2004
DOI: 10.1021/ie034168f
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Effects of Sample Origin, Extraction, and Hot-Water Washing on the Devolatilization Kinetics of Chestnut Wood

Abstract: Várhegyi et al., Effects of sample origin, extraction and hot water washing on devolatilization kinetics, Page 1 of 26 ABSTRACTThe variations in chemical composition and the effects of sample origin and pre-treatments represent a major problem in the kinetic modeling of wood pyrolysis. This study aims to a deeper understanding of these issues by examining a species, chestnut (Castanea sativa), that contains a higher amount of extractives than the common forest hardwoods of the temperate zone. Thermogravimetri… Show more

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Cited by 103 publications
(105 citation statements)
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“…Furthermore, under inert atmosphere, a delay in the pyrolysis of the washed fiber is observed, both at the stage associated with NCP (approximately 13 °C higher in the washed fiber) and cellulose decomposition (between 2 to 4 °C in the washed fiber) ( Table 2). These results agree with those found in other studies on washed lignocellulosic material [9,57]. Moreover, washed sisal presents the combustion stage slightly delayed with respect to the natural fiber (Fig.…”
Section: Effect Of the Hot-washing Treatment On The Thermal Decomposisupporting
confidence: 93%
See 1 more Smart Citation
“…Furthermore, under inert atmosphere, a delay in the pyrolysis of the washed fiber is observed, both at the stage associated with NCP (approximately 13 °C higher in the washed fiber) and cellulose decomposition (between 2 to 4 °C in the washed fiber) ( Table 2). These results agree with those found in other studies on washed lignocellulosic material [9,57]. Moreover, washed sisal presents the combustion stage slightly delayed with respect to the natural fiber (Fig.…”
Section: Effect Of the Hot-washing Treatment On The Thermal Decomposisupporting
confidence: 93%
“…The influence of extractives and mineral matter on thermal decomposition of different lignocellulosic materials has been studied extensively [9][10][11]. Water washing is a simple and economical pretreatment, which has been used to remove alkali metals from biomass, to avoid the toxicity of mists generated by the combustion of biomass, so preventing accumulation problems (deposition, corrosion, erosion, etc.)…”
Section: Introductionmentioning
confidence: 99%
“…To distinguish between the catalytic effect of the different alkali ion contents and the structural changes due to the steam explosion, we prepared hot water washed samples for comparison since hot water washing for 2 hours removes the majority of the alkali ions [44,45]. Table 2 shows the yields of volatiles and carbonaceous residues (chars) at 850 °C, the ash, sodium and potassium ion contents as well as the sulfur content of the untreated, washed and steam exploded biomass samples.…”
Section: Characterization Of the Samplesmentioning
confidence: 99%
“…Numerous kinetic calculations can be found in the literature for the thermogravimetric experiments of biomass samples with very diverse results [28][29][30][31][32][33][34]. The kinetic models generally assume that the isothermal gas or liquid phase models can be applied for the dynamic experiments.…”
Section: Reaction Kinetic Modeling Using Thermogravimetric Datamentioning
confidence: 99%
“…It is frequently supposed in the kinetic models that the thermal decomposition of the biomass components takes place independently from each other. The three-component mechanism with linear or nonlinear dependence on the species concentrations, for the volatile fractions of the pseudocomponents hemicellulose, cellulose and lignin, is widely applied [28][29][30][31][32][33] to describe the dynamic thermogravimetric curves of wood/biomass devolatilization. The first pseudocomponent is associated with the shoulder and the second one with the peak of the DTG curve, whereas the lignin pseudo-component decomposes slowly over a very broad range of temperatures.…”
Section: Reaction Kinetic Modeling Using Thermogravimetric Datamentioning
confidence: 99%