Influence of potassium carbonate addition on the condensable species released during wood torrefaction

Autor: Mathieu Pétrissans, Jérémy Valette, Lucélia Alves de Macedo, Patrick Rousset, Jean-Michel Commandre
Přispěvatelé: Serviço Florestal Brasileiro, BioWooEB (UPR BioWooEB), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Université de Lorraine (UL), Institut National de la Recherche Agronomique (INRA), King Mongkut’s University of Technology Thonburi [Bangkok], National Council for Technological and Scientific Development (CNPq, Brazil) grant No. 248443/2013-5, BioWooEB (Cirad-Persyst-UPR 114 BioWooEB), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
K50 - Technologie des produits forestiers
bois
Carbonate
P06 - Sources d'énergie renouvelable
composition chimique
General Chemical Engineering
Potassium
Syringol
bois retifie
02 engineering and technology
[SPI.MAT]Engineering Sciences [physics]/Materials
Potassium carbonate
chemistry.chemical_compound
pyruvic acid
0202 electrical engineering
electronic engineering
information engineering
Lignin
Organic chemistry
Lignin derivatives
vinegar
Chemistry
Levoglucosan
potassium
Thermogravimetric analysis
Glucane
lignine
6. Clean water
Fuel Technology
acide pyruvique
timber
020209 energy
Energy Engineering and Power Technology
chemistry.chemical_element
lignin
Biocarburant
020401 chemical engineering
0204 chemical engineering
Cellulose
HMF
Bioréacteur
Chromatographie en phase gazeuse
Torréfaction
analyse thermogravimétrique
Torrefaction
Température
anhydride
acide acétique
torrefaction
13. Climate action
chemical analysis
Bioénergie
Guaiacol
Nuclear chemistry
Gravimétrie
Zdroj: Fuel Processing Technology
Fuel Processing Technology, Elsevier, 2018, 169, pp.248-257. ⟨10.1016/j.fuproc.2017.10.012⟩
ISSN: 0378-3820
1873-7188
DOI: 10.1016/j.fuproc.2017.10.012⟩
Popis: In order to investigate the effect of potassium addition on the composition of torrefaction condensates, two demineralized wood species were impregnated with different concentrations of K2CO3 and then torrefied at 275 °C up to an anhydrous weight loss (AWL) of 25%. Torrefaction was carried out in both a thermogravimetric analysis (TGA) instrument and a laboratory fixed-bed reactor. Condensates from the fixed bed reactor were collected and analyzed by Gas Chromatography-Mass Spectroscopy (GC–MS). TGA of raw and K2CO3-impregnated biopolymers (cellulose, xylan and lignin) were performed to facilitate interpretation of the results. TGA showed that when potassium content increased in the biomass, shorter torrefaction times were sufficient to obtain the targeted AWL. GC–MS showed, for both wood species, that potassium promotes the formation of acetol and slightly enhances acetic acid yield. The amount of some lignin derivatives (guaiacol, syringol, 4-vinylguaiacol) also rose with potassium addition. Yields of levoglucosan, LAC (1-hydroxy-(1R)-3,6-dioxabicyclo[3.2.1]octan-2-one) and DGP (1,4:3,6-dianhydro-α-d-glucopyranose), as well as furfural and 5-hydroxymethylfurfural, decreased drastically in the presence of potassium. In conclusion, small additions of potassium carbonate deeply affected thermal degradation of wood species and the speciation of torrefaction condensates. (Resume d'auteur)
Databáze: OpenAIRE
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