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- W2956593187 abstract "The changes in oxygen functionality of soluble portions and residues from the bagasse methanolysis (BM) and bagasse ethanolysis (BE) at 220, 240, 260, 280, and 300 °C were investigated. The highest yields of soluble portions, 40.8 wt% from BM and 48.1 wt% from BE, can be obtained at 280 °C for 0.5 h. The organic oxygen species evolution of the bagasse and residues were analyzed with Fourier transform infrared spectrometer, thermogravimetric analyzer, and X-ray photoelectron spectrometer. The results show that the contents of oxygen functional moieties between bagasse and residues are significantly different. The cleavage of >Cal-X bonds (X denotes Cal<, O-, N<, and/or S-), especially > Cal-Cal< and >Cal-O- bonds, should be the major reactions during the bagasse alkanolyses. In addition, based on the analysis with a gas chromatograph/mass spectrometer, oxygen-containing organic compounds produced from BM and BE can be divided into alkanols, alkenols, furans & tetrahydrofurans, alkyl-substituted phenols & benzenepolyols, methoxy-substituted benzenes, alkoxy-substituted phenols, benzaldehydes, ketones, esters, carboxylic acids, and other oxygenates. The depolymerization of cellulose and/or hemicellulose to pentose/hexose and/or other small-molecule products could facilitate the formation of cyclopentanones and cyclopent-2-enones. The comparison of the specific methyl and ethyl esters obtained from BM and BE, respectively, confirmed that the 4-hydroxyphenyl, 4-methoxyphenyl, guaiacyl, and/or syringyl units are likely present in the bagasse skeleton. Comparing the organic oxygen transformation during the bagasse alkanolyses will facilitate the utilization of oxygenated chemicals in the biomass-derived oils." @default.
- W2956593187 created "2019-07-23" @default.
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- W2956593187 date "2019-08-01" @default.
- W2956593187 modified "2023-09-23" @default.
- W2956593187 title "Changes in oxygen functionality of soluble portions and residues from bagasse sub- and supercritical alkanolyses: Identification of complex structural fragments" @default.
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- W2956593187 doi "https://doi.org/10.1016/j.biombioe.2019.105288" @default.
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