Synthesis, characterization and catalytic properties of NiMo/Al2O3–MCM-41 catalyst for dibenzothiophene hydrodesulfurization

Silva–Rodrigo, R.; Hernández-López, F.; Martinez-Juarez, K.; Castillo-Mares, A.; Melo-Banda, J.A.; Olivas, A.; Ancheyta, Jorge; Rana, Mohan S.

doi:10.1016/j.cattod.2007.10.001

Cited by 30 publications

(23 citation statements)

References 13 publications

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“…Among them, AM 10 shows highest surface area (1244 m 2 g À1 ), narrow pore size (2.7 nm) and pore volume (2.37 cm 3 g À1 ). The incorporation effect of both meso-Al 2 O 3 and iron in the formation of Fe/AM 10 has been well established by 27 Al MAS NMR spectroscopy. X-Ray photoelectron spectroscopy study confirms the 2+ state of iron in Fe/AM 10 and also establishes the incorporation of meso-Al 2 O 3 and iron.…”

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confidence: 95%

“…The mesoporous support surprisingly shows high surface area as compared to pristine MCM-41. The incorporation of meso-Al 2 O 3 into the extraframework of MCM-41 through the silanol group is evidenced by FTIR, 27 Al MAS NMR and 29 Si MAS NMR spectroscopy. The result shows that Si/Al ratio 10 (AM 10) possesses improved textural properties as compared to AM 50 and AM 90.…”

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confidence: 99%

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Facile synthesis of mesoporous composite Fe/Al2O3–MCM-41: an efficient adsorbent/catalyst for swift removal of methylene blue and mixed dyes

Pradhan

Parida

2012

J. Mater. Chem.

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confidence: 95%

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confidence: 99%

Facile synthesis of mesoporous composite Fe/Al2O3–MCM-41: an efficient adsorbent/catalyst for swift removal of methylene blue and mixed dyes

Pradhan

Parida

2012

J. Mater. Chem.

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“…In these patterns, the intense peaks at 37.30° and 43.28° corresponded to Mg and MoNi respectively. It was confirmed that Ni and Mo particles were well supported over the MgO matrix and sintering was not observed due to the presence of sharp peaks [37]. [34].…”

Section: X-ray Diffraction (Xrd)mentioning

confidence: 87%

Synthesis of Carbon Nanotubes (CNTs) from Poultry Litter for Removal of Chromium (Cr (VI)) from Wastewater

et al. 2021

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Pakistan, an agricultural country, raises 146.5 million commercial and domestic poultry birds, which generate around 544,831 tons of waste per year. This waste finds its final disposal in agricultural land as soil fertilizer or disposal site amendment. The usage of poultry litter for this purpose is uncontrolled, which results in environmental degradation such as emission of greenhouse gases, e.g., methane. However, alternative options such as thermochemical conversion of poultry litter can offer better solutions where this waste can be used as a low-cost carbon source for the synthesis of Multiwalled Carbon Nanotubes (MWCNTs). In this study, efforts were made to utilize this cheap and plentiful carbon source for the synthesis of CNTs in the presence of Ni/Mo/MgO as a catalyst, through pyrolysis. For a better yield of carbon product, the optimum ratio for the catalysts (Ni/Mo/MgO) was found to be 4:0.2:1. Furthermore, the process parameters were also optimized for better carbon yield. A good yield of CNTs resulted from a pyrolysis time of 12 min, a temperature of 825 °C, and a catalyst weight of 100 mg. The structure and morphology of the produced nanotubes were confirmed through X-ray Diffractometer (X-RD) and Scanning Electron Microscopy (SEM). The environmental application of the nanotubes was tested in a synthetic chromium solution in the lab using a batch experiment. Different experimental conditions (pH, adsorbent dosage, and contact time) were optimized to improve the adsorption of Cr (VI) by carbon nanotubes and a UV-Visible spectrophotometer was used at 540 nm to measure the absorbance of Cr (VI). The results showed that up to 81.83% of Cr (VI) removal was achieved by using 8 mg of CNTs at pH 3 with 400 rpm at 180 min of contact time. Thus, it was concluded that poultry litter can be a useful source for the synthesis of MWCNTs and thereby removal of Cr (VI) from industrial tanneries’ wastewater.

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“…Consequently, it can be deduced that the modification of MCM-41 with phosphorous produced high-performance NiMo catalysts chiefly for dibenzothiophene compounds. The analysis of the yield of the product revealed that the inclusion of phosphorus boosts the hydrogenation pathway of HDS [102]. The modified phosphorus mesoporous molecular sieves demonstrated reassuring attributes as supports for Mo-based hydrotreating catalysts ideal for the removal of refractory sulphur compounds like 4,6-DMDBT [101].…”

Section: Benefits Limitations and Effects Of Catalytic Activities Omentioning

confidence: 99%

Sustainable development and enhancement of cracking processes using metallic composites

et al. 2021

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Metallic composites represent a vital class of materials that has gained increased attention in crude oil processing as well as the production of biofuel from other sources in recent times. Several catalytic materials have been reported in the literature for catalytic cracking, particularly, of crude oil. This review seeks to provide a comprehensive overview of existing and emerging methods/technologies such as metal–organic frameworks (MOFs), metal–matrix composites (MMCs), and catalytic support materials, to bridge information gaps toward sustainable advancement in catalysis for petrochemical processes. There is an increase in industrial and environmental concern emanating from the sulphur levels of oils, hence the need to develop more efficient catalysts in the hydrotreatment (HDS and HDN) processes, and combating the challenge of catalyst poisoning and deactivation; in a bid to improving the overall quality of oils and sustainable use of catalyst. Structural improvement, high thermal stability, enhanced cracking potential, and environmental sustainability represent the various benefits accrued to the use of metallic composites as opposed to conventional catalysts employed in catalytic cracking processes.

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Synthesis, characterization and catalytic properties of NiMo/Al2O3–MCM-41 catalyst for dibenzothiophene hydrodesulfurization

Cited by 30 publications

References 13 publications

Facile synthesis of mesoporous composite Fe/Al2O3–MCM-41: an efficient adsorbent/catalyst for swift removal of methylene blue and mixed dyes

Facile synthesis of mesoporous composite Fe/Al2O3–MCM-41: an efficient adsorbent/catalyst for swift removal of methylene blue and mixed dyes

Synthesis of Carbon Nanotubes (CNTs) from Poultry Litter for Removal of Chromium (Cr (VI)) from Wastewater

Sustainable development and enhancement of cracking processes using metallic composites

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