Efficient bimetallic NiCu-SiO2 catalysts for selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol

Liu, Hailong; Huang, Zhiwei; Kang, Haixiao; Li, Xuemei; Xia, Chungu; Chen, Jing; Liu, Haichao

doi:10.1016/j.apcatb.2017.08.022

Cited by 81 publications

(52 citation statements)

References 71 publications

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“…The presence of other phases in the diffraction patterns were not confirmed by the X-ray diffraction technique. Hailong Liu et al [31] investigated the phase composition of reduced monometallic 90Cu-SiO 2 and bimetallic 10Ni80Cu-SiO 2 catalysts before reaction and after 5 cycles in xylitol hydrogenolysis. The XRD patterns recorded for the investigated catalysts demonstrated characteristic diffraction peaks attributed to Cu 0 and Cu-Ni alloy and lack of formation the separate diffraction peak assigned to Ni 0 phase.…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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In this work, bimetallic Cu-Ni catalysts supported on binary oxides containing ZnO, ZrO 2 , CeO 2 and Al 2 O 3 were investigated in hydrogen production via the oxidative steam reforming of methanol (OSRM). Their physicochemical properties were extensively studied using various methods such as BET, TPR-H 2 , TPD-NH 3 , XRD, SEM-EDS, ToF-SIMS and XPS. The reactivity measurements showed that the active phase and support composition played an important role in the activity of the catalyst in the OSRM. The most active system at higher temperatures was 30% Cu-10% Ni/CeO 2 ·Al 2 O 3 , with high catalytic activity attributed to the Cu 0.8 Ni 0.2 alloy formation. In addition, the reactivity results showed that the most active catalyst exhibited high acidity and was easily reduced. At low temperatures, the best catalytic properties were exhibited by 30% Cu-10% Ni/ZrO 2 ·Al 2 O 3 . The reactivity and physicochemical properties of the studied catalysts confirmed the crucial role of alloy composition on their catalytic properties in the oxy-steam reforming of methanol. The obtained results validate the possibility of using Cu-Ni catalysts for hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

et al. 2020

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“…It is known that xylitol and sorbitol can be derived from facile hydrogenation of xylose and glucose, respectively, over solid metal catalysts. Further hydrogenolysis of xylitol and sorbitol to glycols often requires elevated temperature and pressure ( T >220 °C, 5 MPa H 2 ) ,,,. Rational control of the catalyst activity and product distribution still remains a great challenge in this area.…”

Section: Case Study A: Polyol Conversionmentioning

confidence: 99%

Catalytic Transfer Hydrogenation of Biomass‐Derived Substrates to Value‐Added Chemicals on Dual‐Function Catalysts: Opportunities and Challenges

et al. 2018

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Aqueous‐phase hydrodeoxygenation (APH) of bioderived feedstocks into useful chemical building blocks is one the most important processes for biomass conversion. However, several technological challenges, such as elevated reaction temperature (220–280 °C), high H2 pressure (4–10 MPa), uncontrollable side reactions, and intensive capital investment, have resulted in a bottleneck for the further development of existing APH processes. Catalytic transfer hydrogenation (CTH) under much milder conditions with non‐fossil‐based H2 has attracted extensive interest as a result of several advantageous features, including high atom efficiency (≈100 %), low energy intensity, and green H2 obtained from renewable sources. Typically, CTH can be categorized as internal H2 transfer (sacrificing small amounts of feedstocks for H2 generation) and external H2 transfer from H2 donors (e.g., alcohols, formic acid). Although the last decade has witnessed a few successful applications of conventional APH technologies, CTH is still relatively new for biomass conversion. Very limited attempts have been made in both academia and industry. Understanding the fundamentals for precise control of catalyst structures is key for tunable dual functionality to combine simultaneous H2 generation and hydrogenation. Therefore, this Review focuses on the rational design of dual‐functionalized catalysts for synchronous H2 generation and hydrogenation of bio‐feedstocks into value‐added chemicals through CTH technologies. Most recent studies, published from 2015 to 2018, on the transformation of selected model compounds, including glycerol, xylitol, sorbitol, levulinic acid, hydroxymethylfurfural, furfural, cresol, phenol, and guaiacol, are critically reviewed herein. The relationship between the nanostructures of heterogeneous catalysts and the catalytic activity and selectivity for C−O, C−H, C−C, and O−H bond cleavage are discussed to provide insights into future designs for the atom‐economical conversion of biomass into fuels and chemicals.

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“…22,23 In previous studies, it has been shown that adding a second metal such as Zn, Ni, B, In, Ag, Mn, or Mg to the Cu/SiO 2 catalyst could improve the catalytic activity. 17,[24][25][26][27][28][29] The promotion is attributed to the enhancement in copper species dispersion and the appropriate Cu + /(Cu + + Cu 0 ) ratio on the surface of the catalyst. However, there are still many challenges in Cu-based catalysts that need to be overcome, especially their short lifespan.…”

Section: Introductionmentioning

confidence: 99%

Highly active Ce, Y, La-modified Cu/SiO₂ catalysts for hydrogenation of methyl acetate to ethanol

Ren

Younis

et al. 2020

RSC Adv.

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Efficient bimetallic NiCu-SiO2 catalysts for selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol

Cited by 81 publications

References 71 publications

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Catalytic Transfer Hydrogenation of Biomass‐Derived Substrates to Value‐Added Chemicals on Dual‐Function Catalysts: Opportunities and Challenges

Highly active Ce, Y, La-modified Cu/SiO₂ catalysts for hydrogenation of methyl acetate to ethanol

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Efficient bimetallic NiCu-SiO2 catalysts for selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol

Cited by 81 publications

References 71 publications

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Hydrogen Production on Cu-Ni Catalysts via the Oxy-Steam Reforming of Methanol

Catalytic Transfer Hydrogenation of Biomass‐Derived Substrates to Value‐Added Chemicals on Dual‐Function Catalysts: Opportunities and Challenges

Highly active Ce, Y, La-modified Cu/SiO2 catalysts for hydrogenation of methyl acetate to ethanol

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Highly active Ce, Y, La-modified Cu/SiO₂ catalysts for hydrogenation of methyl acetate to ethanol