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<p>Bamboo wood, a key component of non-wood pulping black liquor, presents significant challenges for treatment due to its complex molecular structure. This study investigates the hydroliquefaction of lignin from bamboo pulping black liquor using supercritical ethanol, aiming to enhance lignin degradation and utilization. We evaluated a diverse range of hydrogenation catalysts and found that Ni/ZnO catalysts were not only cost-effective and straightforward to prepare, but also exhibit excellent hydrogenation performance. Optimization experiments revealed that lignin could be completely liquefied under Ni/ZnO catalysis at 300&#xa0;°C after 8&#xa0;h, with a remarkable catalytic activity of 15.39&#xa0;g/g<sub>cata</sub>/h for concentrated lignin solutions. Furthermore, scale-up experiments confirmed high liquefaction efficiency, even at a twentyfold increase in scale, highlighting the practical applicability and development potential of this catalyst for lignin liquefaction. These findings underscore the potential of this catalytic approach to improve the utilization of bamboo wood resources in black liquor and other biomass feedstocks, contributing to more sustainable biomass processing technologies.</p>

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Catalytic hydro-liquefaction of bamboo lignin paper waste over Ni/ZnO catalyst

  • 期刊论文

  • 发表日期：

    2025年2月25日

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  • Yunhe Ding,
  • Min Zou,
  • Yujing Weng,
  • Jian Dai,
  • Xiao Luo,
  • Yulong Zhang

摘要

Bamboo wood, a key component of non-wood pulping black liquor, presents significant challenges for treatment due to its complex molecular structure. This study investigates the hydroliquefaction of lignin from bamboo pulping black liquor using supercritical ethanol, aiming to enhance lignin degradation and utilization. We evaluated a diverse range of hydrogenation catalysts and found that Ni/ZnO catalysts were not only cost-effective and straightforward to prepare, but also exhibit excellent hydrogenation performance. Optimization experiments revealed that lignin could be completely liquefied under Ni/ZnO catalysis at 300 °C after 8 h, with a remarkable catalytic activity of 15.39 g/gcata/h for concentrated lignin solutions. Furthermore, scale-up experiments confirmed high liquefaction efficiency, even at a twentyfold increase in scale, highlighting the practical applicability and development potential of this catalyst for lignin liquefaction. These findings underscore the potential of this catalytic approach to improve the utilization of bamboo wood resources in black liquor and other biomass feedstocks, contributing to more sustainable biomass processing technologies.