Hydrocracking of petroleum gas oil over NiW/MCM-48-USY composite catalyst

Alsobaai, Ahmed Mubarak; Zakaria, Rahimah; Hameed, B.H.

doi:10.1016/j.fuproc.2007.05.001

Cited by 27 publications

(15 citation statements)

References 20 publications

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“…In particular, hydrocracking process is of great importance to meet the growing demand for highquality middle distillate requiring stringent specifications [4]. Although crude oil has been traditionally used as a heavy hydrocarbon source for the production of middle distillate [5], Fischer-Tropsch (F-T) wax has also attracted much attention as an alternate feed for the production of middle distillate [6].…”

Section: Introductionmentioning

confidence: 99%

Production of Middle Distillate Through Hydrocracking of Paraffin Wax over NiMo/SiO2–Al2O3 Catalysts: Effect of SiO2–Al2O3 Composition on Acid Property and Catalytic Performance of NiMo/SiO2–Al2O3 Catalysts

et al. 2008

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SiO 2 -Al 2 O 3 supports with different composition were prepared by a precipitation method in order to control the acid property of SiO 2 -Al 2 O 3 supports. NiMo/ SiO 2 -Al 2 O 3 catalysts were then prepared by an impregnation method and sulfided for use in the production of middle distillate through hydrocracking of paraffin wax. It was revealed that MoS 2 phase was dominantly formed in the NiMo/SiO 2 -Al 2 O 3 catalysts, while Ni-Mo-S phase was not detected due to its fine dispersion. Acidity of NiMo/SiO 2 -Al 2 O 3 catalysts measured by NH 3 -TPD experiments showed a volcano-shaped curve with respect to SiO 2 content. Acidity of the catalysts played an important role in determining the catalytic performance in the hydrocracking of paraffin wax. Conversion of paraffin wax was monotonically increased with increasing acidity of the catalyst, while yield for middle distillate showed a volcano-shaped curve with respect to acidity of the catalyst. Thus, optimal acidity of NiMo/SiO 2 -Al 2 O 3 catalysts was required for the maximum production of middle distillate through hydrocracking of paraffin wax.

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Section: Introductionmentioning

confidence: 99%

Production of Middle Distillate Through Hydrocracking of Paraffin Wax over NiMo/SiO2–Al2O3 Catalysts: Effect of SiO2–Al2O3 Composition on Acid Property and Catalytic Performance of NiMo/SiO2–Al2O3 Catalysts

et al. 2008

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“…The samples were dried overnight at 105°C and degassed for 12 hours under vacuum at a temperature of 300°C using the ASAP2000 instrument before measurements were performed (Alsobaai et al 2007a). Powder X-ray diffraction (XRD) patterns of prepared materials were obtained using a D5000 X-ray diffractometer (Siemens, Munich, Germany) with CuKα radiation (λ = 1.54056 Å) at 40 kV and 30 mA and a scanning speed of 2 degrees per minute (Alsobaai et al, 2007b).…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

Alsobaai¹

2017

Jou. Eng. Res.

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This work investigated the nitrous oxide (NOx) storage process using alumina-based catalysts (K 2 O/Al 2 O 3 , CaO/Al 2 O 3, and BaO/Al 2 O 3 ). The feed was a synthetic exhaust gas containing 1,000 ppm of nitrogen monoxide (NO), 1,000 ppm i-C 4 H 10 , and an 8% O 2 and N 2 balance. The catalyst was carried out at temperatures between 250-450°C and a contact time of 20 minutes. It was found that NOx was effectively adsorbed in the presence of oxygen. The NOx storage capacity of K 2 O/Al 2 O 3 was higher than that of BaO/Al 2 O 3. The NOx storage capacity for K 2 O/Al 2 O 3 decreased with increasing temperature and achieved a maximum at 250°C. Potassium loading higher than 15% in the catalyst negatively affected the morphological properties. The combination of Ba and K loading in the catalyst led to an improvement in the catalytic activity compared to its single metal catalysts. As a conclusion, mixed metal oxide was a potential catalyst for de-NOx process in meeting the stringent diesel engine exhaust emissions regulations. The catalysts were characterized by a number of techniques and measurements, such as X-ray diffraction (XRD), electron affinity (EA), a scanning electron microscope (SEM), Brunner-Emmett-Teller (BET) to measure surface area, and pore volume and pore size distribution assessments.

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“…These processes change the transesterified product to resemble conventional fuel derived from fossil sources [5]. This paper focuses on the preparation of catalysts for the hydrocracking process, which is one of the key processes to convert heavy feedstocks to high-quality fuels like gasoline and middle distillate [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The role and importance of catalysts in the hydrocracking processes has been intensely studied [14][15][16][17][18][19][20][21][22][23][24][25][26][27]. Generally, the hydrocracking catalysts composed of noble metals or transition metals paired with a mesoporous support have dual functions in the reaction process.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Mesoporous Silica-Supported Palladium Catalysts for Biofuel Upgrade

Ling

Reddy

Hill

et al. 2012

Journal of Nanotechnology

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We report the preparation of two hydrocracking catalysts Pd/CoMoO 4 /silica and Pd/CNTs/CoMoO 4 /silica (CNTs, carbon nanotubes). The structure, morphologies, composition, and thermal stability of catalysts were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, transmission electron microscopy (TEM), energy-dispersive X-ray (EDX), and thermogravimetric analysis (TGA). The catalyst activity was measured in a Parr reactor with camelina fatty acid methyl esters (FAMEs) as the feed. The analysis shows that the palladium nanoparticles have been incorporated onto mesoporous silica in Pd/CoMoO 4 /silica or on the CNTs surface in Pd/CNTs/CoMoO 4 /silica catalysts. The different combinations of metals and supports have selective control cracking on heavy hydrocarbons.

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Hydrocracking of petroleum gas oil over NiW/MCM-48-USY composite catalyst

Cited by 27 publications

References 20 publications

Production of Middle Distillate Through Hydrocracking of Paraffin Wax over NiMo/SiO2–Al2O3 Catalysts: Effect of SiO2–Al2O3 Composition on Acid Property and Catalytic Performance of NiMo/SiO2–Al2O3 Catalysts

Production of Middle Distillate Through Hydrocracking of Paraffin Wax over NiMo/SiO2–Al2O3 Catalysts: Effect of SiO2–Al2O3 Composition on Acid Property and Catalytic Performance of NiMo/SiO2–Al2O3 Catalysts

Storage of Nitrous Oxide (NOx) in Diesel Engine Exhaust Gas using Alumina-Based Catalysts: Preparation, Characterization, and Testing

Preparation of Mesoporous Silica-Supported Palladium Catalysts for Biofuel Upgrade

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