Topic
Sawdust
About: Sawdust is a research topic. Over the lifetime, 5526 publications have been published within this topic receiving 86499 citations. The topic is also known as: wood dust & hard wood dust.
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TL;DR: The FTIR analyses of lignin and holocellulose fractions, isolated after acidic hydrolysis of polysaccharides or delignification with sodium chlorite, indicate that both components are involved in the reactions.
Abstract: Chemical reactivity of heat-treated wood was compared with that of untreated wood. For this purpose, heat-treated pine or beech sawdust was reacted with different carboxylic acid anhydrides in pyridine or with phenyl isocyanate in dimethyl formamide. Compared to controls, weight gains obtained with heat-treated sawdust are smaller showing a lower chemical reactivity. FTIR analyses of lignin and holocellulose fractions, isolated after acidic hydrolysis of polysaccharides or delignification with sodium chlorite, indicate that both components are involved in the reactions. Compared to lignin, holocellulose exhibits important infrared absorptions of about 1,730 cm−1, characteristic of ester or urethane linkages formed. Lower reactivity of heat-treated sawdust is explained by the decrease in free reactive hydroxyl groups in holocellulose due to the thermal degradation of hemicelluloses, considered more reactive than cellulose.
114 citations
TL;DR: The catalysts recycling test of the selected catalysts indicated that the carbon catalysts can be reused for at least 3-4 times and produced high concentrations of phenol and phenolic compounds.
113 citations
TL;DR: In this article, a dilute solution of a basic dyestuff was decoloured by using hardwood sawdust as an adsorbent and the activation energy of the process was 9.83 kJ mol−1 which shows that the rate controlling step is intraparticle diffusion.
Abstract: Decolourisation of a dilute solution of a basic dyestuff was carried out by using hardwood sawdust as adsorbent. At 80°C 85% decolourisation occurred within 100 min at an initial concentration (Co) of 200 mg dm−3. There was a 44% reduction in contact time when the temperature was raised from 25 to 80°C. The rate parameter for different initial dye concentrations was found to follow the equation: kco=4.20Co0.88 and the rate parameter for different mean diameter dm followed the equation kdm=4.1 (l/dm)0.135. The activation energy of the process was 9.83 kJ mol−1 which shows that the rate controlling step is intraparticle diffusion.
113 citations
TL;DR: The white-rot fungi Ganoderma lucidum, Phanerochaete chrysosporium, Pleurotus ostreatus, P. pulmonarius and Trametes sp were used for biological pretreatment of Eucalyptus grandis sawdust as discussed by the authors.
113 citations
TL;DR: In this paper, fast pyrolysis of pinewood sawdust and two major components, namely lignin and cellulose, was carried out using a laboratory scale induction-heating reactor.
113 citations