Role of zeolite content in Ni-Mo/β-USY zeolite catalyst on hydrocracking of n-hexadecane and vacuum gas oil in a batch reactor and a fixed-bed reactor

2021 ◽  
pp. 1-8
Author(s):  
M. Hadi ◽  
H.R. Bozorgzadeh ◽  
H.R. Aghabozorg ◽  
M.R. Ghasemi
Keyword(s):  
Fixed Bed ◽  
Zeolite Catalysts ◽  
The Other ◽  
Fixed Bed Reactor ◽  
Vacuum Gas Oil ◽  
Impregnation Method ◽  
Gas Oil ◽  
Usy Zeolite ◽  
Silica Alumina ◽  
Temperature Programmed

In this paper, different materials that involved amorphous silica–alumina and hydrothermally synthesized beta zeolite and treated Y zeolite (USY) were introduced as parts of the hydrocracking catalyst supports. The prepared supports were used for preparation of Ni-Mo/silica alumina–zeolite catalysts by wetness impregnation method. The prepared catalysts were characterized by BET, temperature programmed desorption (TPD), temperature programmed reduction (TPR), and field emission – scanning electron microscopy (FE–SEM) methods. Effect of zeolite type and content on hydrocracking of n-hexadecane and vacuum gas oil in a batch and a fixed-bed reactor was investigated. Also, the content of coke formed after reaction was measured by thermal gravimetric methods (TGA). Hydrocracking was done at 400 °C and 55 bar. The hydrocracking of vacuum gas oil results showed that in the Ni-Mo/10B-30USY catalyst containing higher USY zeolite with high total acidity, selectivity to middle distillate was higher than the other (90%). Moreover, the Ni-Mo/10B-30USY catalyst in hydrocracking of n-hexadecane had a higher yield (82%) and was more selective to heavier products (C9–C12). The findings indicated that in the Ni-Mo/10B-30USY catalyst, coke content was more than the other due to high acidity.

scholarly journals The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst

2018 ◽  
Vol 13 (3) ◽  
pp. 543
Author(s):  
Mina Hadi ◽  
Hamid Reza Aghabozorg ◽  
Hamid Reza Bozorgzadeh ◽  
Mohammad Reza Ghasemi
Keyword(s):  
Fixed Bed ◽  
Diffraction Method ◽  
Acid Sites ◽  
Fixed Bed Reactor ◽  
Beta Zeolite ◽  
Impregnation Method ◽  
Gas Oil ◽  
Hydrocracking Catalyst ◽  
Silica Alumina ◽  
Temperature Programmed

In this paper, three different kinds of aluminum sources (sodium aluminate, aluminum sulfate and aluminum isopropylate) were used for preparing of nano beta-zeolite. The as synthesized zeolites were mixed with the as prepared amorphous silica-alumina to produce the supports for hydrocracking catalyst. The prepared supports were used for preparation of NiMo/silica alumina-nano beta-zeolite by impregnation method. The influence of the aluminum source for preparation of beta-zeolite on the performance of the prepared catalysts has been studied. The samples were thoroughly characterized by X-Ray diffraction method (XRD), field emission-scanning electron microscopy (FE-SEM), N2 adsorption-desorption isotherms (BET), temperature programmed desorption (TPD) and temperature programmed reduction (TPR) methods. The catalysts performance was evaluated by vacuum gas oil (VGO) hydrocracking at 390 oC in a fixed bed reactor. The XRD patterns showed that the beta-zeolite samples obtained from the present methods were pure and highly crystalline and the crystal size of the prepared zeolites were in nanometer scale. Crystallite size of nano beta-zeolite synthesized by aluminum isopropylate [Al(iPrO)3] was smaller than those of prepared by the other aluminum sources. The catalyst containing this zeolite with higher surface area (231 m2/g) and more available acid sites (1.66 mmol NH3/g) possessed higher activity and selectivity to gas oil (71.9 %). Copyright © 2018 BCREC Group. All rights reservedReceived: 25th April 2018; Revised:22nd July 2018; Accepted: 29th July 2018How to Cite: Hadi, M., Aghabozorg, H.R., Bozorgzadeh, H.R., Ghasemi, M.R. (2018). The Effect of Aluminum Source on Performance of Beta-Zeolite as a Support for Hydrocracking Catalyst. Bulletin of Chemical Reaction Engineering & Catalysis, 13 (3): 543-552 (doi:10.9767/bcrec.13.3.2570.543-552)Permalink/DOI: https://doi.org/10.9767/bcrec.13.3.2570.543-552 

scholarly journals Tungsten Oxide-Modified SSZ-13 Zeolite as an Efficient Catalyst for Ethylene-To-Propylene Reaction

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 553
Author(s):  
Mansurbek Urol ugli Abdullaev ◽  
Sungjune Lee ◽  
Tae-Wan Kim ◽  
Chul-Ung Kim
Keyword(s):  
Tungsten Oxide ◽  
Fixed Bed ◽  
Acid Sites ◽  
Fixed Bed Reactor ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Efficient Catalyst ◽  
X Ray ◽  
Propylene Selectivity ◽  
Temperature Programmed

Among the zeolitic catalysts for the ethylene-to-propylene (ETP) reaction, the SSZ-13 zeolite shows the highest catalytic activity based on both its suitable pore architecture and tunable acidity. In this study, in order to improve the propylene selectivity further, the surface of the SSZ-13 zeolite was modified with various amounts of tungsten oxide ranging from 1 wt% to 15 wt% via a simple incipient wetness impregnation method. The prepared catalysts were characterized with several analysis techniques, specifically, powder X-ray diffraction (PXRD), Raman spectroscopy, temperature-programmed reduction of hydrogen (H2-TPR), temperature-programmed desorption of ammonia (NH3-TPD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and N2 sorption, and their catalytic activities were investigated in a fixed-bed reactor system. The tungsten oxide-modified SSZ-13 catalysts demonstrated significantly improved propylene selectivity and yield compared to the parent H-SSZ-13 catalyst. For the tungsten oxide loading, 10 wt% loading showed the highest propylene yield of 64.9 wt%, which was 6.5 wt% higher than the pristine H-SSZ-13 catalyst. This can be related to not only the milder and decreased strong acid sites but also the diffusion restriction of bulky byproducts, as supported by scanning transmission electron microscopy-energy dispersive X-ray spectroscopy (STEM-EDS) observation.

scholarly journals Effect of CO2 partial pressure on dry reforming of ethanol for hydrogen production

2018 ◽  
Vol 1 (1) ◽  
pp. 6-10
Author(s):  
Fahim Fayaz ◽  
Ahmad Ziad Sulaiman ◽  
Sharanjit Singh ◽  
Sweeta Akbari
Keyword(s):  
Partial Pressure ◽  
Fixed Bed ◽  
Dry Reforming ◽  
Fixed Bed Reactor ◽  
Bet Surface Area ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
Co2 Partial Pressure ◽  
Temperature Programmed ◽  
Al2o3 Catalyst

The effect of CO2 partial pressure on ethanol dry reforming was evaluated over 5%Ce-10%Co/Al2O3 catalyst at = PCO2 = 20-50 kPa, PC2H5OH = 20 kPa, reaction temperature of 973 K under atmospheric pressure. The catalyst was prepared by using impregnation method and tested in a fixed-bed reactor. X-ray diffraction measurements studied the formation of Co3O4, spinel CoAl2O4 and CeO2, phases on surface of 5%Ce-10%Co/Al2O3 catalyst. CeO2, CoO and Co3O4 oxides were obtained during temperature–programmed calcination. Ce-promoted 10%Co/Al2O3 catalyst possessed high BET surface area of 137.35 m2 g-1. C2H5OH and CO2 conversions was improved with increasing CO2 partial pressure from 20-50 kPa whilst the optimal selectivity of H2 and CO was achieved at 50 kPa.

scholarly journals Computational Fluid Dynamic Modeling and Simulation of Hydrocracking of Vacuum Gas Oil in a Fixed-Bed Reactor

ACS Omega ◽  
2020 ◽  
Vol 5 (27) ◽  
pp. 16595-16601 ◽  
Author(s):  
Davood Faraji ◽  
Samyar Zabihi ◽  
Mahdi Ghadiri ◽  
Sepehr Sadighi ◽  
Ali Taghvaie Nakhjiri ◽  
...  
Keyword(s):  
Modeling And Simulation ◽  
Dynamic Modeling ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Computational Fluid Dynamic Modeling

scholarly journals Hydrocracking of a Heavy Vacuum Gas Oil with Fischer–Tropsch Wax

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5497
Author(s):  
Olga Pleyer ◽  
Dan Vrtiška ◽  
Petr Straka ◽  
Aleš Vráblík ◽  
Jan Jenčík ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Positive Influence ◽  
Oil Refinery ◽  
Fixed Bed Reactor ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Fischer Tropsch ◽  
Heavy Petroleum ◽  
Liquid Products ◽  
Heavy Vacuum Gas Oil

Catalytic hydrocracking represents an optimal process for both heavy petroleum fractions and Fischer–Tropsch (FT) wax upgrading because it offers high flexibility regarding the feedstock, reaction conditions and products’ quality. The hydrocracking of a heavy vacuum gas oil with FT wax was carried out in a continuous-flow catalytic unit with a fixed-bed reactor and a co-current flow of the feedstock and hydrogen at the reaction temperatures of 390, 400 and 410 °C and a pressure of 8 MPa. The increasing reaction temperature and content of the FT wax in the feedstock caused an increasing yield in the gaseous products and a decreasing yield in the liquid products. The utilisation of the higher reaction temperatures and feedstocks containing the FT wax showed a positive influence on the conversion of the fraction boiling above 400 °C to lighter fractions. Although the naphtha and middle distillate fractions obtained via atmospheric and vacuum distillations of the liquid products of hydrocracking did not comply with the particular quality standards of automotive gasolines and diesel fuels, the obtained products still present valuable materials which could be utilised within an oil refinery and in the petrochemical industry.

scholarly journals Characterization and Performance Test of Palm Oil Based Bio-Fuel Produced Via Ni/Zeolite-Catalyzed Cracking Process

2015 ◽  
Vol 4 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Sri Kadarwati ◽  
Sri Wahyuni
Keyword(s):  
Palm Oil ◽  
Catalytic Cracking ◽  
Performance Test ◽  
Fixed Bed ◽  
Gasoline Fraction ◽  
Zeolite Catalysts ◽  
Fixed Bed Reactor ◽  
Impregnation Method ◽  
And Performance ◽  
Cracking Process

Catalytic cracking process of palm oil into bio-fuel using Ni/zeolite catalysts (2-10% wt. Ni) at various reaction temperatures (400-500oC) in a flow-fixed bed reactor system has been carried out. Palm oil was pre-treated to produce methyl ester of palm oil as feedstock in the catalytic cracking reactions. The Ni/zeolite catalysts were prepared by wetness impregnation method using Ni(NO3)2.6H2O as the precursor. The products were collected and analysed using GC, GC-MS, and calorimeter. The effects of process temperatures and Ni content in Ni/zeolite have been studied. The results showed that Ni-2/zeolite could give a yield of 99.0% at 500oC but only produced gasoline fraction of 18.35%. The physical properties of bio-fuel produced in this condition in terms of density, viscosity, flash point, and specific gravity were less than but similar to commercial fuel. The results of performance test in a 4-strike engine showed that the mixture of commercial gasoline (petrol) and bio-fuel with a ratio of 9:1 gave similar performance to fossil-based gasoline with much lower CO and O2 emissions and more efficient combustion

Vacuum Gas Oil Hydrocracking on NiMo/USY Zeolite Catalysts. Experimental Study and Kinetic Modeling

2015 ◽  
Vol 54 (3) ◽  
pp. 858-868 ◽  
Author(s):  
Tao Zhang ◽  
Carolina Leyva ◽  
Gilbert F. Froment ◽  
Jorge Martinis
Keyword(s):  
Experimental Study ◽  
Kinetic Modeling ◽  
Zeolite Catalysts ◽  
Vacuum Gas Oil ◽  
Gas Oil ◽  
Usy Zeolite

Activity of Copper and Nickel Loaded on HZSM-5Zeolite Based Catalyst for Steam Reforming of Glycerol to Hydrogen

2014 ◽  
Vol 699 ◽  
pp. 504-509
Author(s):  
Hafizah Abdul Halim Yun ◽  
Ramli Mat ◽  
Tuan Amran Tuan Abdullah ◽  
Mahadhir Mohamed ◽  
Anwar Johariand Asmadi Ali
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Fixed Bed ◽  
Operating Conditions ◽  
Zeolite Catalysts ◽  
Fixed Bed Reactor ◽  
Molar Ratio ◽  
Hydrogen Yield ◽  
Impregnation Method ◽  
Glycerol Conversion

The study focuses on hydrogen production via glycerol steam reforming over copper and nickel loaded on HZSM-5 zeolite based catalyst. The catalysts were prepared by using different loading amount of copper (0-10wt%) and nickel (0-10wt%) on HZSM-5 zeolite catalysts through wet impregnation method and was characterized by X-Ray Diffraction (XRD). The performances of catalysts were evaluated in terms of glycerol conversion and hydrogen production at 500°C using 6:1 of water to glycerol molar ratio (WGMR) in a tubular fixed bed reactor. All the catalysts had achieved more than 85% of glycerol conversion except that of 5%Cu loaded on HZSM-5 catalyst. The addition of nickel into 5% Cu/HZSM-5 catalyst had increased the hydrogen yield. Similar trend was observed when copper was added into Ni/HZSM-5 catalyst but using copper loaded on HZSM-5 alone was unable to produce hydrogen compared to using nickel catalyst alone. It showed that copper acted as a promoter for hydrogen production. It was established that a 5wt% of Cu with 10wt% of Ni loaded on HZSM-5 catalyst showed significant improvement in terms of hydrogen yield and gaseous product compositions at selected operating conditions.

scholarly journals The Effect of Metal Loading and Alkaline Treatment on The Zeolites Toward Catalytic Pyrolysis of γ-Valerolactone

2018 ◽  
Vol 156 ◽  
pp. 06002
Author(s):  
Carolus Borromeus Rasrendra ◽  
Muhammad Luthfi ◽  
Vika Asriani ◽  
Jenny Rizkiana ◽  
Muhammad A Kariem ◽  
...  
Keyword(s):  
Catalytic Pyrolysis ◽  
Performance Test ◽  
Negative Impact ◽  
Fixed Bed ◽  
Alkaline Treatment ◽  
Fixed Bed Reactor ◽  
Impregnation Method ◽  
Average Pore ◽  
Naoh Solution ◽  
Silica Alumina

γ-Valerolactone (GVL) is a glucose derivatives and its utilization as organic solvent has been developed to extract lignin from biomass. Both GVL and lignin can be used for producing aromatic chemicals (Bezene, Toluene, Xylene – BTX) via catalytic pyrolysis. We present a study focused on the catalyst modification of the zeolites to produce BTX from GVL. The catalysts were modified using wet impregnation method and alkaline treatment using NaOH solution. The addition of metal oxides were examined. Catalyst performance test were carried out in a fixed bed reactor. The feed was flowed at flowrate of 0.2 ml/min in 50 ml/min N2. The operating temperature was maintained at 500°C with catalyst-to-GVL ratio of 1:1.5. The results showed that adition of Fe-metal improves zeolites activity compared with parent zeolites. Alkaline treatment had negative impact on HZSM-5 activity because of the change of silica-alumina-ratio (SAR) and average pore diameter.

scholarly journals Oleylamine-modified impregnation method for the preparation of a highly efficient Ni/SiO2 nanocatalyst active in the partial oxidation of methane to synthesis gas

2017 ◽  
Vol 23 (2) ◽  
pp. 259-267
Author(s):  
Davarani Hosseini ◽  
Hassan Hashemipour ◽  
Alireza Talebizadeh
Keyword(s):  
Partial Oxidation ◽  
Fixed Bed ◽  
Catalytic Performance ◽  
Partial Oxidation Of Methane ◽  
Fixed Bed Reactor ◽  
High Catalytic Activity ◽  
Impregnation Method ◽  
Oxidation Of Methane ◽  
Temperature Programmed ◽  
H2 Yield

In this research, a novel modified wet impregnation method has been successfully developed to synthesize 5% Ni/SiO2 nanocatalyst with high catalytic activity and stability for the partial oxidation of methane. Oleylamine was used as a capping agent in the impregnation solution to improve Ni dispersion and interaction with silica surfaces. The product was analyzed and characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, N2 physisorption measurement and transmission electron microscopy (TEM) and temperature- -programmed H2 reduction (H2-TPR). Partial oxidation of methane over the modified catalyst was performed in a continues-flow fixed-bed reactor under atmospheric pressure at 700?C. The modified catalyst showed 91% CH4 conversion, 86% H2 yield and 95% CO selectivity, and these results almost remained constant within 5 h reaction on stream. The excellent catalytic performance of the catalyst was reasonably attributed to the small and uniform distribution of Ni nanoparticles on the support, and structural characterization confirmed this conclusion.

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