Conversion Characteristics of Chemical Constituents in Liriodendron tulipifera and Their Influences on Biomass Recalcitrance during Acid-Catalyzed Organosolv Pretreatment

Q2 Engineering Journal of the Korean wood science and technology Pub Date : 2024-03-01 DOI:10.5658/wood.2024.52.2.101

K. Gwak, Jun-Ho Shin, Chae-Hwi Yoon, In-Gyu Choi

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Abstract

The conversion characteristics of the major components of Liriodendron tulipifera were investigated during acid-catalyzed organosolv pretreatment. Glucan in L. tulipifera was slowly hydrolyzed, whereas xylan was rapidly hydrolyzed. Simultaneous hydrolysis and degradation of xylan and lignin occurred; however, after complete hydrolysis of xylan at higher temperatures, lignin remained and was not completely degraded or solubilized. These conversion characteristics influence the structural properties of glucan in L. tulipifera . Critical hydrolysis of the crystalline regions in glucan occurred along with rapid hydrolysis of the amorphous regions in xylan and lignin. Breakdown of internal lignin and xylan bonds, along with solubilization of lignin, causes destruction of the lignin-carbohydrate complex. Over a temperature of 160℃, the lignin that remained was coalesced, migrated, and re-deposited on the surface of pretreated solid residue, resulting in a drastic increase in the number and content of lignin droplets. From the results, the characteristic conversions of each constituent and the changes in the structural properties in L. tulipifera effectively improved enzymatic hydrolysis in the range of 140℃–150℃. Therefore, it can be concluded that significant changes in the biomass recalcitrance of L. tulipifera occurred during organosolv pretreatment.

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酸催化有机溶胶预处理过程中 Liriodendron tulipifera 中化学成分的转化特征及其对生物质再抗性的影响

研究了在酸催化有机溶胶预处理过程中郁金香主要成分的转化特性。郁金香中的葡聚糖被缓慢水解，而木聚糖则被快速水解。木聚糖和木质素同时发生水解和降解；然而，木聚糖在较高温度下完全水解后，木质素仍然存在，没有完全降解或溶解。这些转化特征影响了 L. tulipifera 中葡聚糖的结构特性。在木聚糖和木质素的无定形区域快速水解的同时，葡聚糖的结晶区域也发生了临界水解。木质素和木聚糖内部键的断裂以及木质素的溶解导致了木质素-碳水化合物复合物的破坏。在 160℃的温度下，残留的木质素凝聚、迁移并重新沉积在预处理过的固体残渣表面，导致木质素液滴的数量和含量急剧增加。从结果来看，在 140℃-150℃ 范围内，郁金香中各成分的特征转化率和结构特性的变化有效地改善了酶水解作用。因此，可以得出结论：在有机溶胶预处理过程中，郁金香的生物质再钙化性发生了显著变化。

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来源期刊

Journal of the Korean wood science and technology Materials Science-Materials Science (miscellaneous)

CiteScore

5.20

自引率

0.00%

发文量

期刊介绍： The Journal of the Korean Wood Science and Technology (JKWST) launched in 1973 as an official publication of the Korean Society of Wood Science and Technology has been served as a core of knowledges on wood science and technology. The Journal acts as a medium for the exchange of research in the area of science and technology related to wood, and publishes results on the biology, chemistry, physics and technology of wood and wood-based products. Research results about applied sciences of wood-based materials are also welcome. The Journal is published bimonthly, and printing six issues per year. Supplemental or special issues are published occasionally. The abbreviated and official title of the journal is ''J. Korean Wood Sci. Technol.''. All submitted manuscripts written in Korean or English are peer-reviewed by more than two reviewers. The title, abstract, acknowledgement, references, and captions of figures and tables should be provided in English for all submitted manuscripts.