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Molecules 2018, 23(3), 529; https://doi.org/10.3390/molecules23030529

Enhanced Hydrolysis of Cellulose in Ionic Liquid Using Mesoporous ZSM-5

1
CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Haixi Institutes, Chinese Academy of Sciences (CAS), Fuzhou 350002, China
2
College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China
*
Authors to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 25 January 2018 / Accepted: 30 January 2018 / Published: 27 February 2018
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Abstract

Mesoporous ZSM-5 prepared by alkaline treatment was demonstrated as an efficient catalyst for the cellulose hydrolysis in ionic liquid (IL), affording a high yield of reducing sugar. It was demonstrated that mesoporous ZSM-5 (SiO2/Al2O3 = 38) had 76.2% cellulose conversion and 49.6% yield of total reducing sugar (TRS). In comparison, the conventional ZSM-5 had a mere 41.3% cellulose conversion with 33.2% yield of TRS. The results indicated that the important role of mesopores in zeolites in elevating the TRS yield may be due to the diffusional alleviation of cellulose macromolecules. The effects of reaction time, temperature, and the ratio of catalyst to cellulose were investigated for optimal reaction conditions. It was found that IL could enter the inner channel of mesoporous ZSM-5 to promote the generation of H+ from Brönsted acid sites, which facilitated hydrolysis. Moreover, the mesoporous ZSM-5 showed excellent reusability for catalytic cycles by means of calcination of the used one, promising for its practical applications in the hydrolysis of cellulose. View Full-Text
Keywords: mesopores; zeolites; ZSM-5; cellulose; catalysis; hydrolysis; ionic liquids mesopores; zeolites; ZSM-5; cellulose; catalysis; hydrolysis; ionic liquids
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Chen, T.; Xiong, C.; Tao, Y. Enhanced Hydrolysis of Cellulose in Ionic Liquid Using Mesoporous ZSM-5. Molecules 2018, 23, 529.

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