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

Yu ki Yamamoto, Atsumi Miyake

Abstract

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.

Original languageEnglish
Pages (from-to)743-748
Number of pages6
JournalJournal of Thermal Analysis and Calorimetry
Volume127
Issue number1
DOIs
StatePublished - 2017 Jan 1

Fingerprint

Ionic liquids
Cellulose
Dissolution
Dimethyl sulfoxide
Organic solvents
Hazards
Exothermic reactions
Dimethylformamide
Differential scanning calorimetry
Biomass
Viscosity
Kinetics
Temperature

Keywords

  • 1-Butyl-3-methylimidazolium acetate
  • Cellulose solvent
  • Dimethyl sulfoxide
  • Ionic liquid
  • Thermal hazard

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

Cite this

Influence of a mixed solvent containing ionic liquids on the thermal hazard of the cellulose dissolution process. / Yamamoto, Yu ki; Miyake, Atsumi.

In: Journal of Thermal Analysis and Calorimetry, Vol. 127, No. 1, 01.01.2017, p. 743-748.

Research output: Contribution to journalArticle

Yamamoto, Yu ki; Miyake, Atsumi / Influence of a mixed solvent containing ionic liquids on the thermal hazard of the cellulose dissolution process.

In: Journal of Thermal Analysis and Calorimetry, Vol. 127, No. 1, 01.01.2017, p. 743-748.

Research output: Contribution to journalArticle

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N2 - 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.

AB - 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.

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