Mn/ZSM-5 participation in the degradation of cellulose under phosphoric acid media |
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Authors: | Yang ChenGang Li Fang YangSong-Mei Zhang |
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Institution: | School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, PR China |
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Abstract: | The degradation reactions of cellulose under a combination of heterogeneous Fenton-like reagent with catalyst Mn/ZSM-5 and phosphoric acid media have been investigated. Phosphoric acid solution was selected as the reactive medium for the degradation of cellulose due to its good ability to destroy inter- and intra-molecular hydrogen bond so as to promote cellulose activation. The Fenton-like system, composing of H2O2 and Mn/ZSM-5 in combination with phosphoric acid, can effectively depolymerize cellulose to soluble sugars and partly degraded cellulose with much lower degree of polymerization. Small molecular products, 5-hydroxymethyl furfural and levulinic acid were extracted from the reaction solution. The performance of the catalyst Mn/ZSM-5 and the effect of reaction factors on the molar yield of 5-hydroxymethyl furfural were investigated. A three-step degradation scheme reflecting the main pathways of cellulose degradation in the reaction is proposed. |
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Keywords: | Cellulose degradation Fenton-like reagent Catalyst Mn/ZSM-5 Phosphoric acid |
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