Preparation of Fe promoted MoS2 catalysts for the hydrodeoxygenation of p-cresol as a model compound of lignin-derived bio-oil

Guo, Xuanlin; Wang, Weiyan; Wu, Kui; Huang, Yanping; Shi, Qianqian; Yang, Yong

doi:10.1016/j.biombioe.2019.04.014

Cited by 28 publications

(14 citation statements)

References 44 publications

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“…Therefore, the enhanced formation of phenols (up to ∼3-fold increase) in the Fe–Ce@Al 2 O 3 -catalyzed run was ascribed to the presence of weak acid sites (Table S1). On the other hand, the Fe and Ce active sites also contributed to the direct deoxygenation (DDO) of primary phenolic components to form aromatic hydrocarbons by facilitating the cleavage of C aromatic –OCH 3 and C aromatic –OH bonds. − For example, Park et al reported that the high oxygen storage ability of ceria (redox cycling of Ce 4+ to Ce 3+ ) promoted the adsorption of anionic oxygen in the phenolic products onto cationic cerium by a covalent bond, which played a vital role in abstracting O from phenols. Moreover, the high oxophilicity (i.e., the tendency to form oxides) of Fe also lowered the activation barrier for breaking the C–O bond of phenolics in the DDO process .…”

Section: Resultsmentioning

confidence: 99%

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Wang

Jiang

Meng

et al. 2020

Environ. Sci. Technol.

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Converting polycarbonate (PC) plastic waste into value-added chemicals and/or fuel additives by catalytic pyrolysis is a promising approach to dispose of solid wastes. In this study, a series of Fe–Ce@Al2O3 metal oxides were prepared by coprecipitation, impregnation, and a direct mixing method. The synthesized catalysts were then employed to investigate the catalytic conversion of PC wastes to produce aromatic hydrocarbons. Experimental results indicated that Fe–Ce@Al2O3 prepared by coprecipitation possessed superior catalytic activity because of its high content of weak acid sites, large pore volume, high surface area, and well dispersion of Fe and Ce active species, leading to an ∼3-fold increase in targeted monocyclic aromatic hydrocarbons compared to that achieved noncatalytically. Moreover, an increase in the catalyst to feedstock (C/F) mass ratio was beneficial to the production of aromatic hydrocarbons at the expense of phenolic products, and elevating the C/F ratio from 1:1 to 3:1 considerably increased the benzene formation as the enhancement factor was increased from 2.3 to 8.8.

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Section: Resultsmentioning

confidence: 99%

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Wang

Jiang

Meng

et al. 2020

Environ. Sci. Technol.

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“…45 The Fe 2p spectrum ( Figure S1d) for sulfided FeMo catalyst shows three doublets, which correspond to the binding energies of Fe 2+ , Fe 3+ , and satellite characteristics. 46 Two peaks with binding energies at 708.3 eV and 721.4 eV are attributed to Fe 2+ species. 46 While the peaks at 711.5 eV and 725.1 eV are referred to as Fe 3+ species.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

“…46 Two peaks with binding energies at 708.3 eV and 721.4 eV are attributed to Fe 2+ species. 46 While the peaks at 711.5 eV and 725.1 eV are referred to as Fe 3+ species. 46 These results suggest the presence of both Fe 2+ and Fe 3+ in the sulfided FeMo catalyst.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

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Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Cheah

Salam

Arora

et al. 2021

Sustainable Energy Fuels

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“…Thus Fe, Ni, and Pd metals were used along with Mo in designing a bimetallic catalyst system. Guo et al have reported HDO of p -cresol over a Fe-promoted MoS 2 catalyst with conversion and deoxygenation of 96.3 and 95.7% at 250 °C with a Fe/Mo molar ratio of 0.7:1 . Reddy Kannapu et al also reported p -cresol reduction on a Ni–Cu/Al 2 O 3 catalyst with a conversion of ∼99% to mainly 4-methyl-cyclohexanol (69 mol %) in the product .…”

Section: Introductionmentioning

confidence: 99%

Graphene-Supported Fe/Ni, β-Mo₂C Nanoparticles: Experimental and DFT Integrated Approach to Catalyst Development for Synergistic Hydrogen Production through Lignin-Rich Biomass Reforming and Reduced Shale Gas Flaring

et al. 2020

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Biomassflare gas synergistic coprocessing is a novel energy conversion technology that aims at harnessing an abundant renewable energy source: biomass and mitigate shale gas flaring. p-Cresol is used to represent lignin- and biomass-derived oxygenates for performing experimental and molecular reaction engineering of methane-assisted hydrodeoxygenation (HDO), hydrogenolysis reforming. The reaction pathway was also demonstrated on complex feedstocks like lignin and biomass, which contain a wide range of oxygenates in their composition. Novel in situ catalyst synthesis using a biomass precursor was achieved through pyrolysis to yield graphene nanosheet (GNS)-supported transition metal (TM) and Mo2C nanoparticles. Experimental work and density functional theory (DFT) modeling calculations were performed for methane-assisted p-cresol reforming using Fe, Ni, Mo2C, Fe–Mo2C, Ni–Mo2C, and Pd–Mo2C supported on GNS. Detailed mechanistic investigation of the methane–p-cresol synergistic reaction experimentally and through DFT-based molecular simulations helped ascertain the unique reaction pathway occurring on bifunctional (dual) active site-TM-doped β-Mo2C. Without TM doping, Mo2C is equally effective as Fe–Mo2C-GNS and Ni–Mo2C-GNS for CH4 dissociation and p-cresol HDO but presents a significantly higher barrier for H2 (1.7 eV vs 1.15, 1.13 eV) and CO (3.67 eV vs 2.87, 2.80 eV) gas-phase desorption. Dual active sites are required for hydrogen-rich syngas production through methane-assisted p-cresol reforming as validated by experiments, DFT calculations, and microkinetic modeling. Lignin and hardwood biomass both having a higher O/C weight ratio compared to p-cresol (0.46, 1.09 vs 0.19) were coprocessed with CH4 over Fe–Mo2C-GNS, Ni–Mo2C-GNS, and Pd–Mo2C-GNS catalysts. Fe-added Mo2C nanoparticles dispersed in the graphene support were found to be highly active for simultaneous CH4 activation and extensive HDO of p-cresol, lignin, and hardwood biomass. Higher HDO conversion and H2/CO ratios were obtained from CH4-assisted lignin/biomass reforming over Fe–Mo2C-GNS. Up to 99% hydrogen present in lignin could be valorized as syngas with a concentration of >65%.

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Preparation of Fe promoted MoS2 catalysts for the hydrodeoxygenation of p-cresol as a model compound of lignin-derived bio-oil

Cited by 28 publications

References 44 publications

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Graphene-Supported Fe/Ni, β-Mo₂C Nanoparticles: Experimental and DFT Integrated Approach to Catalyst Development for Synergistic Hydrogen Production through Lignin-Rich Biomass Reforming and Reduced Shale Gas Flaring

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Preparation of Fe promoted MoS2 catalysts for the hydrodeoxygenation of p-cresol as a model compound of lignin-derived bio-oil

Cited by 28 publications

References 44 publications

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Promoting Aromatic Hydrocarbon Formation via Catalytic Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum Oxide Catalysts

Role of transition metals on MoS2-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Graphene-Supported Fe/Ni, β-Mo2C Nanoparticles: Experimental and DFT Integrated Approach to Catalyst Development for Synergistic Hydrogen Production through Lignin-Rich Biomass Reforming and Reduced Shale Gas Flaring

Contact Info

Product

Resources

About

Role of transition metals on MoS₂-based supported catalysts for hydrodeoxygenation (HDO) of propylguaiacol

Graphene-Supported Fe/Ni, β-Mo₂C Nanoparticles: Experimental and DFT Integrated Approach to Catalyst Development for Synergistic Hydrogen Production through Lignin-Rich Biomass Reforming and Reduced Shale Gas Flaring