Superior separation of hemicellulose-derived sugars from eucalyptus with tropic acid pretreatment.
Superior separation of hemicellulose-derived sugars from eucalyptus with tropic acid pretreatment.
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DOI：
10.1016/j.biortech.2022.128082
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发表时间：
2022-10
影响因子：
11.4
通讯作者：
Yuqi Bao;Jiatian Zhu;Fanyan Zeng;Jiao-Bao Li;Shanshan Wang;Chengrong Qin;Chen Liang;Caoxing Huang;Shuangquan Yao
中科院分区：
文献类型：
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作者：
Yuqi Bao;Jiatian Zhu;Fanyan Zeng;Jiao-Bao Li;Shanshan Wang;Chengrong Qin;Chen Liang;Caoxing Huang;Shuangquan Yao
有机酸预处理可以有效分离生物质基半纤维素并选择性生产半纤维素衍生糖。在本研究中，在热带酸催化的桉树水热预处理中，半纤维素被分离为木糖、低聚糖。在最佳条件（5% TA，160℃，80 分钟）下，水解产物中半纤维素衍生糖的最大产量（85.78%）和 71.25% 的木糖选择性（基于原料中的总木糖）。在相似严重度因子下，与乙醇酸预处理相比，半纤维素衍生糖收率和半纤维素分离收率分别提高了11.06%和11.45%。纤维素和木质素的分离率分别降低了4.23%和0.98%。这导致残留固体具有更高的生物稳定性（更高的纤维结晶度指数、更高的热稳定性和更高的木质素含量）。因此，采用TA预处理可以获得更高的半纤维素分离选择性和丰富的半纤维素衍生糖。这项工作将提出一种生物质精炼的新方法。
Organic acid pretreatments can efficiently separate biomass-based hemicellulose and selectively produce hemicellulose-derived sugars. In this study, hemicellulose is separation as xylose, oligosaccharides in the tropic acid-catalyzed hydrothermal pretreatment of eucalyptus. The maximum yield of hemicellulose-derived sugars (85.78 %) with 71.25 % xylose selectivity (based on the total xylose in raw material) was achieved in the hydrolysate under optimal conditions (5 % TA, 160 ℃, 80 min). The yield of hemicellulose-derived sugar and the separation yield of hemicellulose increased by 11.06 % and 11.45 % compared with glycolic acid pretreatment in the similar severity factor. The separation yield of cellulose and lignin was decreased by 4.23 % and 0.98 %, respectively. This resulted in residual solids with higher biological stability (higher fiber crystallinity index, higher thermal stability, and higher lignin content). Therefore, higher hemicellulose separation selectivity and rich hemicellulose-derived sugars were obtained using TA pretreatment. The work would bring up a new method for biomass refining.