Hydrodeoxygenation of m-cresol over Pd/Al-SBA-15 catalysts: Effect of Al content on the deoxygenation reaction pathways

Teles, Camila A.; Ciotonea, Carmen; Gomes, Nicolas.; Gonçalves, Vinicius Ottonio O.; Ungureanu, Adrian; Catrinescu, Cezar; Marinova, Maya; Clacens, Jean‐Marc; Royer, Sébastien; Noronha, Fábio B.; Richard, Frédéric

doi:10.1016/j.apcata.2022.118686

Cited by 18 publications

(22 citation statements)

References 62 publications

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“…Pd metallic particles on that carrier did not show a uniform size (Figure 3a,b). Similarly to that recently reported by Teles et al 56 who studied Pd (2 wt %) supported on Almodified SBA-15, the corresponding distribution comprised small particles in the ordered silica channels, whereas bigger ones were deposited on the surface external to the porous network. The stark contrast between supported NM particles and the corresponding carrier (due to significantly different atomic number, HAADF) facilitated measuring deposited crystallites' dimensions.…”

Section: Scanning Transmission Electron Microscopy (Stem)supporting

confidence: 77%

“…53 Indeed, the low reduction temperature for supported Pd precursor observed on Figure 2a corroborated that fact. 53 The point of zero charge (PZC) of SBA-15 has been reported around pH ∼3.2 35 and 3.9, 56 whereas Si-rich (SiO 2 /Al 2 O 3 = 50, 75, 100) Al-modified solids show no PZC, the surface of all these solids being negatively charged at any pH. 35 However, using sodium aluminate as an Al source in the last case could probably have played a determining role in that behavior.…”

Section: Scanning Transmission Electron Microscopy (Stem)mentioning

confidence: 99%

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Thioresistant PdPt/Al/SBA-15 for Naphthalene Hydrogenation

Escobar,

Colín-Luna,

Barrera

2024

Ind. Eng. Chem. Res.

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Al-modified (chemical grafting) SBA-15 (SiO 2 / Al 2 O 3 = 5 mass ratio) materials were used as noble metal (NM, monometallic Pt or Pd and bimetallic Pd/Pt = 4, 0.5 wt % loading) carriers. The materials were studied by XRF, N 2 physisorption, XRD, TPR, pyridine thermodesorption FTIR, and STEM (HAADF). Hydrogenating properties were tested in naphthalene (N) conversion; meanwhile, dibenzothiophene (80 ppm) was added in some experiments to evaluate the thioresistance of prepared catalysts. Al-incorporation provided enhanced Lewis and Brønsted acidity to pristine SBA-15 due to alumina-like domains that contributed to Pt dispersion reflected in augmented hydrogenation. The Pt-based catalyst was the most active in N saturation (T = 290 °C, P = 6.97 MPa), whereas the Pd/Pt (4/1) formulation had enhanced thioresistance probably due to NM alloying (electron transfer in Pt-Pd core−shell particles) in conjunction with weak Brønsted acidity (Si−O−Al bonds, electron transfer from NM) that provided additional sites for aromatic adsorption. Enhanced thioresistance is crucial for aromatic saturation of NM catalysts aimed at second-stage polishing of ultralow S diesel.

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Section: Scanning Transmission Electron Microscopy (Stem)supporting

confidence: 77%

Section: Scanning Transmission Electron Microscopy (Stem)mentioning

confidence: 99%

Thioresistant PdPt/Al/SBA-15 for Naphthalene Hydrogenation

Escobar,

Colín-Luna,

Barrera

2024

Ind. Eng. Chem. Res.

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“…According to reports, the catalytic materials with metal particles with higher oxidation states (II and IV) contribute to the suppression of coke formation, which has been verified when using Ru/Al 2 O 3 catalysts . Besides, it is interesting to note that the stability and durability of the catalysts can also be well improved using Al-rich or layered porous zeolites and alkali metal dopants. , …”

Section: Potential Catalysts and Conditions Of The Conversion Of Phen...mentioning

confidence: 87%

“…234 Besides, it is interesting to note that the stability and durability of the catalysts can also be well improved using Al-rich or layered porous zeolites and alkali metal dopants. 41,235 Lastly, although there is extensive research into the preparation of arenes, most of the current achievements still focus on the use of phenolic compounds or analogue mixtures as the initial feedstocks, while the application of the selective catalysts discussed to actual bio-oil or raw lignin is still quite limited. Presently, the sequential depolymerization−hydrodeoxygenation route is often adopted to obtain arenes from renewable lignin.…”

Section: Conversion Of Phenolics To Arenesmentioning

confidence: 99%

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

Lang

2022

ACS Sustainable Chem. Eng.

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Arenes are an important class of intermediates in the chemical industry that have been widely applied in pharmaceuticals, fuels, synthetic resins, and so on. Given the growing demand for arenes and the unsustainability of petroleum-based production pathways, hydrodeoxygenation (HDO) of lignin-derived phenolic compounds presents a promising strategy for translating lignin materials into value-added arenes. Whereas most HDO catalysts perform low selectivity in arenes due to the presence of competing processes that more readily saturate the aromatic rings, in this Perspective, we first focus on the latest advances in the sustainable production of arenes from the HDO of phenolic compounds. Furthermore, the newest achievements of different types of catalysts and their reaction mechanisms involved in the HDO processes are systematically classified and summarized. Lastly, the existing challenges, tentative suggestions for improvement, and future opportunities within this attractive field are given with the aim of providing new research ideas and stimulating inspiration for a wide range of scientists to drive toward a sustainable and carbon-neutral society where biomass resources play a major role in fuels and chemicals.

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“…Catalysts based on noble metals such as Pt, Pd, Rh, and Ru supported on different materials have been investigated in HDO of different model compounds, obtaining high yields of hydrocarbons. − Nickel-based catalysts are an alternative to noble metals, primarily due to their lower cost and high activity. ,, On the other hand, different kinds of ordered mesoporous materials, such as MCM-41, SBA-15, SBA-16, KIT-6, and others, have garnered significant attention as supports for heterogeneous catalysts. − In the field of HDO of bio-oil model compounds, the use of different Ni catalysts supported on SBA-15-type materials has been reported in the literature. For instance, hydrotreating of a mixture of methyl esters was conducted over Ni and Co catalysts supported on SBA-15 and Al-SBA-15 .…”

Section: Introductionmentioning

confidence: 99%

Boosting the Hydrodeoxygenation Activity and Selectivity of Ni/(M)-SBA-15 Catalysts by Chemical Alteration of the Support

Calzada,

Pérez-Estrada,

Sánchez-Ramírez

et al. 2023

ACS Omega

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The influence of the acid sites in the hydrodeoxygenation of anisole performed over Ni catalysts supported on SBA-15 modified with metal oxides (Ni/M-SBA-15, M = Ti, Zr, Al, or Nb) was demonstrated. Catalysts were characterized by SEM–EDX, nitrogen physisorption, XRD, UV–visible DRS, TPR, TPD of ammonia, IR-Py, O2 chemisorption, and high-resolution transmission electron microscopy. The mesoporous structure and the hexagonal arrangement of the supports were maintained in the catalysts. Ni catalysts supported on modified M-SBA-15 exhibited a higher metal-support interaction, an increase in the acidity and, as a consequence, improved selectivity to cyclohexane. The deoxygenation reaction rate constants increased as Ni/SBA-15 < Ni/Ti-SBA-15 < Ni/Nb-SBA-15 < Ni/Zr-SBA-15 < Ni/Al-SBA-15, which is attributed to the increase in the amount and strength of acid sites, especially of the Brønsted ones, which promotes the cleavage of the C–O bond. It is also important to keep the metal/acid sites together to obtain high activity and selectivity to hydrodeoxygenated products.

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Hydrodeoxygenation of m-cresol over Pd/Al-SBA-15 catalysts: Effect of Al content on the deoxygenation reaction pathways

Cited by 18 publications

References 62 publications

Thioresistant PdPt/Al/SBA-15 for Naphthalene Hydrogenation

Thioresistant PdPt/Al/SBA-15 for Naphthalene Hydrogenation

Toward Value-Added Arenes from Lignin-Derived Phenolic Compounds via Catalytic Hydrodeoxygenation

Boosting the Hydrodeoxygenation Activity and Selectivity of Ni/(M)-SBA-15 Catalysts by Chemical Alteration of the Support

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