽  
Darush Salari ◽  
Mehdi Rashidzadeh ◽  
Parya Halimi Tabrizi
Keyword(s):  
Experimental Design ◽  
Synergistic Effect ◽  
Catalytic Cracking ◽  
Microchannel Reactor ◽  
Propylene Production

In the present study, the effect of various amounts of Fe and Ga in the catalytic cracking of n-hexane in a microchannel reactor was investigated using the experimental design by...

Catalytic cracking of n-dodecane over HZSM-5 zeolite under supercritical conditions: Experiments and kinetics

2010 ◽  
Vol 65 (20) ◽  
pp. 5588-5604 ◽  
Author(s):  
Xiaochao Xian ◽  
Guozhu Liu ◽  
Xiangwen Zhang ◽  
Li Wang ◽  
Zhentao Mi
Keyword(s):  
Catalytic Cracking ◽  
Supercritical Conditions

Fluidized Catalytic Cracking Catalyst Microstructure as Determined by A Scanning Ion Microprobe

1990 ◽  
Vol 48 (2) ◽  
pp. 302-303
Author(s):  
J.K. Lampert ◽  
G.S. Koermer ◽  
J.M. Macaoy ◽  
J.M. Chabala ◽  
R. Levi-Setti
Keyword(s):  
Catalytic Cracking ◽  
Secondary Ion Mass Spectrometry ◽  
Fuel Oil ◽  
Ion Microprobe ◽  
Fluidized Catalytic Cracking ◽  
Ion Probe ◽  
Silica Alumina ◽  
Resolution Imaging ◽  
The University ◽  
High Spatial Resolution Imaging

We have used high spatial resolution imaging secondary ion mass spectrometry (SIMS) to differentiate mineralogical phases and to investigate chemical segregations in fluidized catalytic cracking (FCC) catalyst particles. The oil industry relies on heterogeneous catalysis using these catalysts to convert heavy hydrocarbon fractions into high quality gasoline and fuel oil components. Catalyst performance is strongly influenced by catalyst microstructure and composition, with different chemical reactions occurring at specific types of sites within the particle. The zeolitic portions of the particle, where the majority of the oil conversion occurs, can be clearly distinguished from the surrounding silica-alumina matrix in analytical SIMS images.The University of Chicago scanning ion microprobe (SIM) employed in this study has been described previously. For these analyses, the instrument was operated with a 40 keV, 10 pA Ga+ primary ion probe focused to a 30 nm FWHM spot. Elemental SIMS maps were obtained from 10×10 μm2 areas in times not exceeding 524s.

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.

HRTEM study of valleriite, a hydroxide-bearing copper sulfide

1990 ◽  
Vol 48 (4) ◽  
pp. 462-463
Author(s):  
S. Wang ◽  
P. R. Buseck
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Copper Sulfide ◽  
Carbonaceous Chondrite ◽  
Structural Data ◽  
Basic Structure ◽  
Long Period ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron ◽  
Wavy Structure

Valleriite is an unusual mineral, consisting of intergrowths of sulfide layers (corresponding in structure to the mineral smythite - Fe9S11) and hydroxide layers (corresponding to brucite - Mg(OH2)). It has a composition of approximately 1.526[Mg.68Al.32(OH)2].[Fe1.07Cu.93S2] and consists of two interpenetrating lattices, each of which retains its individual structural and diffraction characteristics parallel to the layering. The valleriite structure is related to that of tochilinite, an unusual iron-rich mineral that is of considerable interest for the origin of certain carbonaceous chondrite meteorites and to those of franckeite and cylindrite, two minerals that are of interest because of their unique morphological and crystallographic properties, e.g., the distinctive curved form of cylindrite and the perfect mica-like cleavage with unusual striations and the long-period wavy structure of franckeite.Our selected-area electron diffraction (SAED) patterns and high-resolution transmission electron microscope (HRTEM) images of valleriite provide new structural data. A basic structure and a new superstructure have been observed.

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