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<p>In the context of global carbon neutrality, biomass CO<sub>2</sub> gasification technology has attracted significant attention due to its carbon cycling properties. The lignin enrichment and structural changes of biomass during microbial degradation enhance subsequent gasification by enhancing the diffusion and mass transfer efficiency of CO<sub>2</sub> and potentially providing a more reactive carbon framework. In this study, the effect of natural degradation (ND) and anaerobic digestion (AD) pretreatment on the CO<sub>2</sub> gasification performance of waste poplar wood was investigated. The results demonstrated that AD pretreatment resulted in a substantial enrichment of lignin, and a concomitant increase in the concentration of catalytic elements, including Fe and Al. This enhancement promoted the Boudouard reaction, resulting in a 47%, 48% and 92% increase in H<sub>2</sub>, CO, and CH<sub>4</sub> yields at 800&#xa0;°C, respectively. ND pretreatment resulted in the formation of a porous structure through hemicellulose degradation (18–25%), leading to higher H<sub>2</sub>, CO, and CH<sub>4</sub> yields at 800&#xa0;°C of 83%, 40% and 36%, respectively. Both pretreatments reduced the yield of heavy tar (molar mass &gt; 300&#xa0;g/mol) and increased the proportion of light hydrocarbons. This study demonstrates that ND and AD pretreatments are effective and green strategies for valorization of poplar wood into high-quality syngas, while simultaneously reducing tar waste, offering significant insights for sustainable waste-to-energy conversion. </p> Graphical Abstract <p></p>

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Effect of Biological Pretreatment on Structural Evolution and Performance of Waste Poplar Wood for Enhanced CO2 Gasification

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Guien Zhou,
  • Mingyu Ma,
  • Yang Chen,
  • Xi Wang,
  • Juan Wu,
  • Jiahui Li,
  • Muzamil Ali Brohi,
  • Dengxin Li,
  • Wenjing Sang,
  • Shihong Xu,
  • Fei Xue

摘要

In the context of global carbon neutrality, biomass CO2 gasification technology has attracted significant attention due to its carbon cycling properties. The lignin enrichment and structural changes of biomass during microbial degradation enhance subsequent gasification by enhancing the diffusion and mass transfer efficiency of CO2 and potentially providing a more reactive carbon framework. In this study, the effect of natural degradation (ND) and anaerobic digestion (AD) pretreatment on the CO2 gasification performance of waste poplar wood was investigated. The results demonstrated that AD pretreatment resulted in a substantial enrichment of lignin, and a concomitant increase in the concentration of catalytic elements, including Fe and Al. This enhancement promoted the Boudouard reaction, resulting in a 47%, 48% and 92% increase in H2, CO, and CH4 yields at 800 °C, respectively. ND pretreatment resulted in the formation of a porous structure through hemicellulose degradation (18–25%), leading to higher H2, CO, and CH4 yields at 800 °C of 83%, 40% and 36%, respectively. Both pretreatments reduced the yield of heavy tar (molar mass > 300 g/mol) and increased the proportion of light hydrocarbons. This study demonstrates that ND and AD pretreatments are effective and green strategies for valorization of poplar wood into high-quality syngas, while simultaneously reducing tar waste, offering significant insights for sustainable waste-to-energy conversion.

Graphical Abstract