Mesostructured CMK-3 carbon supported Ni–ZrO2 as catalysts for the hydrodeoxygenation of guaiacol

López, M.; Palacio, Rubén; Royer, Sébastien; Mamede, Anne-Sophie; Fernández, Jhon J.

doi:10.1016/j.micromeso.2019.109694

Cited by 26 publications

(11 citation statements)

References 68 publications

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“…Compared with the Co 2.5 /rGO catalyst, the Co 2.5 /Al 2 O 3 and Co 2.5 /HY samples (Table 2, entries 4 and 5) show much lower activities. In general, a pristine metal species is an active component in the hydrogenation reaction; thus, the catalysts are prereduced or originally contain metals before they are used in GUA hydrogenation [13][14][15][16][17][18][19][20][21][22][23][24][25][26]. In this study, all the catalysts were used without prereduction treatments.…”

Section: Catalyst Screening Studymentioning

confidence: 99%

“…On the other hand, some studies have focused on the development of low-cost transition metal catalysts. Some Ni-based catalysts [18][19][20][21][22][23][24][25] and Co-based catalysts [26][27][28] catalyzed HDO of GUA with CYHAOL as the main product. In particular, the production of CYHAOL in more than 90% yield was achieved over several Co-containing catalysts, including Ru-Co supported on active carbon [16], Ni-Co supported carbon nanotubes [25], and Co supported on TiO 2 [27].…”

Section: Introductionmentioning

confidence: 99%

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Cobalt–Graphene Catalyst for Selective Hydrodeoxygenation of Guaiacol to Cyclohexanol

Guo

Mao

et al. 2022

Nanomaterials

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Herein, cobalt-reduced graphene oxide (rGO) catalyst was synthesized with a practical impregnation–calcination approach for the selective hydrodeoxygenation (HDO) of guaiacol to cyclohexanol. The synthesized Co/rGO was characterized by transmission electron microscopy (TEM), high-angle annular dark-field scanning TEM (HAADF-STEM), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, X-ray diffraction (XRD), and H2 temperature-programmed reduction (H2-TPR) analysis. According to the comprehensive characterization results, the catalyst contains single Co atoms in the graphene matrix and Co oxide nanoparticles (CoOx) on the graphene surface. The isolated Co atoms embedded in the rGO matrix form stable metal carbides (CoCx), which constitute catalytically active sites for hydrogenation. The rGO material with proper amounts of N heteroatoms and lattice defects becomes a suitable graphene material for fabricating the catalyst. The Co/rGO catalyst without prereduction treatment leads to the complete conversion of guaiacol with 93.2% selectivity to cyclohexanol under mild conditions. The remarkable HDO capability of the Co/rGO catalyst is attributed to the unique metal–acid synergy between the CoCx sites and the acid sites of the CoOx nanoparticles. The CoCx sites provide H while the acid sites of CoOx nanoparticles bind the C-O group of reactants to the surface, allowing easier C-O scission. The reaction pathways were characterized based on the observed reaction–product distributions. The effects of the process parameters on catalyst preparation and the HDO reaction, as well as the reusability of the catalyst, were systematically investigated.

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Section: Catalyst Screening Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cobalt–Graphene Catalyst for Selective Hydrodeoxygenation of Guaiacol to Cyclohexanol

Guo

Mao

et al. 2022

Nanomaterials

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“…Micropores such as AC with larger surface area and smaller pore size (<2 nm) usually cause limitation of distribution of metal active phases [61] . Carbon with mesopores (2–50 nm) is suitable as support due to better particle distribution than micropores (Figure 4a) [25c] (Table 2, entry 1). Ni NPs with good dispersion were also formed on surface of mesoporous CAG due to tunable combination of mesopore with high surface area (Figure 4b) [41] .…”

Section: Surface Microstructure Of Carbon Materialsmentioning

confidence: 99%

Progress in Effects of Microenvironment of Carbon‐based Catalysts on Hydrodeoxygenation of Biomass

2020

ChemCatChem

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Carbon‐based catalysts have made significant progress in hydrodeoxygenation (HDO) of biomass. Since the HDO reaction usually carried on surface of catalyst, the interaction of reactant with catalyst is closely related to the surface microenvironment of catalyst, which may further have an impact on catalytic performance. This review will discuss the relationship between surface microenvironment of carbon support and catalytic performance and mechanism of HDO reaction during biomass upgrading. We will focus on the microenvironment effect associated with HDO reaction in carbon‐based catalysts including effects of surface microstructure and surface functionalization of carbon supports on preparation of heterogeneous catalysts and catalytic performance, respectively. Study of microenvironment may provide guidance for further development of efficient carbon‐based catalysts in biomass resource utilization.

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“…Hydrodeoxygenation of lignin-derived phenolics such as guaiacol as renewable raw material to produce cyclohexanol have gained increasing research attention in recent years, e.g. ruthenium on alumina, 28 nanoporous nickel, 29 Pd/Fe, 30 Ni-ZrO 2 on CMK-3 carbon, 31 electrocatalytically, 32 etc.…”

Section: Introductionmentioning

confidence: 99%

Greenhouse gas emissions reduction by process intensification: Reactive distillation column with side decanter

Popescu

Bonet

Llorens

2020

Energy & Environment

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Direct hydration of cyclohexene to produce cyclohexanol is the industrial process with a lower raw material cost but with a quite expensive process. Large energy consumption is consequence of large cyclohexene recycle related with its unfavourable chemical equilibrium. This study corroborates that the Asahi process is a good candidate for intensification avoiding the cyclohexene recycle. Rigorous simulation shows that a single reactive distillation column, with a side decanter, operated at total reflux, allows overcoming the chemical equilibrium limitations as the product is continuously collected by the column bottoms and the heat of reaction is directly used to separate the product by distillation. The novel process is studied and compared to the classical Asahi process. An energy comparison with the available processes proposed in the literature is performed. Therefore, achieving more energy-efficient processes leads to lowering their environmental impact, thus decreasing the carbon dioxide emissions. Applying the proposed methodology for cyclohexanol production, more than 67,000 t CO2/y emissions can be avoided compared to the nowadays used classical process, thus the potential savings applying process intensification to the chemical industry are very large and worth further investigation.

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Mesostructured CMK-3 carbon supported Ni–ZrO2 as catalysts for the hydrodeoxygenation of guaiacol

Cited by 26 publications

References 68 publications

Cobalt–Graphene Catalyst for Selective Hydrodeoxygenation of Guaiacol to Cyclohexanol

Cobalt–Graphene Catalyst for Selective Hydrodeoxygenation of Guaiacol to Cyclohexanol

Progress in Effects of Microenvironment of Carbon‐based Catalysts on Hydrodeoxygenation of Biomass

Greenhouse gas emissions reduction by process intensification: Reactive distillation column with side decanter

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