dissolution of microcrystalline cellulose in phosphoric acid—molecular changes and kinetics
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ID: 129642
2009
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Abstract
In this study, we aimed to dissolve microcrystalline cellulose (MCC) with phosphoric acid to obtain high-quality fermentable saccharides. MCC was directly dissolved in phosphoric acid (the concentration was 83%) for 10 hours at temperatures of 30, 50, and 70 °C. The structural changes of MCC were determined in detail with X-ray powder diffraction, solid-state cross-polarization magic angle spinning 13C-NMR, and X-ray photoelectron spectroscopy. The kinetics of MCC decrystallization during treatment with phosphoric acid was also compared at 30, 50, and 70 °C. With the assumption of first order kinetics, the Arrhenius parameters of K, A0 and Ea were calculated. The rate constants of decrystallization reaction (K) were 0.06, 0.17, and 0.12 h-1 respectively. The pre-exponential factor (A0) was 1.2 × 106 h-1, and the activation energy (Ea) was 42.4 kJ/mol.
| Reference Key |
ouyang2009moleculesdissolution
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|---|---|
| Authors | ;Pingkai Ouyang;Zhenjiang Li;Shijie Liu;Jun Zhang;Tianming Chen;Lu Lin;Junhua Zhang;Jingqiang Zhang |
| Journal | Journal of ethnopharmacology |
| Year | 2009 |
| DOI |
10.3390/molecules14125027
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