Kilpinen A Topias, Pääkkönen Timo, Nieminen Kaarlo, Kontturi Eero
Department of Bioproducts and Biosystems, Aalto University, P.O. Box 16300, FI-00076 Aalto, Finland.
Nordic Bioproducts Group Oy, Tietotie 1, 02150 Espoo, Finland.
Ind Eng Chem Res. 2023 Oct 4;62(41):16922-16930. doi: 10.1021/acs.iecr.3c01894. eCollection 2023 Oct 18.
The aim of this study was to optimize the reaction conditions for concentrated acid hydrolysis of aspen wood flour by employing anhydrous hydrogen chloride gas to produce fermentable sugars. Gas hydrolysis with HCl was conducted both with and without temperature control during hydrolysis under a relatively low pressure of 0.1 MPa. Process parameters for HCl gas hydrolysis included the moisture content of aspen wood flour (0.7-50%) and reaction time under pressure (30 min to 24 h). In addition, liquid-phase hydrolysis with concentrated hydrochloric acid was conducted in concentrations of 32-42% and 15 min to 24 h reaction times for comparison with the gas-phase process. The highest yields (>90%) for water-soluble carbohydrates from aspen wood flour were achieved with temperature-controlled gas hydrolysis using 50% moisture content and 2 h total reaction time, which is in line with the previous research and comparable to hydrolysis with concentrated (42%) hydrochloric acid.
本研究的目的是通过使用无水氯化氢气体优化白杨木粉浓酸水解的反应条件，以生产可发酵糖。在0.1MPa的相对低压下，进行了有无水解温度控制的HCl气体水解。HCl气体水解的工艺参数包括白杨木粉的水分含量（0.7-50%）和加压反应时间（30分钟至24小时）。此外，进行了浓度为32-42%的浓盐酸液相水解，并反应15分钟至24小时，以与气相工艺进行比较。使用50%水分含量并总反应时间为2小时的温度控制气体水解，可实现白杨木粉水溶性碳水化合物的最高产率（>90%），这与先前的研究一致，且与用浓（42%）盐酸水解相当。
