Pyrolytic behavior and products of some wood varieties

Blasi, Colomba Di; Branca, Carmen; Santoro, A.; Hernandez, Elier Gonzalez

doi:10.1016/s0010-2180(00)00191-7

Cited by 219 publications

(222 citation statements)

References 24 publications

Supporting

Mentioning

200

Contrasting

Order By: Relevance

“…This study represent the first attempt to quantify, in terms of kinetic constants, these effects using chestnut which, following the results of previous experimental analyses 2,3 , report significant differences in the chemical composition and degradation characteristics with respect to standard hardwoods (i.e. beech).…”

Section: Discussionmentioning

confidence: 69%

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

Várhegyi

Grønli

Blasi

2004

Ind. Eng. Chem. Res.

Self Cite

103

View full text Add to dashboard Cite

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-

show abstract

Section: Discussionmentioning

confidence: 69%

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

Várhegyi

Grønli

Blasi

2004

Ind. Eng. Chem. Res.

Self Cite

103

View full text Add to dashboard Cite

show abstract

“…In the TGA experiment, the sample of hemicellulose powders is heated from 30 to 900 8C at heating rate of 3, 10, 20 and 80 K/min under the inert atmosphere. The mass of the sample is less than 5 mg to avoid the possible temperature gradient in the sample and to ensure the kinetic control of the process [25]. During the experiment the cell of TGA is flushed with 40 ml/min nitrogen to maintain an inert atmosphere for thermal decomposition of the sample.…”

Section: Tga-ftir Experimentsmentioning

confidence: 99%

Study on the pyrolytic behaviour of xylan-based hemicellulose using TG–FTIR and Py–GC–FTIR

Shen

Bridgwater

2010

Journal of Analytical and Applied Pyrolysis

488

226

View full text Add to dashboard Cite

“…Furthermore, hardwoods typically have higher densities compared to softwoods, and external factors like silviculture practices can alter density 44 . The main biomass constituent that favors char formation was found to be lignin 41 . This was confirmed by a Thermo Gravimetric Analyzer (TGA) (which in a sense, is a kind of carbonizer) kinetic study in which the highest charcoal yields (23% for spruce and 26.5% for redwood) were found in softwoods rather than in hardwoods 45 .…”

Section: Resultsmentioning

confidence: 99%

Charcoal “Mines” in the Norwegian Woods

et al. 2016

View full text Add to dashboard Cite

ABSTRACT:This paper reviews lab-scale flash carbonization experiments under elevated pressure using Norwegian wood as a feedstock. Norway's silicon and ferrosilicon industry has been urged to reduce fossil CO 2 emissions by increasing the use of charcoal as a substitute for coal and coke in the reduction process. As charcoal is not produced in Norway, large amounts of it are imported from South-Asia. Norway now intends to produce charcoal locally using optimum carbonization techniques from local biomass and forestry waste. That is where the pressurized flash carbonization experiments come in. Birch, spruce and forest residue or GROT samples (GRener Og Topper, i.e. branches and tops) were carbonized, enabling the analysis of the impact of pressure and FC canister insulation on their respective fixed carbon yields. Forest residue (FR) proved to be proper to make charcoal, as fixed carbon contents of 80% could be achieved at moderate pressures. The fixed carbon yields of spruce and birch wood reached over 90% of their theoretical values. The high charcoal yields can result in remarkable cost savings for the metallurgical industry, while at the same time making excessive deforestation unnecessary. The use of coal will soon be abandoned and charcoal 'mines' could become an obvious choice. 1.IntroductionBecause of the increasing demand for (Si-based) solar panels, for computer chips (following Moore's law) and for silicon for the massive metal production of countries like China 1 , the demand for silicon alloys and other ferroalloys has never been higher. The metal and alloy industry heavily depends on coal as a raw product. In electric arc furnaces, coal acts as a reductant and a carbon source, while in the older blast furnaces coal also acts as an energy source.These industries will not face raw silicon shortages, because over 25% of the earth's crust consists of this element, usually found in the form of silica SiO 2 . However, justifying the use of coal as a raw product in the manufacturing process of computer chips, photovoltaic panels and other metal commodities will pose a problem, especially with changing climate change policies.There are not many substitutes for coal, but charcoal is one. Charcoal has low ash and sulfur content compared to coal, while still maintaining high SiO reactivity, which makes charcoal

show abstract

Pyrolytic behavior and products of some wood varieties

Cited by 219 publications

References 24 publications

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

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

Study on the pyrolytic behaviour of xylan-based hemicellulose using TG–FTIR and Py–GC–FTIR

Charcoal “Mines” in the Norwegian Woods

Contact Info

Product

Resources

About