Analysis of the Inorganic Matter in Wood and Bark Proceeding from the Energetic Woodchips of the Plantation Grown Tree Species Robinia pseudoacacia via the AES-ICP

Abstract:

The paper presents the results of a quantitative analysis of the proportion of the following chemical elements: Ca, Mg, K, P, Mn, Zn and Fe in wood, bark and energetic woodchips produced from woody biomass of plantation grown clones: Ambiqua, Gori, Nyírségi, Rozaszin of the tree species Robinia pseudoacacia, which were cultivated by midi-rotation. Experimental works determined the average density of black locust wood ρ_0W = 680.8 kg m^-3 and of its bark ρ_0B = 764.4 kg m^-3. The AES-ICP technique determined the proportion of individual inorganic elements in dry wood and dry bark. The analyses show that the proportion of the analyzed inorganic elements in bark is 3.49 times higher than the proportion of these elements in wood. The largest proportion in the woody bark belongs to calcium, which proportion in wood is Ca = 3 965 mg.kg^-1 and in bark is Ca = 18 698 mg.kg ^-1. Potassium shows also a higher proportion in bark than in wood with a value of K = 4 796 mg.kg^-1, which is 1.73 times higher than in wood, Mg = 1 284 mg.kg^-1, which is 2.81 times higher, phosphorus with the value P = 2 403 mg.kg^-1, which is 4.04 times higher and iron Fe = 574 mg.kg^-1 which is 4.86 times higher than in wood. Proportion of the analyses in energy woodchips is comparable to the proportion of these elements in the energy woodchips made of woody biomass produced from plantation grown clones of willow and alder. Woodchips made of black locust contain a higher proportion of calcium, it is by 25% higher than the upper limit of calcium in woody biomass from plantation grown poplar trees.

• Periodical: Key Engineering Materials (Volume 688)
• Pages: 218-225
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.688.218
• Online since: April 2016
• Authors: Ladislav Dzurenda*, Ľubomir Pňakovič
• Keywords: Bark, Biofuel, Inorganic Matter (Minerals), Robinia Pseudoacacia, Wood

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