In this study, materials from stem, branches and bark of three native forest species from the Mediterranean region – Turkish pine (Pinus brutia Ten.), black pine (Pinus nigra L.), and black locust (Robinia pseudoacacia L.) – were harvested from marginal lands in north Greece, and were thoroughly characterized on the basis of their physical properties, combustion characteristics, chemical composition, and ash elemental analysis. The potential of these fast-growing, drought-tolerant species to function as sustainable feedstock for solid biofuel production has been proven to be high, with black pine showing the strongest potential. The materials, especially stems and branches, presented low moisture and ash content, and high calorific value attributed to high lignin content, in comparison with species grown on conventional lands. The ashes, being produced from processed materials, mainly consist of Ca, K, S, and P as major elements, while their toxic element contents are negligible, increasing the potential for the ash to be utilized in fertilization. © 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd.

中文翻译：

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提供树木作物生物质作为固体生物燃料原料的边际土地

在这项研究中，来自地中海地区的三种原生森林物种——土耳其松 ( Pinus brutia Ten.)、黑松 ( Pinus nigra L.) 和刺槐 ( Robinia pseudoacacia ) 的茎、枝和树皮材料L.) – 采自希腊北部的边缘土地，并根据其物理特性、燃烧特性、化学成分和灰分元素分析进行​​彻底表征。这些快速生长、耐旱的物种作为固体生物燃料生产的可持续原料的潜力已被证明是很高的，其中黑松表现出最强的潜力。与传统土地上生长的物种相比，这些材料，尤其是茎和树枝，水分和灰分含量低，热值高，这归因于高木质素含量。由加工材料制成的灰分主要由Ca、K、S和P作为主要元素组成，而它们的有毒元素含量可以忽略不计，增加了灰分用于施肥的潜力。