| [BMIM]HSO4/乙醇降解纤维素残渣的热解行为和产物分布 |
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| 引用本文： | 杨华美,黄 勇,罗 楷,陈紫钦,李 靖,刘云飞,杨萧意辞.[BMIM]HSO4/乙醇降解纤维素残渣的热解行为和产物分布[J].福州大学学报(自然科学版),2023,51(6):865-871. |
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| 作者姓名： | 杨华美 黄 勇 罗 楷 陈紫钦 李 靖 刘云飞 杨萧意辞 |
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| 作者单位： | 徐州工程学院 材料与化学工程学院,南京林业大学材料科学与工程学院,徐州工程学院 材料与化学工程学院,徐州工程学院 材料与化学工程学院,徐州工程学院 材料与化学工程学院,徐州工程学院 材料与化学工程学院,徐州工程学院 材料与化学工程学院 |
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| 基金项目： | 江苏省自然科学基金项目（BK20190156）；徐州市应用基础研究计划项目（KC21286）. |
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| 摘 要： | 以微晶纤维素为原料，利用1-丁基-3甲基咪唑硫酸氢盐（BMIM]HSO4）与乙醇二元溶剂体系在180 oC下进行催化降解制备得到纤维素固体残渣（SRE），并考察了BMIM]HSO4质量浓度对SRE结构特征和热解过程的影响规律，为SRE的资源化利用提供理论基础。通过FTIR、Raman、XRD、SEM和激光粒度分析仪对样品进行结构表征，结果表明SRE保持了纤维素化学结构，但随着BMIM]HSO4质量浓度的增加，SRE粒径显著降低，晶体结构不断被破环并转化为热不稳定的无定形结构。通过热重分析仪和管式反应器研究SRE的热解行为规律，结果表明：随着BMIM]HSO4质量浓度的增加，SRE热失重起始温度显著降低，热失重曲线向低温区移动。同时，随BMIM]HSO4浓度的增加，促进了可挥发分与残渣的气固作用，引起焦炭和气体产率增加，生物油产率降低；生物油成分中D-Allose的产率随BMIM]HSO4浓度的增加大幅降低，而左旋葡萄糖酮和5-羟甲基糠醛、糠醛等含量升高，即BMIM]HSO4浓度的增加有利于SRE转化生产糠醛等小分子生物质基平台化合物。
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| 关 键 词： | 纤维素 [BMIM]HSO4/乙醇 固体残渣 热解行为 产物分布 |
| 收稿时间： | 2022/12/7 0:00:00 |
| 修稿时间： | 2023/2/12 0:00:00 |
Pyrolysis behaviors and products distribution of cellulose residue after depolymerized by [BMIM]HSO4/ethanol |
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| YANG Huamei,HUANG Yong,LUO Kai,CHEN Ziqin,LI Jing,LIU Yunfei,YANG Xiaoyici.Pyrolysis behaviors and products distribution of cellulose residue after depolymerized by [BMIM]HSO4/ethanol[J].Journal of Fuzhou University(Natural Science Edition),2023,51(6):865-871. |
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| Authors: | YANG Huamei HUANG Yong LUO Kai CHEN Ziqin LI Jing LIU Yunfei YANG Xiaoyici |
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| Abstract: | Solid residues (SRE) was prepared from microcrystalline cellulose conversion by a binary solvent system of 1-butyl-3-methylimidazole bisulfate (BMIM]HSO4) and ethanol at 180 oC, and the effect of BMIM]HSO4 mass concentration on the structural characteristics and pyrolysis process was investigated. Results of FTIR, Raman, XRD, SEM and laser particle size analyzer indicated that SRE maintained the chemical structure of cellulose. With the increase of the BMIM]HSO4 mass concentration, the particle size of SRE decreased significantly, and the crystal structure was constantly broken which transformed into thermally unstable amorphous structure. By thermogravimetric analyzer and tubular reactor, the experimental results showed that BMIM]HSO4 can effectively reduce the thermal stability of SRE, and reduce the initial temperature of thermal weight loss. The thermogravimetric process shifted to low temperature zone with the increase of the BMIM]HSO4 mass concentration. With the increase of mass concentration of BMIM]HSO4, the yield of char and gas increases, while the yield of bio-oil decreases, promoting the gas-solid interaction between volatile components and residues. D-allose content in bio-oil decreased with the increase of mass concentration of BMIM]HSO4, while contents of 5-hydroxymethyl furfural, furfural improved. Thus the increase of mass concentration of BMIM]HSO4 benefit the production of small molecular biomass based platform compounds such as furfural from SRE. |
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| Keywords: | cellulose [BMIM]HSO4/ethanol solid residue pyrolysis behavior products distribution |
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