A durable Ni/La-Y catalyst for efficient hydrogenation of γ-valerolactone into pentanoic biofuels

Jiang, He; Lin, Lu; Li, Meng; Miao, Caixia; Wu, Zhijie; Chen, Rui; Chen, Shaohua; Chen, Tiehong; Su, Yang; Zhang, Tao; Luo, Wenhao

doi:10.1016/j.jechem.2022.02.011

Cited by 21 publications

(10 citation statements)

References 54 publications

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“…To be noted, when compared with Ni-containing samples, Cu 2+ over the Cu/Al 2 O 3 is relatively difficult to reduce to Cu + /Cu 0 , indicating Cu species loaded on Al 2 O 3 are more stable, which is in accordance with our previous results. In terms of Ni species (Figure 7b,d), the reduction of Ni 2+ (855.6 eV) to Ni 0 (852.69 eV) is clearly observed in all catalysts (Figure 7d), but for the Cu/NiO, a new peak positioned at 854.2 eV appeared over the fresh catalyst (Figure 7c), which is assigned to the presence of Ni + [53]. Hence, the Cu/NiO has stronger reducibility compared to Cu/Ni 3 AlO x and Cu/Ni 1 AlO x , which might lead to its poor stability during catalysis.…”

Section: Insight Into the Catalytic Performance And Stabilitymentioning

confidence: 96%

Highly Selective and Stable Cu Catalysts Based on Ni–Al Catalytic Systems for Bioethanol Upgrading to n-Butanol

Yan

Zhan

et al. 2023

Molecules

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The catalytic upgrading of ethanol into butanol through the Guerbet coupling reaction has received increasing attention recently due to the sufficient supply of bioethanol and the versatile applications of butanol. In this work, four different supported Cu catalysts, i.e., Cu/Al2O3, Cu/NiO, Cu/Ni3AlOx, and Cu/Ni1AlOx (Ni2+/Al3+ molar ratios of 3 and 1), were applied to investigate the catalytic performances for ethanol conversion. From the results, Ni-containing catalysts exhibit better reactivity; Al-containing catalysts exhibit better stability; but in terms of ethanol conversion, butanol selectivity, and catalyst stability, a corporative effect between Ni–Al catalytic systems can be clearly observed. Combined characterizations such as XRD, TEM, XPS, H2-TPR, and CO2/NH3-TPD were applied to analyze the properties of different catalysts. Based on the results, Cu species provide the active sites for ethanol dehydrogenation/hydrogenation, and the support derived from Ni–Al–LDH supplies appropriate acid–base sites for the aldol condensation, contributing to the high butanol selectivity. In addition, catalysts with strong reducibility (i.e., Cu/NiO) may be easily deconstructed during catalysis, leading to fast deactivation of the catalysts in the Guerbet coupling process.

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Section: Insight Into the Catalytic Performance And Stabilitymentioning

confidence: 96%

Highly Selective and Stable Cu Catalysts Based on Ni–Al Catalytic Systems for Bioethanol Upgrading to n-Butanol

Yan

Zhan

et al. 2023

Molecules

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“…Enhancing the catalyst stability of zeolite-based bifunctional catalysts in the transformation of biomass-derived platform compounds requires further exploration. Against this background, Luo et al developed a Ni/La−Y catalyst for the continuous hydrogenation of γ-valerolactone into ethyl pentanoate, 142 which can afford 90% γ-valerolactone conversion and 100% selectivity to ester valerate for 1000 h under the reaction conditions of 200 °C, 3.0 MPa H 2 , 50 wt % γvalerolactone in EtOH with a WHSV of 5 h −1 . In contrast, a gradual drop in γ-valerolactone conversion was observed at 40 h upon the Ni/H−Y catalyst without modification of La.…”

Section: Synergistic Catalysis Of Metallic and Brønsted Acid Sitesmentioning

confidence: 99%

Synergistic Catalysis for Promoting Ring-Opening Hydrogenation of Biomass-Derived Cyclic Oxygenates

et al. 2023

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Biomass has attracted great attention as a carbon source for the production of valuable chemicals and fuels. Selective ring-opening hydrogenation of cyclic oxygenates derived from biomass offers promising approaches for catalytic synthesis of value-added oxygen-containing compounds compared to corresponding fossil-based protocols. Different catalytic sites are required to perform distinct types of elementary reaction steps (e.g., adsorption and activation of oxygen-containing groups, association of a hydrogen molecule), and thus the synergistic effect of these sites plays a critical role in the selective hydrogenation transformation, which has attracted increasing attention in recent years. Here, we present a review of the ring-opening hydrogenation of the representative platforms of furfural, 5-hydroxymethylfurfural, γ-valerolactone, triacetic acid lactone, and their derivatives catalyzed by various homogeneous and heterogeneous catalysts. The particular focus is placed on the synergistic effect of the active sites, including Brønsted acid, Lewis acid, base, and metallic sites, on the selective scission of two different cyclic C–O bonds and related hydrogenation transformation. The reaction mechanism is also discussed to provide insights for guiding the design of multifunctional catalysts for biomass valorization. Finally, the current challenges and future opportunities in the synergistic catalytic ring-opening transformation of biomass-derived cyclic compounds are also analyzed.

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“…The Al VI resonance at around 0 ppm represents the octahedral EFAl species. 20,28,30,31 The relative amounts of different aluminum species in Ru/USY catalysts are further quantified and are shown in Fig. 4b.…”

Section: Dalton Transactions Communicationmentioning

confidence: 99%

“…In particular, zeolite-confined metal-acid intimacy could afford improved performance in the efficient coupling of HDO processes in biomass valorization. [15][16][17][18][19][20][21][22][23][24][25] To alleviate the severity of the reaction medium for catalysts, alkyl levulinate, instead of LA, has been used as the benign substrate, which can be applied with a high substrate concentration up to a neat substrate for the efficient production of pentanoic biofuels. 26,27 Still, the optimal ratio balance between metal and acid functions with the zeolite-confined metal-acid intimacy is rarely reported for the efficient HDO of LA or alkyl levulinate into PA/PEs.…”

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confidence: 99%

Efficient hydrodeoxygenation of methyl levulinate into pentanoic biofuels over Ru/USY catalysts

et al. 2023

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A durable Ni/La-Y catalyst for efficient hydrogenation of γ-valerolactone into pentanoic biofuels

Cited by 21 publications

References 54 publications

Highly Selective and Stable Cu Catalysts Based on Ni–Al Catalytic Systems for Bioethanol Upgrading to n-Butanol

Highly Selective and Stable Cu Catalysts Based on Ni–Al Catalytic Systems for Bioethanol Upgrading to n-Butanol

Synergistic Catalysis for Promoting Ring-Opening Hydrogenation of Biomass-Derived Cyclic Oxygenates

Efficient hydrodeoxygenation of methyl levulinate into pentanoic biofuels over Ru/USY catalysts

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