Simultaneous Removal of Sulfur and Nitrogen Compounds in the C4 Gas from Fluidized Catalytic Cracking Using Modified Activated Carbons

2011 ◽  
Vol 6 (3) ◽  
pp. 306-309 ◽  
Author(s):  
Jung Je Park ◽  
Chang Geun Park ◽  
Suk Yong Jung ◽  
Soo Chool Lee ◽  
Dhanusuraman Ragupathy ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Activated Carbons ◽  
Nitrogen Compounds ◽  
Simultaneous Removal ◽  
Fluidized Catalytic Cracking ◽  
Sulfur And Nitrogen Compounds ◽  
Modified Activated Carbons

scholarly journals Regeneration study of ecat-R as adsorbent for denitrogenation and desulfurization of diesel fuels

2020 ◽  
Vol 26 (3) ◽  
pp. 277-285
Author(s):  
de Valadares ◽  
Guimarães Bachmann ◽  
Rafael Vieira ◽  
Araújo de ◽  
de Jerônimo ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Specific Area ◽  
Nitrogen Adsorption ◽  
Nitrogen Compounds ◽  
X Ray ◽  
Adsorption Sites ◽  
The Third ◽  
Fluidized Catalytic Cracking ◽  
Third Stage ◽  
Sulfur And Nitrogen Compounds

The purpose of this paper is to present the third stage of regeneration for ecat: deactivated or equilibrium catalysts which are waste from fluidized catalytic cracking (FCC) units. This stage is going to compose a complete circular economy (CE) model and increase the life cycle of the catalyst. The third stage of regeneration, after the adsorption process for sulfur and nitrogen compounds from real diesel, was assessed using as solvents: acetone (propanone), ethanol, benzene and toluene. For sulfur and nitrogen compounds, ethanol achieved the best performance. The variations of physical and chemical properties of regenerated ecats in the cycles of adsorption and desorption were evaluated using x-ray diffraction, x-ray fluorescence, nitrogen adsorptiondesorpion, thermogravimetric and differential thermal analysis, scanning electron microscopy and Fourier-transform infrared spectroscopy. The recovery rate over four cycles is superior for sulfur compounds. After all cycles, ecat-R- -SA exhibited 5.09% reduction in the recovery for sulfur and 24.58% reduction in the recovery for nitrogen. The nitrogen adsorption-desorption analysis suggests the adsorption of compounds by ecat-R may be more correlated with the adsorption sites than with specific area. Overall, the results of this work are promising and allows for ecat to integrate a complete CE model.

Adsorption of heterocyclic sulfur and nitrogen compounds in liquid hydrocarbons on activated carbons modified by oxidation: capacity, selectivity and mechanism

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 41982-41990 ◽  
Author(s):  
Dong Qu ◽  
Xiao Feng ◽  
Na Li ◽  
Xiaoliang Ma ◽  
Chao Shang ◽  
...  
Keyword(s):  
Activated Carbons ◽  
Carbon Adsorbents ◽  
Nitrogen Compounds ◽  
Liquid Hydrocarbons ◽  
Oxidation Capacity ◽  
Sulfur And Nitrogen Compounds ◽  
Careful Design

Careful design and modification of carbon adsorbents was performed to selectively remove undesired compounds from liquid hydrocarbons.

Y zeolite equilibrium catalyst waste from fluidized catalytic cracking regenerated by electrokinetic treatment: An adsorbent for sulphur and nitrogen compounds

2018 ◽  
Vol 96 (12) ◽  
pp. 2593-2601
Author(s):  
Thamayne Valadares de Oliveira ◽  
Renata Bachmann Guimarães Valt ◽  
Haroldo de Araújo Ponte ◽  
Maria José Jerônimo de Santana Ponte ◽  
Carlos Itsuo Yamamoto ◽  
...  
Keyword(s):  
Catalytic Cracking ◽  
Nitrogen Compounds ◽  
Y Zeolite ◽  
Electrokinetic Treatment ◽  
Fluidized Catalytic Cracking ◽  
Equilibrium Catalyst

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.

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