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Lignocellulosic Ethanol Biorefinery: Valorization of Lignin-Rich Stream through Hydrothermal Liquefaction

Miliotti, Edoardo; Dell'Orco, Stefano; Lotti, Giulia; Rizzo, Andrea Maria; Rosi, Luca; Chiaramonti, David


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{
  "description": "<p>Hydrothermal liquefaction of lignin-rich stream from lignocellulosic ethanol production at an industrial scale was carried out in a custom-made batch test bench. Light and heavy fractions of the HTL biocrude were collected following an ad-hoc developed two-steps solvent extraction method. A full factorial design of experiment was performed, investigating the influence of temperature, time and biomass-to-water mass ratio (B/W) on product yields, biocrude elemental composition, molecular weight and carbon balance. Total biocrude yields ranged from 39.8% to 65.7% w/w. The Temperature was the main influencing parameter as regards the distribution between the light and heavy fractions of the produced biocrude: the highest amount of heavy biocrude was recovered at 300 &deg;C, while at 350 and 370 &deg;C the yield of the light fraction increased, reaching 41.7% w/w at 370 &deg;C. Instead, the B/W ratio did not have a significant effect on light and heavy biocrude yields. Feedstock carbon content was mainly recovered in the biocrude (up to 77.6% w/w). The distribution between the light and heavy fractions followed the same trend as the yields. The typical aromatic structure of the lignin-rich stream was also observed in the biocrudes, indicating that mainly hydrolysis depolymerization occurred. The weight-average molecular weight of the total biocrude was strictly related to the process temperature, decreasing from 1146 at 300 &deg;C to 565 g mol&minus;1 at 370 &deg;C.</p>", 
  "license": "https://creativecommons.org/licenses/by/4.0/legalcode", 
  "creator": [
    {
      "affiliation": "RE-CORD", 
      "@id": "https://orcid.org/0000-0001-8260-899X", 
      "@type": "Person", 
      "name": "Miliotti, Edoardo"
    }, 
    {
      "affiliation": "RE-CORD, University of Florence", 
      "@type": "Person", 
      "name": "Dell'Orco, Stefano"
    }, 
    {
      "affiliation": "RE-CORD", 
      "@type": "Person", 
      "name": "Lotti, Giulia"
    }, 
    {
      "affiliation": "RE-CORD", 
      "@type": "Person", 
      "name": "Rizzo, Andrea Maria"
    }, 
    {
      "affiliation": "RE-CORD, University of Florence", 
      "@type": "Person", 
      "name": "Rosi, Luca"
    }, 
    {
      "affiliation": "RE-CORD, University of Florence", 
      "@type": "Person", 
      "name": "Chiaramonti, David"
    }
  ], 
  "headline": "Lignocellulosic Ethanol Biorefinery: Valorization of Lignin-Rich Stream through Hydrothermal Liquefaction", 
  "image": "https://zenodo.org/static/img/logos/zenodo-gradient-round.svg", 
  "datePublished": "2019-02-22", 
  "url": "https://zenodo.org/record/2633038", 
  "keywords": [
    "lignin; biorefinery; hydrothermal liquefaction; biocrude; depolymerization"
  ], 
  "@context": "https://schema.org/", 
  "identifier": "https://doi.org/10.3390/en12040723", 
  "@id": "https://doi.org/10.3390/en12040723", 
  "@type": "ScholarlyArticle", 
  "name": "Lignocellulosic Ethanol Biorefinery: Valorization of Lignin-Rich Stream through Hydrothermal Liquefaction"
}
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