Effects of pH and vanadium concentration during the impregnation of Na-SiO2 supported catalysts for the oxidation of propane

Hernández-Maya, Mery S.; Espinosa-Lobo, Carol B.; Cabanzo-Hernández, Rafael; Mejía-Ospino, Enrique; Medrano, Víctor Gabriel Baldovino

doi:10.1016/j.mcat.2022.112158

Cited by 7 publications

(11 citation statements)

References 122 publications

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“…The CasaXPS software (Casa Software Ltd) was used to process the data using a Shirley-type baseline. 38 All spectra were calibrated with the C 1s at 284.8 eV. The signals correspond to C1 284.8 eV (C–H), C2 286.7 eV (O–C–C–C), C3 288.0 eV (O–C–O/C O) and C4 289 eV (O C–O–).…”

Section: Methodsmentioning

confidence: 99%

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Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Martínez-Ramírez,

Rincón-Ortiz,

Baldovino-Medrano

et al. 2023

RSC Adv.

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Section: Methodsmentioning

confidence: 99%

“…The CasaXPS soware (Casa Soware Ltd) was used to process the data using a Shirley-type baseline. 38 All spectra were calibrated with the C 1s at 284. [39][40][41] Atomic oxygen (%) was determined aer eliminating the contributions of silicon and calcium oxides.…”

Section: Materials Characterizationmentioning

confidence: 99%

Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Martínez-Ramírez,

Rincón-Ortiz,

Baldovino-Medrano

et al. 2023

RSC Adv.

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“…Therefore, it was assumed that nickel particles were homogeneously dispersed over the SiO2, -Al2O3, and H + -Y zeolite supports. A metric that supports this assumption is 𝑁𝑆𝑆𝐴 𝐵𝐸𝑇 , [77][78][79] Equation 2, whose values are shown in the last column in Table 1. Indeed, all 𝑁𝑆𝑆𝐴 𝐵𝐸𝑇 values for these catalysts were higher or equal to 0.95.…”

Section: Specific Surface Area and Porositymentioning

confidence: 96%

Catalytic performance of supported Ni in the hydrodesulfurization of dibenzothiophene

Valderrama-Zapata,

García-Sánchez,

Vargas-Montañez

et al. 2023

Preprint

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To reduce pollution, sulfur, nitrogen, and other heteroatoms are removed from fuels by hydrotreatment (HDT). Conventional HDT catalysts are based on Ni-MoS2 phases dispersed over -Al2O3. Despite the myriad of papers studying these catalysts, it is somehow surprising to learn that the role of Ni in these catalysts is not yet fully understood. Most literature considers that Ni is either converted to some form of catalytically inactive nickel sulfide or that it mixes with MoS2 to act as a strong catalytic promoter. In this work, we focused on analyzing whether well-dispersed supported nickel nanoparticles can be active in the hydrodesulfurization of dibenzothiophene; one of the most refractory molecules composing diesel and marine fuels. We dispersed nickel using the principles of the strong electrostatic adsorption (SEA) method over silica (~neutral acidity), Al2O3 (Lewis acidity), H+-Y zeolite (Brönsted-Lewis acidity), and microporous-mesoporous H+-Y zeolite (similar Brönsted-Lewis acidity than its microporous counterpart). The results showed that Ni nanoparticles are catalytically active in the hydrodesulfurization of DBT and that zeolites provide them with long-term stability. In addition, using SEA impregnation and providing mesoporosity to the zeolite improved the catalytic performance. Overall, we demonstrate that Ni nanoparticles may behave in the same manner as noble metals such as Pt, Pd, and Ir behave in hydrodesulfurization. We discuss some of the probable reasons for such behavior and remark on the role of Ni in hydrotreatment.

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“…catalysts have demonstrated remarkable catalytic activity. [9][10][11][12] In addition, previous research has shown that a high dispersion of active species is beneficial for the production of ethylene, propylene, and oxygenates. [13][14][15] Meanwhile, V/SiO 2 has proven to be a promising catalyst for the selective oxidation of ethane or propane, maximizing the dispersion of the components and further promoting the activity and stability of the conversion of ethane or propane.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, vanadium‐based (NaVO x /SiO 2 , V/BN‐T, MoVNbO multi‐metal oxide, WVO/Al 2 O 3 catalyst, etc.) catalysts have demonstrated remarkable catalytic activity [9–12] . In addition, previous research has shown that a high dispersion of active species is beneficial for the production of ethylene, propylene, and oxygenates [13–15] .…”

Section: Introductionmentioning

confidence: 99%

One‐pot synthesis of V doped mesoporous SiO₂ catalysts for selective oxidation of ethane and propane

Song

Fan

et al. 2023

ChemistrySelect

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A series of vanadium‐doped mesoporous SiO2 catalysts were prepared using a one‐pot emulsion method. The effects of VOx species with different structures on C−H bond activation and product selectivity in ethane and propane selective oxidation were investigated using X‐ray diffraction (XRD), N2 adsorption‐desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman, ultraviolet‐visible diffuse reflectance spectroscopy (UV‐Vis DRS), hydrogen temperature programmed reduction (H2‐TPR), and ammonia temperature programmed desorption (NH3‐TPD) characterizations. The results revealed that the highly dispersed isolated tetrahedral VOx species on the catalyst gradually polymerized into highly dispersed oligomeric VOx species with the increased V loading. The former is beneficial for the formation of olefins and total aldehydes during the selective oxidation of propane. Oligomeric VOx species are conducive to improving the selectivity of ethylene and acetaldehyde in the selective oxidation of ethane. The highest catalytic performances for selective oxidation of ethane and propane were obtained at a temperature of 650 °C. The conversion of ethane was 41.6 %, with a corresponding yield of ethylene and acetaldehyde of 23.6 % over a 0.5 V−SiO2 catalyst. In contrast, the propane conversion was 61.5 %, with a corresponding total yield of olefins and aldehydes of 41.3 % over a 1.0 V−SiO2 catalyst.

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Effects of pH and vanadium concentration during the impregnation of Na-SiO2 supported catalysts for the oxidation of propane

Cited by 7 publications

References 122 publications

Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Catalytic performance of supported Ni in the hydrodesulfurization of dibenzothiophene

One‐pot synthesis of V doped mesoporous SiO₂ catalysts for selective oxidation of ethane and propane

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Effects of pH and vanadium concentration during the impregnation of Na-SiO2 supported catalysts for the oxidation of propane

Cited by 7 publications

References 122 publications

Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Influence of reaction variables on the surface chemistry of cellulose nanofibers derived from palm oil empty fruit bunches

Catalytic performance of supported Ni in the hydrodesulfurization of dibenzothiophene

One‐pot synthesis of V doped mesoporous SiO2 catalysts for selective oxidation of ethane and propane

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Product

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One‐pot synthesis of V doped mesoporous SiO₂ catalysts for selective oxidation of ethane and propane