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: In this paper, the effect of activation temperature on the textural parameters, acid-base character of the surface and sorption properties of activated carbons was analyzed and the results obtained in this study have proved that a suitable choice of the pyrolysis and activation procedure of sawdust can give adsorbents with high capacity of nitrogen dioxide, reaching to 54.7 and 28.8 µm NO2/g in dry and wet conditions, respectively and low capacity of hydrogen sulphide of 4.1 and 6.2 µm H2S/g, respectively
78 citations
TL;DR: The fluidized behavior of binary mixtures of moist sawdust and glass spheres has been investigated in this article, where the authors observed that the sawdust alone was observed to fluidize poorly, with extensive channelling occurring, and the addition of 0.322 and 0.516mm glass spheres to the fluidized bed of sawdust improved the fluidization characteristics.
78 citations
TL;DR: These N-doped carbons are highly suitable as cathode materials for Li-S batteries, showing high initial discharge capacities of up to 1300 mAh gsulfur -1 and capacity retention within the first 50 cycles at low electrolyte volume.
Abstract: Nitrogen-doped carbons were synthesized by a solvent-free mechanochemically induced one-pot synthesis by using renewable biomass waste. Three solid materials are used: sawdust as a carbon source, urea and/or melamine as a nitrogen source, and potassium carbonate as an activation agent. The resulting nitrogen-doped porous carbons offer a very high specific surface area of up to 3000 m2 g-1 and a large pore volume up to 2 cm3 g-1 . Also, a high nitrogen content of 4 wt % (urea only) up to 12 wt % (melamine only) is generated, depending on the nitrogen and carbon sources. The mechanochemical reaction and the impact of different wood components on the porosity and surface functionalities are investigated by nitrogen physisorption and high-resolution X-ray photoelectron spectroscopy (XPS). These N-doped carbons are highly suitable as cathode materials for Li-S batteries, showing high initial discharge capacities of up to 1300 mAh gsulfur-1 (95 % coulombic efficiency) and >75 % capacity retention within the first 50 cycles at low electrolyte volume.
78 citations
TL;DR: In this article, a systematic evaluation of sawdust and neem bark as low-cost natural adsorbent for removal of Pb(II) from aqueous solutions was carried out.
Abstract: This study reports a systematic evaluation of sawdust and neem bark as low-cost natural adsorbent for removal of Pb(II) from aqueous solutions. Studies were carried out to investigate the effect of pH, initial metal ion concentration, adsorbent dosage level, and equilibrium contact time for the adsorption process. The optimum pH for Pb(II) adsorption was found to be 5 and equilibrium was achieved within 1 h of contact time for both adsorbents. Maximum adsorption of the metal ion was obtained at an adsorbent dosage of 7.5 g/L, which may be considered as optimum adsorbent dosage level. At optimum conditions of pH, contact time and adsorbent dosage level removal efficiency of 94.5% ± 0.3% for Pb(II) adsorption was observed for sawdust, which was found to be 86.7% ± 0.5% for neem bark. Kinetics data were best described by pseudo-second-order model. Diffusion studies showed that the adsorption process is based on surface adsorption as well as intraparticle diffusion for both adsorbents. The equilibrium adsorption data were fitted well with Freundlich isotherm models. The sorption energy calculated from Dubinin-Radushkevich isotherm indicated that the adsorption process is chemical in nature. The maximum adsorption capacities (q max ) of sawdust and neem bark in terms of monolayer adsorption were compared with that reported in literature. The thermodynamic equilibrium constant and the Gibbs free energy were determined and the results indicated the spontaneous adsorption process. FTIR studies were carried out to understand the type of functional groups in sawdust and neem bark responsible for metal binding process.
78 citations
TL;DR: In this article, a composite material based on sawdust as reinforcing material and polyurethane foam as a binder agent, exhibiting sound absorbing proprieties, has been obtained and the sound absorption properties of the new obtained materials are directly correlated with the composition, the thickness of materials as well as the air gap samples and the rigid wall.
Abstract: New composite materials based on sawdust as reinforcing material and polyurethane foam as a binder agent, exhibiting sound absorbing proprieties, have been obtained. Due to the sound-absorbent proprieties exhibited by these type of materials, 11 new composite systems have been obtained varying the type and the size of sawdust particles, the percentage of binder and the thickness of material. The sound absorption properties of the new obtained materials are directly correlated with the composition, the thickness of materials as well as the air gap samples and the rigid wall. In addition, the morphological and thermal conductivity proprieties and the mechanical ones, of the new obtained materials, were carried out.
78 citations