Scope of Metal Loaded Microporous Zeolite-Y as Catalyst in Ozone Initiated Oxidation of n-hexadecane

2009 ◽  
Vol 12 (2) ◽  
Author(s):  
V. S. R. Rajasekhar Pullabhotla ◽  
S. B. Jonnalagadda
Keyword(s):  
Metal Ion ◽  
Zeolite Catalyst ◽  
Catalyst Surface ◽  
Zeolite Y ◽  
Y Zeolite ◽  
Substrate Molecule ◽  
Zeolite Support ◽  
Active Intermediate ◽  
Plausible Mechanism ◽  
Microporous Zeolite

AbstractThe efficiency of metal loaded microporous materials, zeolite-Y as catalysts in the ozone initiated oxy-functionalisation of long chained n-alkanes is investigated at moderate temperature (20 ± 1 °C) and pressure conditions (1 atm.). The efficiencies of 0.5% Pd, Ni, V and U loaded microporous zeolite-Y catalysts on ozonation of higher alkanes (n-hexadecane), with respect to the conversion and transformation towards keto products are compared. In the catalysed ozonation, n-hexadecane is converted to 4-, 3- and 2- keto isomers as major products with varied selectivity and % conversions. A plausible mechanism assuming the chemisorption of the substrate molecule on the catalyst surface and further electron transfer between the metal ion loaded on the zeolite support and the active intermediate formed in course of reaction for the ozone initiated oxidation of n-hexadecane with heterogeneous Ni loaded Na-Y zeolite catalyst is proposed.

scholarly journals Preparation, Characterization, and Activation of Co-Mo/Y Zeolite Catalyst for Coal Tar Conversion to Liquid Fuel

2017 ◽  
Vol 12 (2) ◽  
pp. 219 ◽  
Author(s):  
Didi Dwi Anggoro ◽  
Luqman Buchori ◽  
Giveni Christina Silaen ◽  
Resti Nur Utami
Keyword(s):  
Liquid Fuel ◽  
Zeolite Catalyst ◽  
Zeolite Y ◽  
Coal Tar ◽  
Hydrogen Gas ◽  
Total Acidity ◽  
Y Zeolite ◽  
Characteristic Analysis ◽  
Impregnation Time ◽  
Impregnation Temperature

One of many efforts to convert coal tar into alternative liquid fuel is by hydrocracking. This research aims to determine the impregnation of Co-Mo/Y zeolite, its characteristics, the effect of impregnation temperature and time, and also the best Co-Mo/Y zeolite impregnation condition for the conversion of coal tar. This research was conducted in several steps, impregnating Co from Co(NO3)2.6H2O and Mo from (NH4)6Mo7O24.4H2O into Zeolite Y in liquid media, drying at 100 °C for 24 hours, and calcination at 550 °C for 3 hours. Coal tar was then reacted with hydrogen gas (as a reactant), and Co-Mo/Zeolite Y (as a catalyst) was conducted at 350 °C. Characteristic analysis showed that Co and Mo had impregnated into the Y zeolite, as well as it made no change of catalyst’s structure and increased the total acidity. The higher of impregnation temperature was increased the catalyst crystallinity, total acidity, and yield of gasoline. The longer impregnation time was reduced crystallinity value, but total acidity and yield were increased. GC analysis showed that products included into the gasoline product (C8, C9, and C10). Copyright © 2017 BCREC Group. All rights reservedReceived: 13rd November 2016; Revised: 12nd February 2017; Accepted: 16th February 2017How to Cite: Anggoro, D.D., Buchori, L., Silaen, G.C., Utami, R.N. (2017). Preparation, Characterization, and Activation of Co-Mo/Y Zeolite Catalyst for Coal Tar Conversion to Liquid Fuel. Bulletin of Chemical Reaction Engineering & Catalysis, 12 (2): 219-226 (doi:10.9767/bcrec.12.2.768.219-226)Permalink/DOI: http://dx.doi.org/10.9767/bcrec.12.2.768.219-226 

Comparison of Isobutane/n-Butenes Alkylation over Y-Zeolite Catalyst in CSTR, Fixed Bed and Circulating Flow Reactors

2020 ◽  
Vol 10 (1-2) ◽  
pp. 58-72
Author(s):  
D. A. Sladkovskiy ◽  
K. V. Semikin ◽  
A. V. Utemov ◽  
S. P. Fedorov ◽  
E. V. Sladkovskaya ◽  
...  
Keyword(s):  
Zeolite Catalyst ◽  
Fixed Bed ◽  
Y Zeolite ◽  
Flow Reactors

Conversion of trimethylbenzenes over Y-zeolite catalyst

Zeolites ◽  
1987 ◽  
Vol 7 (3) ◽  
pp. 231-234 ◽  
Author(s):  
S. Mikhail ◽  
S.M. Ayoub ◽  
Y. Barakat
Keyword(s):  
Zeolite Catalyst ◽  
Y Zeolite

scholarly journals Ultra-sound assisted nano Y- zeolite /Mn adsorbent to removed sulfur from crude oil

2021 ◽  
Vol 12 (3) ◽  
pp. 5652-5657
Author(s):  
Dr.Tahseen Hameed khlaif Et. al.
Keyword(s):  
Crude Oil ◽  
Zeolite Y ◽  
Sulfur Compounds ◽  
Ultra Sound ◽  
Adsorption Efficiency ◽  
Y Zeolite ◽  
Industrial Materials ◽  
Oil Sector ◽  
Great Harm ◽  
Adsorbent Dose

There are some types of crude oil that contains large quantities of various sulfur compounds that have great harm on the environment, oil economy, oil sector facilities such as fields and refineries.So developing ways to get rid of it is one of the most important goals of researchers in this sector. In this study, nanotechnology was used for environmentally friendly and available industrial materials (nano-zeolite Y), which can adsorb sulfur from crude oil, especially when it impregnated with manganese metals with ultrasound to increase the adsorption efficiency.  The effect (temperature, adsorbent dose, Samples PH) was studied with ultrasound and without ultrasound.On the efficiency of removal had best results with ultrasound andit was found that this material is highly efficient in removing sulfur compounds, especially at a temperature of 100 C, and at a dose of 13 g, and PH 7 it found the best adsorption efficiency about 99 %. The change in the properties of the adsorbent material is almost non-existent, with a change in the surface area and pore size.

scholarly journals Sustainable Production of Hydrogen by Steam Reforming of Ethanol Using Cobalt Supported on Nanoporous Zeolitic Material

Nanomaterials ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1934
Author(s):  
Javier Francisco da Costa-Serra ◽  
Maria Teresa Navarro ◽  
Fernando Rey ◽  
Antonio Chica
Keyword(s):  
Steam Reforming ◽  
Zeolite Y ◽  
Cobalt Catalysts ◽  
Coke Deposition ◽  
Bet Surface Area ◽  
Ethanol Conversion ◽  
Y Zeolite ◽  
Steam Reforming Of Ethanol ◽  
Production Of Hydrogen ◽  
Hydrogen Selectivity

Cobalt catalysts supported on Y zeolite and mesoporized Y zeolite (Y-mod) have been studied in steam reforming of ethanol (SRE). Specifically, the effect of the mesoporosity and the acidity of the y zeolite as a support has been explored. Mesoporous were generated on Y zeolite by treatment with NH4F and the acidity was neutralized by Na incorporation. Four cobalt catalysts supported on Y zeolite have been prepared, two using Y zeolite without mesoporous (Co/Y, Co/Y-Na), and two using Y zeolite with mesoporous (Co/Y-mod and Co/Y-mod-Na). All catalysts showed a high activity, with ethanol conversion values close to 100%. The main differences were found in the distribution of the reaction products. Co/Y and Co/Y-mod catalysts showed high selectivity to ethylene and low hydrogen production, which was explained by their high acidity. On the contrary, neutralization of the acid sites could explain the higher hydrogen selectivity and the lower ethylene yields exhibited by the Co/Y-Na and Co/Y-mod-Na. In addition, the physicochemical characterization of these catalysts by XRD, BET surface area, temperature-programmed reduction (TPR), and TEM allowed to connect the presence of mesoporous with the formation of metallic cobalt particles with small size, high dispersion, and with high interaction with the zeolitic support, explaining the high reforming activity exhibited by the co/y-mod-Na sample as well as its higher hydrogen selectivity. It has been also observed that the formation of coke is affected by the presence of mesoporous and acidity. Both properties seem to have an opposite effect on the reforming catalyst, decreasing and increasing the coke deposition, respectively.

scholarly journals Cellulose nanocrystals (CNCs) as hard templates for preparing mesoporous zeolite Y assemblies with high catalytic activity

2020 ◽  
Vol 22 (15) ◽  
pp. 5115-5122 ◽  
Author(s):  
Samer Abdulridha ◽  
Jiuxing Jiang ◽  
Shaojun Xu ◽  
Zhaoxia Zhou ◽  
He Liang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Cellulose Nanocrystals ◽  
Zeolite Y ◽  
Synthesis Method ◽  
High Catalytic Activity ◽  
Mesoporous Zeolite ◽  
Y Zeolite ◽  
Directed Synthesis

Faujasite (FAU) Y zeolite assemblies with high mesoporosity (Sext = 347 m2 g−1 and Vmeso = 0.52 cm3 g−1) were synthesised using sustainable and economic cellulose nanocrystals (CNCs) via a template-directed synthesis method.

scholarly journals Graphene Nanoplatelets-Based Ni-Zeolite Composite Catalysts for Heptane Hydrocracking

2020 ◽  
Vol 6 (2) ◽  
pp. 31
Author(s):  
Roba Saab ◽  
Kyriaki Polychronopoulou ◽  
Nikolaos Charisiou ◽  
Maria A. Goula ◽  
Andreas Schiffer
Keyword(s):  
Water Adsorption ◽  
Catalyst Surface ◽  
Zeolite Y ◽  
Graphene Nanoplatelets ◽  
Bet Surface Area ◽  
Composite Catalysts ◽  
Texture Characteristics ◽  
Hydrophobic Nature ◽  
Two Temperatures ◽  
Zeolite Composite

This paper examines the effect of incorporating graphene nanoplatelets (GNPs) in an Ni-based/Zeolite-Y catalyst on the hydrocracking of heptane fuel at two temperatures, 350 and 400 °C. Specifically, reduced GNP/NiO-ZY and NiO-ZY catalysts, each with a 5 wt. % Ni loading, were compared in this study. The results show that the reduced GNP/NiO-ZY enhanced the conversion percentage by 31% at 350 °C and by 6% at 400 °C as compared with the reduced NiO-ZY, and the GNP/NiO-ZY also showed superior stability, reporting a less than 2% drop in conversion over 20 h of time-on-stream. The enhancement in performance is linked to the surface and texture characteristics of both catalysts. Although the calcined GNP/NiO-ZY possessed a lower Brunauer–Emmett–Teller (BET) surface area of 458 m2/g compared with 536 m2/g for the calcined NiO-ZY, it showed a more hydrophobic nature, as deduced from the water adsorption profiles, which corroborates the hypothesis that the increased affinity between the catalyst surface and heptane molecules during the reaction leads to an improved catalytic activity.

Experimental and computational studies on zeolite-Y encapsulated iron(iii) and nickel(ii) complexes containing mixed-ligands of 2,2′-bipyridine and 1,10-phenanthroline

RSC Advances ◽  
2015 ◽  
Vol 5 (108) ◽  
pp. 88636-88645 ◽  
Author(s):  
Solomon Legese Hailu ◽  
Balachandran Unni Nair ◽  
Mesfin Redi-Abshiro ◽  
Rathinam Aravindhan ◽  
Isabel Diaz ◽  
...  
Keyword(s):  
Metal Ion ◽  
Zeolite Y ◽  
Mixed Ligand ◽  
Mixed Ligand Complexes ◽  
Computational Studies ◽  
Mixed Ligands ◽  
Flexible Ligands

Mixed ligand complexes of 2,2′-bipyridine and 1,10-phenanthroline with iron(iii) and nickel(ii) have been encapsulated into a zeolite cage by the reaction of zeolite exchanged metal ion with flexible ligands.

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