Journal
BIORESOURCE TECHNOLOGY
Volume 274, Issue -, Pages 190-197Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2018.11.089
Keywords
Cellulose; Sorbitol; Bifunctional catalyst; Synergistic effect; Cassava dregs
Funding
- Science and Technology Program of Guangzhou [201607020025]
- Guangdong Natural Science Foundation [2016A030313489]
- State Key Laboratory of Pulp and Paper Engineering [2017PY01, 201829]
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The conversion of cellulose into sorbitol has been recognized as one of most promising biomass valorization routes for the production of high added-value chemicals. In this work, Sulfonic acid-functionalized carbonized cassava dregs supported ruthenium bifunctional catalyst (Ru/CCD-SO3H) was prepared. The Ru/CCD-SO3H catalyst was employed for direct conversion of cellulose into sorbitol in a neutral aqueous solution. A sorbitol yield of 63.8% could be obtained at 180 degrees C for 10 h. The acidic sites and metal hydrogenation sites of the Ru/CCD-SO3H catalyst played an important role in hydrolytic hydrogenation of cellulose. Particularly, there presented a strong synergistic effect between sulfonic groups and Ru nanoparticles in conversion of cellulose into sorbitol. This synergistic effect was favorable to enhancing the sorbitol yield. Besides, the stability of Ru/CCDSO3H catalyst was investigated under the optimal reaction conditions. The catalytic performance of catalyst was decreased after being used five times.
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