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Catalytic Conversion of Cellulose into 5-Hydroxymethylfurfural Using [PSMIM]HSO4 and ZnSO4·7H2O Co-catalyst in Biphasic System
- Xuan, Yongli, He, Rong, Han, Bin, Wu, Tinghua, Wu, Ying
- Waste and biomass valorization 2018 v.9 no.3 pp. 401-408
- catalysts, cellulose, hydroxymethylfurfural, temperature, tetrahydrofuran, zinc sulfate
- Production of 5-hydroxymethylfurfural (HMF) from microcrystalline cellulose (MCC) was studied in 1-(3-sulfonic acid)-propyl-3-methylimidazolium hydrogen sulfate ([PSMIM]HSO₄)–H₂O/THF biphasic system with catalytic amount of ZnSO₄·7H₂O. The effects of various reaction parameters such as catalyst charge, reaction temperature and the volume ratio of water to tetrahydrofuran were investigated. The highest HMF yield of 58.8 % and TRS yield of 64.8 % were obtained at 160 °C for only 60 min by [PSMIM]HSO₄ and ZnSO₄·7H₂O as co-catalyst. A possible mechanism was proposed to explain the high activity of [PSMIM]HSO₄ and ZnSO₄·7H₂O as co-catalyst. After being separated from the organic phase, the aqueous phase could be reused and demonstrated stable activity after four successive runs.