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Properties of solid biofuels obtained from residues of wood-based materials

Walkowiak M., Witczak M., Sajdak M., Cichy W. J.

Drewno : prace naukowe, doniesienia, komunikaty

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2018

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vol. 61, nr 202

99--118

EN

Processing of wood and composite wood materials contributes to the creation of considerable amounts of production residues. These materials are potential energy sources. However, the content of synthetic substances (including binding and finishing agents) may cause the emission of harmful substances during the thermal destruction of such materials. Therefore, to derive benefit from waste from wood-based materials, it is necessary to obtain information on its physical and chemical properties (especially its fuel properties). Hitherto, literature reports say little of those properties. The aim of this study was to determine the basic fuel properties of residues from the industrial processing of composite wood materials (such as particleboards, fibreboards and plywood) and to assess their suitability for biofuel production. Four groups of wood-based materials were tested:. particleboards (standard boards and OSBs), fibreboards (MDF, HDF, CDF and SB), layer materials (plywood and LVL), and wood materials being a combination of the other groups (double T-bars). The total moisture content, ash content, elementary composition (C, H, N, S, Cl), trace element content (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) and gross calorific value were determined, and the net calorific value was calculated. The results showed that the tested wood materials had favourable fuel properties and could be used in place of raw wood as an energy source.

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Combustion of fuel blends derived from lignocellulosic materials and peat in a small power combustion chamber

Cichy W. J.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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No. 87

40--44

EN

The paper presents the results of research on obtaining fuels derived from plant biomass that will be able to replace traditional fossil fuels. The aim of the study was to investigate the effect of co-firing different types of woody biomass with peat in a small power combustion chamber. Sawdust from conifers, wood chips from willow, postconsumer wood ("old furniture"), peat and fuels derived from woody materials mixed with peat in a 1:1 ratio were tested. It has been found that the combustion of fuel blends involving different types of woody biomass and peat resulted in a reduction of adverse effects observed during the combustion of pure peat (low amount of carbon-monoxide in the exhaust gases). In the case of solid biofuels from chemically treated biomass (old furniture), the share of peat in the fuel blends caused a decrease in the content of nitrogen oxides in the exhaust gases in comparison to fuels containing 100% "old furniture".

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Assessment of mechanical properties of pellets made from wood raw materials

Cichy W. J., Panek A., Radoński D.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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No. 87

35--39

EN

The article presents the results of determinations of selected physical properties of wood pellets produced by industrial manufacturers. Compared some physical properties of solid biofuels assessed (moisture content, length and particle density) and rated their impact on bulk density and mechanical durability of pellets. Stated a significant effect of unit density pellets on bulk density and little effect of unit density pellets and length on mechanical durability of pellets. Changes in moisture content as received in the range of 6-9% did not influence of the mechanical durability of pellets.