Calorific Value and Chemical Composition of Five Semi-Arid Mexican Tree Species
AbstractThe current global energy crisis has generated growing interest in looking for alternatives to traditional fossil fuels, presenting lignocellulosic materials as a promising resource for sustainable energy production. In this paper, the calorific values and chemical composition of the trunks, branches, twigs and leaves of five timber species of the semi-arid land of Mexico (Helietta parvifolia (Gray) Benth., Ebenopsis ebano (Berl.) Barneby, Acacia berlandieri (Benth.), Havardia pallens (Benth.) Britton & Rose and Acacia wrightii (Benth.)) were determined according to international standards. The results highlighted the calorific value ranges of 17.56 to 18.61 MJ kg−1 in trunks, 17.15 to 18.45 MJ kg−1 in branches, 17.29 to 17.92 MJ kg−1 in twigs, and 17.35to 19.36 MJ kg−1 in leaves. The pH presented an acidic trend (3.95–5.64). The content of mineral elements varied in trunks (1.09%–2.29%), branches (0.86%–2.75%), twigs (4.26%–6.76%) and leaves (5.77%–11.79%), showing the higher proportion in Ca (57.03%–95.53%), followed by K (0.95%–19.21%) and Mg (0.88%–13.47%). The highest amount of extractives was obtained in the methanolic solvent (3.96%–17.03%). The lignin recorded values of 28.78%–35.84% for trunks, 17.14%–31.39% for branches and 20.61%–29.92% for twigs. Lignin showed a moderately strong correlation (r = 0.66) with calorific value, but the best mathematical model was registered with the calorific value depending on the pH and lignin (R2 = 58.86%). View Full-Text
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Ngangyo-Heya, M.; Foroughbahchk-Pournavab, R.; Carrillo-Parra, A.; Rutiaga-Quiñones, J.G.; Zelinski, V.; Pintor-Ibarra, L.F. Calorific Value and Chemical Composition of Five Semi-Arid Mexican Tree Species. Forests 2016, 7, 58.
Ngangyo-Heya M, Foroughbahchk-Pournavab R, Carrillo-Parra A, Rutiaga-Quiñones JG, Zelinski V, Pintor-Ibarra LF. Calorific Value and Chemical Composition of Five Semi-Arid Mexican Tree Species. Forests. 2016; 7(3):58.Chicago/Turabian Style
Ngangyo-Heya, Maginot; Foroughbahchk-Pournavab, Rahim; Carrillo-Parra, Artemio; Rutiaga-Quiñones, José G.; Zelinski, Volker; Pintor-Ibarra, Luis F. 2016. "Calorific Value and Chemical Composition of Five Semi-Arid Mexican Tree Species." Forests 7, no. 3: 58.
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