Yan Chuan-Yong, Xin Liang, Zheng Quan-Xi
China University of Mining & Technology, Xuzhou 221116, Jiangsu, China.
School of Chemical Engineering, Xuzhou College of Industrial Technology, Xuzhou 221140, Jiangsu, China.
ACS Omega. 2024 Nov 15;9(47):46743-46750. doi: 10.1021/acsomega.3c09582. eCollection 2024 Nov 26.
. AH pretreatment (PT) enhances the conversion and selectivity of RS and WS in supercritical methanolysis. In this work, we investigated how . AH-containing PT affected the structure of wheat straw (WS) and rice straw (RS). The enhanced straw supercritical methanolysis was mostly ascribed to structural changes in RS and WS during PT based on thorough investigations by thermogravimetry/differential thermogravimetry (TG/DTG), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The TG/DTG study revealed that PT could only partially degrade RS and WS without significantly changing the makeup of their group. PT is effective at breaking the structure because XRD research showed that it could only somewhat alter the crystal structure of RS and WS, decreasing their crystallinity. The primary way that PT affects RS and WS is by the decrystallization of cellulose and hemicelluloses into an amorphous material. The comparative concentrations of certain molecules are altered by PT, according to XPS examination of these compounds. PT is an efficient biomass liquefaction preparation that minimizes carbohydrate loss by disrupting the structure of the biomass.
碱预处理（PT）提高了超临界甲醇解中稻草（RS）和麦草（WS）的转化率和选择性。在本研究中，我们探究了含碱的PT如何影响麦草（WS）和稻草（RS）的结构。基于热重分析/微商热重分析（TG/DTG）、X射线衍射（XRD）和X射线光电子能谱（XPS）的深入研究，稻草超临界甲醇解的增强主要归因于PT过程中RS和WS的结构变化。TG/DTG研究表明，PT只能部分降解RS和WS，而不会显著改变它们的基团组成。PT在破坏结构方面是有效的，因为XRD研究表明，它只能略微改变RS和WS的晶体结构，降低它们的结晶度。PT影响RS和WS的主要方式是将纤维素和半纤维素解结晶为无定形材料。根据对这些化合物的XPS检测，PT改变了某些分子的相对浓度。PT是一种高效的生物质液化制备方法，通过破坏生物质的结构将碳水化合物损失降至最低。
