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Oxidative Depolymerisation of Lignosulphonate Lignin into Low-Molecular-Weight Products with Cu–Mn/δ-Al 2 O 3

Abdelaziz, Omar Y. LU ; Meier, Sebastian; Prothmann, Jens LU ; Turner, Charlotta LU ; Riisager, Anders and Hulteberg, Christian P. LU (2019) In Topics in Catalysis p.1-10
Abstract

Lignin depolymerisation receives great attention due to the pressing need to find sustainable alternatives to fossil sources for production of fuels and chemicals. In this study, alumina-supported Cu–Mn and Ni–Mo catalysts were tested for oxidative depolymerisation of a technical lignin stream—sodium lignosulphonates—to produce valuable low-molecular-weight aromatics that may be considered for applications in the fuels and chemicals sector. The reactions were performed at elevated temperature and oxygen pressure, and the product mixtures were analysed by size exclusion chromatography, two-dimensional nuclear magnetic resonance spectroscopy and supercritical fluid chromatography... (More)

Lignin depolymerisation receives great attention due to the pressing need to find sustainable alternatives to fossil sources for production of fuels and chemicals. In this study, alumina-supported Cu–Mn and Ni–Mo catalysts were tested for oxidative depolymerisation of a technical lignin stream—sodium lignosulphonates—to produce valuable low-molecular-weight aromatics that may be considered for applications in the fuels and chemicals sector. The reactions were performed at elevated temperature and oxygen pressure, and the product mixtures were analysed by size exclusion chromatography, two-dimensional nuclear magnetic resonance spectroscopy and supercritical fluid chromatography mass spectrometry. The best performance was obtained with Cu–Mn/δ-Al 2 O 3 , which was thoroughly characterised before and after use by nitrogen physisorption, scanning electron microscopy, energy dispersive spectroscopy, powder X-ray diffraction, thermal gravimetric analysis, inductively coupled plasma optical emission spectrometry and X-ray photoelectron spectroscopy. Major products identified were vanillin, p-hydroxybenzaldehyde, vanillic acid and p-hydroxybenzoic acid as well as smaller aliphatic aldehydes, acids and lactones.

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organization
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type
Contribution to journal
publication status
published
subject
keywords
Catalytic oxidation, Cu–Mn/Al O catalyst, Heterogeneous catalysis, Lignin valorisation, Sodium lignosulphonates
in
Topics in Catalysis
pages
1 - 10
publisher
Kluwer
external identifiers
  • scopus:85062673845
ISSN
1022-5528
DOI
10.1007/s11244-019-01146-5
language
English
LU publication?
yes
id
f6cf680c-c56c-4810-b0a3-0e7c77253281
date added to LUP
2019-03-19 10:16:19
date last changed
2019-04-23 04:46:56
@article{f6cf680c-c56c-4810-b0a3-0e7c77253281,
  abstract     = {<p>                                                         Lignin depolymerisation receives great attention due to the pressing need to find sustainable alternatives to fossil sources for production of fuels and chemicals. In this study, alumina-supported Cu–Mn and Ni–Mo catalysts were tested for oxidative depolymerisation of a technical lignin stream—sodium lignosulphonates—to produce valuable low-molecular-weight aromatics that may be considered for applications in the fuels and chemicals sector. The reactions were performed at elevated temperature and oxygen pressure, and the product mixtures were analysed by size exclusion chromatography, two-dimensional nuclear magnetic resonance spectroscopy and supercritical fluid chromatography mass spectrometry. The best performance was obtained with Cu–Mn/δ-Al                                                         <sub>2</sub>                                                         O                                                         <sub>3</sub>                                                         , which was thoroughly characterised before and after use by nitrogen physisorption, scanning electron microscopy, energy dispersive spectroscopy, powder X-ray diffraction, thermal gravimetric analysis, inductively coupled plasma optical emission spectrometry and X-ray photoelectron spectroscopy. Major products identified were vanillin, p-hydroxybenzaldehyde, vanillic acid and p-hydroxybenzoic acid as well as smaller aliphatic aldehydes, acids and lactones.                                                 </p>},
  author       = {Abdelaziz, Omar Y. and Meier, Sebastian and Prothmann, Jens and Turner, Charlotta and Riisager, Anders and Hulteberg, Christian P.},
  issn         = {1022-5528},
  keyword      = {Catalytic oxidation,Cu–Mn/Al O catalyst,Heterogeneous catalysis,Lignin valorisation,Sodium lignosulphonates},
  language     = {eng},
  month        = {01},
  pages        = {1--10},
  publisher    = {Kluwer},
  series       = {Topics in Catalysis},
  title        = {Oxidative Depolymerisation of Lignosulphonate Lignin into Low-Molecular-Weight Products with Cu–Mn/δ-Al                         
                        <sub>2</sub>
                                                 O                         
                        <sub>3</sub>},
  url          = {http://dx.doi.org/10.1007/s11244-019-01146-5},
  year         = {2019},
}