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Cellulose depolymerization using zinc chloride hydrate and solid acid catalysts
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DOI：10.1007/s10570-024-06107-0.png)
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Abstract
En 中文
Increasing the efficiency of cellulose hydrolysis is a crucial milestone to enable its use as a platform for the production of renewable chemicals. Consequently, exploring alternative techniques for cellulose dissolution and subsequent depolymerization and hydrolysis remains a pivotal area of research. This study delves into the performance of diverse solid acid catalysts (ion-exchange resins, metal oxides, and zeolites) for cellulose depolymerization when combined with a concentrated solution of zinc chloride (ZnCl2) as the reaction medium and extractant. The influence of this molten salt hydrate on cellulose dissolution and the stability of the tested catalysts was thoroughly investigated. Optimal mild operating conditions (90 degrees C and 2 h) that facilitate enhanced conversion and selective glucose production were identified. The highest glucose yields (exceeding 40%) were obtained with Amberlyst-15 and HZSM-5 (SiO2/Al2O3 = 23), effectively mitigating product degradation and equaling or surpassing the traditional homogeneous system using H2SO4. Furthermore, insights into the deactivation mechanisms affecting the best catalysts are provided.
Keywords:
Cellulose hydrolysis
Molten salt hydrate
ZnCl2
Solid acid catalysts
Catalyst stability
Journal
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4.8
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8.4K
Citations:
3.4W
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