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<p>Scaling up extraction processes requires predicting structural performance in pretreatment reactors, which requires computational fluid dynamics (CFD) and finite element analysis (FEA). To solve the lack of reactor design for biopolymer extraction, this work investigates the design of a novel 20 L semi-pilot scale reactor based on 304 stainless steel for pretreating sawdust (SW) biomass to extract cellulose. CFD and FEA were employed to simulate the cooling process using a helical coil heat exchanger at varying water mass flow rates (2–40&#xa0;kg/min) and mixing at different impeller speeds (400–1720&#xa0;rpm). Stress, strain, and fatigue analyses were conducted on the impeller, shaft, and reactor wall. Fluid–structure interaction was considered to assess fluid effects on the reactor’s structure. Simulations indicate that uniform mixing and pressure resistance are achieved at 1720&#xa0;rpm, with a water mass flow rate exceeding 20&#xa0;kg/min, ensuring adequate cooling and preventing biomass degradation. This research provides insights into the complex interactions between the chemical solution and the solid biomass within the reactor, addressing potential corrosion issues and aiming to enhance the energetic efficiency and scalability of cellulose extraction from woody biomass.</p>

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Design of a vertical reactor for pretreating woody biomass to extract cellulose biopolymer

  • 期刊论文

  • 发表日期：

    2025年7月7日

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  • Roberto Cárdenas Zapata,
  • Juan Carlos Hernández Ayala,
  • Diana Palma Ramírez,
  • Juan Carlos Paredes Rojas,
  • Christopher Torres San Miguel

摘要

Scaling up extraction processes requires predicting structural performance in pretreatment reactors, which requires computational fluid dynamics (CFD) and finite element analysis (FEA). To solve the lack of reactor design for biopolymer extraction, this work investigates the design of a novel 20 L semi-pilot scale reactor based on 304 stainless steel for pretreating sawdust (SW) biomass to extract cellulose. CFD and FEA were employed to simulate the cooling process using a helical coil heat exchanger at varying water mass flow rates (2–40 kg/min) and mixing at different impeller speeds (400–1720 rpm). Stress, strain, and fatigue analyses were conducted on the impeller, shaft, and reactor wall. Fluid–structure interaction was considered to assess fluid effects on the reactor’s structure. Simulations indicate that uniform mixing and pressure resistance are achieved at 1720 rpm, with a water mass flow rate exceeding 20 kg/min, ensuring adequate cooling and preventing biomass degradation. This research provides insights into the complex interactions between the chemical solution and the solid biomass within the reactor, addressing potential corrosion issues and aiming to enhance the energetic efficiency and scalability of cellulose extraction from woody biomass.