Woody and Herbaceous Biomass Feeds — How Can We Study Their Composition and Their Pyrolysis Products?

Krieger-Brockett, Barbara; Rodriguez, Indalesio

doi:10.1002/9780470694954.ch82

Cited by 1 publication

(2 citation statements)

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“…In the former case, some sugars and phenolic compounds are also eliminated 28 whereas, in the latter case, the loss of some inorganic matter has to be considered. 29 Moreover, it can be expected that, in the case of hot-water treatment, hydrolysis of some organic compounds takes place at a certain extent. All these factors highly affect the products and degradation rate of the lignocellulosic fuels.…”

Section: Resultsmentioning

confidence: 99%

“…Hot-water washing and acetone extraction mainly remove inorganics and extractives, respectively. In the former case, some sugars and phenolic compounds are also eliminated whereas, in the latter case, the loss of some inorganic matter has to be considered . Moreover, it can be expected that, in the case of hot-water treatment, hydrolysis of some organic compounds takes place at a certain extent.…”

Section: Resultsmentioning

confidence: 99%

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Effects of Sample Origin, Extraction, and Hot-Water Washing on the Devolatilization Kinetics of Chestnut Wood

Várhegyi

Grønli

Blasi

2004

Ind. Eng. Chem. Res.

103

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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. Thermogravimetric and kinetic analysis were carried out on five chestnut samples obtained from plants grown in France, Italy and Russia. The results were compared to that of a widely used and investigated species (beech) belonging to the same plant family. Degradation takes place over a narrower range and at lower temperatures, giving higher yields of char. In all cases, hot water washing causes a decrease in the fixed carbon content and char yield, an increase in the peak rate, a better separation between pseudo-component dynamics and a displacement of the reaction zones toward higher temperatures. Though with some scatter and quantitatively lower, the same effects are also observed as a consequence of acetone extraction. Both pre-treatments act to reduce the differences between chestnut samples and with beech, but peculiarities due to origin and species are preserved. The three parallel reaction curves evaluations, resulting in kinetic data specific to sample origin, except for the activation energy of the lignin devolatilization step. Kinetic parameters also indicate that the lower char yields, associated with pre-

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%