Catalytic depolymerization of a lignin-rich corncob residue into aromatics in supercritical ethanol over an alumina-supported nimo alloy catalyst

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Catalytic depolymerization of a lignin-rich corncob residue into aromatics in supercritical ethanol over an alumina-supported nimo alloy catalyst. / Bai, Yunfei; Cui, Kai; Sang, Yushuai; Wu, Kai; Yan, Fei; Mai, Fuhang; Ma, Zewei; Wen, Zhe; Chen, Hong; Chen, Mengmeng; Li, Yongdan.

In: Energy and Fuels, Vol. 33, No. 9, 19.09.2019, p. 8657-8665.

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Bai, Yunfei ; Cui, Kai ; Sang, Yushuai ; Wu, Kai ; Yan, Fei ; Mai, Fuhang ; Ma, Zewei ; Wen, Zhe ; Chen, Hong ; Chen, Mengmeng ; Li, Yongdan. / Catalytic depolymerization of a lignin-rich corncob residue into aromatics in supercritical ethanol over an alumina-supported nimo alloy catalyst. In: Energy and Fuels. 2019 ; Vol. 33, No. 9. pp. 8657-8665.

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@article{ef41021d452e40a0a3b13eb3fe112a6b,
title = "Catalytic depolymerization of a lignin-rich corncob residue into aromatics in supercritical ethanol over an alumina-supported nimo alloy catalyst",
abstract = "A one-pot process for the depolymerization of lignin-rich corncob residue (LRCR) is investigated in supercritical ethanol over an alumina-supported NiMo (NiMo/Al) alloy catalyst. The LRCR, as a major byproduct in the corncob enzymatic hydrolysis process, was completely liquefied and effectively transformed into aromatic compounds without the formation of tar or char under optimal reaction conditions. The reaction temperature, time, solvent, and initial hydrogen pressure have significant effects on the depolymerization of LRCR. The highest overall aromatic yield of 255.4 mg/g of LRCR with 57.9 wt {\%} alkylphenols (e.g., 4-ethylphenol, 2,5-diethylphenol, and 2,6-diisopropylphenol) was achieved with an initial 27.6 bar (gauge) of hydrogen in supercritical ethanol at 320 °C for 7.5 h. The depolymerization of LRCR is also examined over Ni/γ-Al2O3, Mo/γ-Al2O3, and the physical mixture of these two catalysts. The NiMo/Al alloy catalyst exhibits much higher activity than that of other catalysts, and a synergistic effect between Ni and Mo active species is proposed. Furthermore, X-ray powder diffraction results show that the Mo1.24Ni0.76 alloy is expected to be an important active species for the depolymerization reaction.",
author = "Yunfei Bai and Kai Cui and Yushuai Sang and Kai Wu and Fei Yan and Fuhang Mai and Zewei Ma and Zhe Wen and Hong Chen and Mengmeng Chen and Yongdan Li",
year = "2019",
month = "9",
day = "19",
doi = "10.1021/acs.energyfuels.9b01457",
language = "English",
volume = "33",
pages = "8657--8665",
journal = "Energy and Fuels",
issn = "0887-0624",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "9",

}

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TY - JOUR

T1 - Catalytic depolymerization of a lignin-rich corncob residue into aromatics in supercritical ethanol over an alumina-supported nimo alloy catalyst

AU - Bai, Yunfei

AU - Cui, Kai

AU - Sang, Yushuai

AU - Wu, Kai

AU - Yan, Fei

AU - Mai, Fuhang

AU - Ma, Zewei

AU - Wen, Zhe

AU - Chen, Hong

AU - Chen, Mengmeng

AU - Li, Yongdan

PY - 2019/9/19

Y1 - 2019/9/19

N2 - A one-pot process for the depolymerization of lignin-rich corncob residue (LRCR) is investigated in supercritical ethanol over an alumina-supported NiMo (NiMo/Al) alloy catalyst. The LRCR, as a major byproduct in the corncob enzymatic hydrolysis process, was completely liquefied and effectively transformed into aromatic compounds without the formation of tar or char under optimal reaction conditions. The reaction temperature, time, solvent, and initial hydrogen pressure have significant effects on the depolymerization of LRCR. The highest overall aromatic yield of 255.4 mg/g of LRCR with 57.9 wt % alkylphenols (e.g., 4-ethylphenol, 2,5-diethylphenol, and 2,6-diisopropylphenol) was achieved with an initial 27.6 bar (gauge) of hydrogen in supercritical ethanol at 320 °C for 7.5 h. The depolymerization of LRCR is also examined over Ni/γ-Al2O3, Mo/γ-Al2O3, and the physical mixture of these two catalysts. The NiMo/Al alloy catalyst exhibits much higher activity than that of other catalysts, and a synergistic effect between Ni and Mo active species is proposed. Furthermore, X-ray powder diffraction results show that the Mo1.24Ni0.76 alloy is expected to be an important active species for the depolymerization reaction.

AB - A one-pot process for the depolymerization of lignin-rich corncob residue (LRCR) is investigated in supercritical ethanol over an alumina-supported NiMo (NiMo/Al) alloy catalyst. The LRCR, as a major byproduct in the corncob enzymatic hydrolysis process, was completely liquefied and effectively transformed into aromatic compounds without the formation of tar or char under optimal reaction conditions. The reaction temperature, time, solvent, and initial hydrogen pressure have significant effects on the depolymerization of LRCR. The highest overall aromatic yield of 255.4 mg/g of LRCR with 57.9 wt % alkylphenols (e.g., 4-ethylphenol, 2,5-diethylphenol, and 2,6-diisopropylphenol) was achieved with an initial 27.6 bar (gauge) of hydrogen in supercritical ethanol at 320 °C for 7.5 h. The depolymerization of LRCR is also examined over Ni/γ-Al2O3, Mo/γ-Al2O3, and the physical mixture of these two catalysts. The NiMo/Al alloy catalyst exhibits much higher activity than that of other catalysts, and a synergistic effect between Ni and Mo active species is proposed. Furthermore, X-ray powder diffraction results show that the Mo1.24Ni0.76 alloy is expected to be an important active species for the depolymerization reaction.

UR - http://www.scopus.com/inward/record.url?scp=85072630887&partnerID=8YFLogxK

U2 - 10.1021/acs.energyfuels.9b01457

DO - 10.1021/acs.energyfuels.9b01457

M3 - Article

VL - 33

SP - 8657

EP - 8665

JO - Energy and Fuels

JF - Energy and Fuels

SN - 0887-0624

IS - 9

ER -

ID: 37758129