Abstract This work evaluates a continuous biomass hydrothermal carbonization process through modeling and steady state simulation using the UniSim Design process simulator. The reactive process was divided into four stages: biomass hydrolysis, intermediate compounds degradation, aromatics formation, and polymerization process, which make it possible to obtain the solid product or hydrochar. Pure biomass types and their mixtures were compared, considering hydrochar and carbon yields, H/C, and O/C ratios, and their deviation from the batch process. The results of hydrochar yield indicated that biomass with high cellulose content can perform satisfactorily in the proposed model. In addition, the possibility of carrying out the process in reactive stages together with the recirculation of liquid product, allowed a greater yield with respect to the batch process. It is concluded that the proposed model improves the characteristics of the obtained hydrochar compared to its crude biomass, achieving lower proportions of hydrogen and oxygen in the solid product.

中文翻译：

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连续生物质水热碳化过程建模与仿真

摘要 这项工作通过使用 UniSim Design 过程模拟器进行建模和稳态模拟来评估连续生物质热液碳化过程。反应过程分为四个阶段：生物质水解、中间化合物降解、芳烃形成和聚合过程，这使得获得固体产物或水炭成为可能。比较了纯生物质类型及其混合物，考虑了碳氢化合物和碳产量、H/C 和 O/C 比率，以及它们与批处理过程的偏差。Hydrochar 产量的结果表明，具有高纤维素含量的生物质可以在所提出的模型中令人满意地执行。此外，可以在反应阶段进行该过程以及液体产品的再循环，相对于批处理而言，允许更高的产量。得出的结论是，与粗生物质相比，所提出的模型改善了所获得的水炭的特性，实现了固体产品中氢和氧的较低比例。