Key Laboratory of Industrial Biocatalysis, Ministry of Education, Tsinghua University, Beijing 100084, China; Institute of Applied Chemistry, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Engineering and Processing Division, Malaysian Palm Oil Board, 6, Persiaran Institusi, Bandar Baru Bangi, 43000 Kajang, Selangor, Malaysia.
Bioresour Technol. 2023 Mar;372:128626. doi: 10.1016/j.biortech.2023.128626. Epub 2023 Jan 13.
A novel process for simultaneous production of furfural and pretreatment of oil palm empty fruit bunch (EFB) by dilute acid pre-hydrolysis was developed based on non-isothermal kinetic modeling. Mass transfer analysis suggested that the internal diffusion could be neglected as diffusion time of sulfuric acid in EFB particles was significantly shorter than the pre-hydrolysis period, whereas the heating stage could not be neglected due to a significant part of xylan was solubilized at the stage. A strategy for increasing furfural yield was developed by intermittent discharging of steam, resulting in 71.4 % furfural yield. The pretreated solids showed good enzymatic digestibility. 136.3 g/L glucose corresponding to 81.6 % yield was obtained by high-solid loading hydrolysis. 95.4 g furfural and 212 g glucose could be obtained from 1 kg dry EFB. Therefore, non-isothermal effects on polysaccharide hydrolysis and pentose decomposition should be considered carefully for an efficient process design of EFB biorefining.
基于非等温动力学模型，开发了一种通过稀酸预处理同时生产糠醛和预处理油棕空果串（EFB）的新方法。传质分析表明，内部扩散可以忽略不计，因为硫酸在 EFB 颗粒中的扩散时间明显短于预水解时间，而加热阶段不能忽略，因为在该阶段有很大一部分木聚糖被溶解。通过间歇排出蒸汽的策略提高了糠醛的得率，得到了 71.4%的糠醛得率。预处理后的固体表现出良好的酶解可消化性。通过高固体负载水解，可获得 136.3 g/L 葡萄糖，产率为 81.6%。从 1 公斤干 EFB 中可获得 95.4 g 糠醛和 212 g 葡萄糖。因此，在设计 EFB 生物炼制的有效工艺时，应仔细考虑非等温效应对多糖水解和戊糖分解的影响。
