γ-戊内酯生物炼制：催化桦木分级分离及制浆废水的增值利用与溶剂回收
Gamma-valerolactone biorefinery: Catalyzed birch fractionation and valorization of pulping streams with solvent recovery.
作者信息
Granatier Marianna, Lê Huy Quang, Ma Yibo, Rissanen Marja, Schlapp-Hackl Inge, Diment Daryna, Zaykovskaya Anna, Pokki Juha-Pekka, Balakshin Mikhail, Louhi-Kultanen Marjatta, Alopaeus Ville, Sixta Herbert
机构信息
School of Chemical Engineering, Department of Biosystems and Bioproducts, Aalto University, Vuorimiehentie 1, 02150, Espoo, Finland.
Department of Materials Science, University of Tampere, Kuntokatu 3, 33520, Tampere, Finland.
出版信息
Heliyon. 2023 Jun 19;9(6):e17423. doi: 10.1016/j.heliyon.2023.e17423. eCollection 2023 Jun.
In this study, we propose a full gamma-valerolactone (GVL) organosolv biorefinery concept including the utilization of all pulping streams, solvent recovery, and preliminary material and energy balances. GVL is a renewable and non-toxic solvent that fractionates woody biomass. The silver birch chips were pulped (45-65 wt% GVL, 150 °C, 2 h) under a series of acid-catalyzed conditions (5-12 kg HSO/t), and the fully bleached pulp was spun into fibers by the IONCELL® process and knitted into the fabric. The dissolved lignin was precipitated by water from spent liquor (1:1) and processed into polyhydroxyurethane. Most of the dissolved hemicelluloses were in the form of xylose, therefore, the crystallization efficiency of xylose from spent liquor in the presence of residual GVL was studied. The GVL recovery rate in the lab column was 66%, however by increasing the number of equilibrium stages, 99% recovery could be achieved.
在本研究中，我们提出了一种全γ-戊内酯（GVL）有机溶剂生物精炼概念，包括利用所有制浆流股、溶剂回收以及初步的物料和能量平衡。GVL是一种可再生且无毒的溶剂，用于分馏木质生物质。在一系列酸催化条件（5 - 12 kg H₂SO₄/t）下，对银桦木片进行制浆（45 - 65 wt% GVL，150 °C，2小时），然后通过IONCELL®工艺将全漂浆纺成纤维并编织成织物。溶解的木质素通过水从废液（1:1）中沉淀出来，并加工成聚羟基聚氨酯。大部分溶解的半纤维素以木糖的形式存在，因此，研究了在残留GVL存在下从废液中结晶木糖的效率。实验室柱中GVL的回收率为66%，然而，通过增加平衡级数，可实现99%的回收率。
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