University of Trás-os-Montes and Alto Douro (UTAD), Forestry Department, Quinta dos Prados Apartado, 1013-5001-801 Vila Real, Portugal.
Bioresour Technol. 2010 Jun;101(11):3808-15. doi: 10.1016/j.biortech.2010.01.021. Epub 2010 Feb 1.
The gross calorific value (GCV), proximate, ultimate and chemical analysis of debark wood in Portugal were studied, for future utilization in wood pellets industry and the results compared with CEN/TS 14961. The relationship between GCV, ultimate and chemical analysis were determined by multiple regression stepwise backward. The treatment between hardwoods-softwoods did not result in significant statistical differences for proximate, ultimate and chemical analysis. Significant statistical differences were found in carbon for National (hardwoods-softwoods) and (National-tropical) hardwoods in volatile matter, fixed carbon, carbon and oxygen and also for chemical analysis in National (hardwoods-softwoods) for F and (National-tropical) hardwoods for Br. GCV was highly positively related to C (0.79 * * *) and negatively to O (-0.71 * * *). The final independent variables of the model were (C, O, S, Zn, Ni, Br) with R(2)=0.86; F=27.68 * * *. The hydrogen did not contribute statistically to the energy content.
对葡萄牙去皮木材的总热值（GCV）、近似值、极限值和化学分析进行了研究，以便将来在木屑颗粒行业中使用，并将结果与 CEN/TS 14961 进行了比较。通过逐步向后多元回归确定了 GCV、极限值和化学分析之间的关系。硬木-软木之间的处理在近似值、极限值和化学分析方面没有产生显著的统计学差异。在挥发物、固定碳、碳和氧方面，在国家（硬木-软木）和（国家-热带）硬木之间的碳以及在 F 方面在国家（硬木-软木）和 Br 方面在（国家-热带）硬木之间的化学分析方面发现了显著的统计学差异。GCV 与 C 呈高度正相关（0.79 ** **），与 O 呈负相关（-0.71 ** **）。模型的最终独立变量为（C、O、S、Zn、Ni、Br），R（2）=0.86；F=27.68 ** **。氢在能量含量方面没有统计学意义。
