Elucidation of mixed surfactants reducing mass transfer resistance during high-solids enzymatic hydrolysis from lignocellulosic biomass

文献类型： 外文期刊

第一作者： Liu, Qiangqiang

作者： Liu, Qiangqiang;Sun, Chihe;Madadi, Meysam;Sun, Fubao;Zhang, Ezhen;Xia, Ao;Samimi, Abdolreza

作者机构：

关键词： Lignocellulosic Biomass; Enzymatic Hydrolysis; Mass Transfer Characteristics; Surfactant Synergy; Diffusion

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 507 卷

页码：

收录情况： SCI

摘要： The production of fermentable sugars from lignocellulosic biomass (LCB) via high-solids enzymatic hydrolysis (EH) is crucial for sustainable enzyme-based biorefineries. However, multi-scale mass transfer resistance limits EH efficiency, particularly under conditions of low cellulase dosages and high substrate loadings. This study revealed the substantial benefits of a synergistic surfactant formulation in enhancing the transfer behavior of cellulases and sugar products. From a macroscopic scale, ternary surfactants (Tween 60, Triton X-114, and CTAB) markedly reduced the slurry viscosity by 48 %similar to 65 % compared to control groups, promoting efficient convective diffusion of cellulases to particle surfaces during the early EH stage. At the subsequent pore-scale rate-limiting process, mixed surfactants helped cellulases stay in their monomeric form (< 8.9 nm), reducing steric hindrance in internal micropores. Also, the uniform substrate dispersion with fewer secondary pores among aggregated particles resulted in 56 % and 115 % increases in transfer resistance constants and protein adsorption rates, respectively. Essentially, the increased water activity (with 80 % more free water) and reduced particle interactions (solid-liquid interfacial tension reduced by up to 78 %) were the key drivers in improving mass transfer in the presence of mixed surfactants. Overall, surfactant synergism achieved a total sugar titer of 146 g/L during 20 % batch EH, leading to similar to 80 % of both 72-h glucose and xylose yields. This study provides valuable insights into the multi-scale mass transfer enhancement achieved through synergistic surfactant action in highsolids EH.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序