Efficient hydrogenolysis of cellulose into sorbitol catalyzed by a bifunctional catalyst

A sulfonic acid-functionalized silica-supported ruthenium catalyst (Ru/SiO sub(2)-SO sub(3)H) was employed for the hydrogenolysis of cellulose in one pot in neutral water medium. Ru/SiO sub(2)-SO sub(3)H is a bifunctional catalyst containing both a Broensted acidic site and a metal site (Ru). Compar...

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Published in:Green chemistry : an international journal and green chemistry resource : GC 2014-01, Vol.16 (3), p.1534-1542
Main Authors: Zhu, Wenwen, Yang, Hanmin, Chen, Jizhong, Chen, Chen, Guo, Li, Gan, Huimei, Zhao, Xiuge, Hou, Zhenshan
Format: Article
Language:English
Subjects:
Catalysts
Cellulose
Hydrogenolysis
Nanoparticles
Silicon dioxide
Sorbitol
Sulfonic acid
X-ray photoelectron spectroscopy
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Summary:A sulfonic acid-functionalized silica-supported ruthenium catalyst (Ru/SiO sub(2)-SO sub(3)H) was employed for the hydrogenolysis of cellulose in one pot in neutral water medium. Ru/SiO sub(2)-SO sub(3)H is a bifunctional catalyst containing both a Broensted acidic site and a metal site (Ru). Compared with the mechanical mixture of a silica-supported Broensted acid (SiO sub(2)-SO sub(3)H) and a silica-supported Ru catalyst (Ru/SiO sub(2)), the bifunctional catalyst showed much higher yield of sorbitol, which could reach up to 61.2% when the reaction was performed for 10 h at 150 degree C. Through the characterization by XPS and pyridine-adsorbed FT-IR, the existence of the interaction between sulfonic groups and Ru nanoparticles in the Ru/SiO sub(2)-SO sub(3)H catalyst was observed. The sulfonic acid groups and metal sites in the adjacent position were important for enhancing the yield of sorbitol. In addition, the present catalyst can be reused five times with only a slight decrease in yield of sorbitol in the consecutive recycles.
ISSN:1463-9262
1463-9270
DOI:10.1039/c3gc41917g