2012
DOI: 10.1590/s0100-204x2012000500008
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Abstract: -The objective of this work was to characterize the morphology and molecular composition of the hydrochar produced by microwave-assisted hydrothermal carbonization of cellulose. The produced hydrochar consists mainly of aggregate microspheres with about 2.0 µm in diameter, with aliphatic and aromatic structures and the presence of carbonyl functional groups. The aromatic groups are formed mainly by benzofuran-like structures, being chemically different from common cellulose char. Microwave-assisted hydrotherma… Show more

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Cited by 26 publications
(5 citation statements)
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References 19 publications
(19 reference statements)
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“…On the basis of the hypothesis that the quality of hydrochar depends on the dissolved organic matter in the process water and vice versa, the identification of hydroxylated benzofurans confirms former findings, according to which these structures were found in the carbonaceous scaffold of hydrochar produced by HTC of glucose and cellulose as substrates.…”
Section: Resultssupporting
confidence: 80%
“…On the basis of the hypothesis that the quality of hydrochar depends on the dissolved organic matter in the process water and vice versa, the identification of hydroxylated benzofurans confirms former findings, according to which these structures were found in the carbonaceous scaffold of hydrochar produced by HTC of glucose and cellulose as substrates.…”
Section: Resultssupporting
confidence: 80%
“…A particular technology of hydrothermal treatment is microwave heating (Guiotoku et al, 2012). Mašek et al (2013a), mention as advantages of microwave heating over conventional heating the controllability and energy and cost efficiency of the process, since microwave heating at 200 °C can induce similar or even stronger chemical alterations than slow pyrolysis at 350 °C.…”
Section: A) Hydrothermal Processesmentioning
confidence: 99%
“…Catalytic hydrothermal biorefinery process is an efficient method to convert the renewable lignocellulosic biomass into liquid fuels and fine chemicals and has been widely studied during the past decades. During the catalytic hydrothermal biorefinery process, the polysaccharides in the biomass undergo hydrolysis to form monosaccharides such as glucose and xylose, which could be selectively converted to a series of valuable downstream platform chemicals such as furfural, 5-hydroxymethylfurfural (HMF), levulinic acid, , and lactic acid. , However, the formation of great amounts of byproducts during the hydrothermal degradation of carbohydrates, especially the solid hydrochar (HC) (or the so-called humins in some literature studies ), sharply decreases the yields of these desired platform chemicals. On the other hand, hydrothermal carbonization (HTC) is one efficient process to convert the biomass into solid HC, which could be used as a solid fuel , or novel carbon-based material precursor. , Therefore, the knowledge of the hydrothermal degradation routes of carbohydrate and the formation mechanism of HCs is an important foundation for both catalytic hydrothermal biorefinery process and HTC process.…”
Section: Introductionmentioning
confidence: 99%