Catalytic conversion of lignin in woody biomass into phenolic monomers in methanol/water mixtures without external hydrogen

Xianhong Ouyang, Xiaoming Huang (Corresponding author), Jiadong Zhu, Michael Boot, Emiel Hensen (Corresponding author)

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The valorization of lignin in renewable lignocellulosic biomass is an important target in the transition to a more sustainable production of fuels and chemicals. We present here a modification of the “lignin-first” approach that does not hinge on the use of external hydrogen. Instead, we use methanol/water mixtures as a suitable solvent that can be partly reformed into hydrogen. We propose a one-step process in which in planta lignin (wood sawdust) is converted to phenolic monomers over a Pt-based catalyst in an inert atmosphere. The role of the methanol/water mixture is not only to supply hydrogen but also to extract lignin fragments from the biomass matrix. Pt catalyzes methanol reforming to obtain hydrogen and the stabilization of reactive lignin intermediates by hydrogenation of reactive bonds. The latter aspect is crucial to avoid unfavorable condensation of fragments. Under optimized conditions, a yield of phenolic monomers of nearly 50% can be obtained from birch wood at a temperature of 230 °C in 3 h.
TaalEngels
Pagina's13764-13773
TijdschriftACS Sustainable Chemistry & Engineering
DOI's
StatusGepubliceerd - 23 jul 2019

Vingerafdruk

Lignin
lignin
Methanol
methanol
Hydrogen
Biomass
Monomers
hydrogen
Water
biomass
Wood
water
Sawdust
Hinges
Reforming reactions
Hydrogenation
condensation
Condensation
stabilization
Stabilization

Trefwoorden

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    title = "Catalytic conversion of lignin in woody biomass into phenolic monomers in methanol/water mixtures without external hydrogen",
    abstract = "The valorization of lignin in renewable lignocellulosic biomass is an important target in the transition to a more sustainable production of fuels and chemicals. We present here a modification of the “lignin-first” approach that does not hinge on the use of external hydrogen. Instead, we use methanol/water mixtures as a suitable solvent that can be partly reformed into hydrogen. We propose a one-step process in which in planta lignin (wood sawdust) is converted to phenolic monomers over a Pt-based catalyst in an inert atmosphere. The role of the methanol/water mixture is not only to supply hydrogen but also to extract lignin fragments from the biomass matrix. Pt catalyzes methanol reforming to obtain hydrogen and the stabilization of reactive lignin intermediates by hydrogenation of reactive bonds. The latter aspect is crucial to avoid unfavorable condensation of fragments. Under optimized conditions, a yield of phenolic monomers of nearly 50{\%} can be obtained from birch wood at a temperature of 230 °C in 3 h.",
    keywords = "Aromatics, Catalysis, Hydrogen, Lignin, Lignin first, Reforming",
    author = "Xianhong Ouyang and Xiaoming Huang and Jiadong Zhu and Michael Boot and Emiel Hensen",
    year = "2019",
    month = "7",
    day = "23",
    doi = "10.1021/acssuschemeng.9b01497",
    language = "English",
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    journal = "ACS Sustainable Chemistry & Engineering",
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    publisher = "American Chemical Society",

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    AU - Ouyang,Xianhong

    AU - Huang,Xiaoming

    AU - Zhu,Jiadong

    AU - Boot,Michael

    AU - Hensen,Emiel

    PY - 2019/7/23

    Y1 - 2019/7/23

    N2 - The valorization of lignin in renewable lignocellulosic biomass is an important target in the transition to a more sustainable production of fuels and chemicals. We present here a modification of the “lignin-first” approach that does not hinge on the use of external hydrogen. Instead, we use methanol/water mixtures as a suitable solvent that can be partly reformed into hydrogen. We propose a one-step process in which in planta lignin (wood sawdust) is converted to phenolic monomers over a Pt-based catalyst in an inert atmosphere. The role of the methanol/water mixture is not only to supply hydrogen but also to extract lignin fragments from the biomass matrix. Pt catalyzes methanol reforming to obtain hydrogen and the stabilization of reactive lignin intermediates by hydrogenation of reactive bonds. The latter aspect is crucial to avoid unfavorable condensation of fragments. Under optimized conditions, a yield of phenolic monomers of nearly 50% can be obtained from birch wood at a temperature of 230 °C in 3 h.

    AB - The valorization of lignin in renewable lignocellulosic biomass is an important target in the transition to a more sustainable production of fuels and chemicals. We present here a modification of the “lignin-first” approach that does not hinge on the use of external hydrogen. Instead, we use methanol/water mixtures as a suitable solvent that can be partly reformed into hydrogen. We propose a one-step process in which in planta lignin (wood sawdust) is converted to phenolic monomers over a Pt-based catalyst in an inert atmosphere. The role of the methanol/water mixture is not only to supply hydrogen but also to extract lignin fragments from the biomass matrix. Pt catalyzes methanol reforming to obtain hydrogen and the stabilization of reactive lignin intermediates by hydrogenation of reactive bonds. The latter aspect is crucial to avoid unfavorable condensation of fragments. Under optimized conditions, a yield of phenolic monomers of nearly 50% can be obtained from birch wood at a temperature of 230 °C in 3 h.

    KW - Aromatics

    KW - Catalysis

    KW - Hydrogen

    KW - Lignin

    KW - Lignin first

    KW - Reforming

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    U2 - 10.1021/acssuschemeng.9b01497

    DO - 10.1021/acssuschemeng.9b01497

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    EP - 13773

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