Influence of a mixed solvent containing ionic liquids on the thermal hazard of the cellulose dissolution process

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• 作者：Yu-ki Yamamoto ; Atsumi Miyake
• 关键词：Ionic liquid ; Thermal hazard ; 1 ; Butyl ; 3 ; methylimidazolium acetate ; Dimethyl sulfoxide ; Cellulose solvent
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：127
• 期：1
• 页码：743-748
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Physical Chemistry; Analytical Chemistry; Polymer Sciences; Inorganic Chemistry; Measurement Science and Instrumentation;
• 出版者：Springer Netherlands
• ISSN：1588-2926
• 卷排序：127

文摘

Ionic liquids (ILs) can act as high-performance solvents for cellulose in biomass conversion processes. However, the increase in viscosity that occurs upon dissolution of the cellulose in ILs can cause problems. To overcome this problem, ILs can be mixed with an organic solvent. This study investigates the thermal risk of the cellulose dissolution process using mixed solvents, ILs, and organic solvents. Sealed-cell differential scanning calorimetry (SC-DSC) was conducted on mixtures of 1-butyl-3-methylimidazolium acetate (BmimAc) and three aprotic polar solvents [dimethyl sulfoxide (DMSO), dimethyl acetamide (DMAc), and N,N-dimethylformamide (DMF)] to investigate thermal hazards. In addition, for samples exhibiting exothermal behavior greater than 100 J g−1, a prediction of runaway reaction behavior was obtained using kinetic analysis. Results revealed that BmimAc/DMSO could undergo a violent exothermic reaction, with a risk of a runaway reaction depending on the process temperature.