When stored in closed environments, wood pellets consume and react with atmospheric oxygen in oxidative reactions. These reactions result in the loss of dry matter and the release of oxidative heat. To measure the oxygen consumption, pellets with moisture content (m.c.) between 4 and 50% (wb) were stored in sealed jars for 10 days at 25, 40, and 60 °C. Air was drawn from the jar using a syringe. The oxygen concentration of the extracted air was determined using gas chromatography. Assuming a complete oxidative reaction, 43.2 mmol or 1.057 L of oxygen gas is required to convert 1 g of wood under room conditions. Pellets stored at 25 °C had a rate of dry matter loss between 0.002 and 0.005%/day. The rate of dry matter loss more than doubled when pellets were stored at 40 °C. Pellets with 35% m.c. stored at 60 °C had the highest rate of dry matter loss of 0.036%/day. The oxidative heat rate ranged from 1 μW/g at 10 °C to 84 μW/g at 60 °C for 35% m.c. (wet mass basis) sample. When compared to published dml data of wood chips, wood pellets had higher dml rates at moisture contents lower than 10% but were more stable at higher moisture contents. Our results may be applied to estimate dry matter loss and oxidative heat in stored pellets without extensive analytical devices.

当储存在封闭环境中时，木屑颗粒会在氧化反应中消耗大气中的氧气并与之发生反应。这些反应导致干物质的损失和氧化热的释放。为测量耗氧量，将水分含量 ( mc ) 介于 4% 和 50% (wb) 之间的颗粒在 25、40 和 60 °C 的密封罐中储存 10 天。使用注射器从广口瓶中抽出空气。使用气相色谱法测定抽取空气中的氧气浓度。假设一个完全的氧化反应，在室内条件下转化 1 克木材需要 43.2 毫摩尔或 1.057 升氧气。在 25 °C 下储存的颗粒的干物质损失率为 0.002 至 0.005%/天。当颗粒在 40 °C 下储存时，干物质损失率增加了一倍以上。含 35% mc的颗粒在 60 °C 下储存的干物质损失率最高，为 0.036%/天。对于 35% mc，氧化热速率范围从 10 °C 时的 1 μW/g 到 60 °C 时的 84 μW/g 。（湿质量基础）样品。与公布的木屑 dml 数据相比，木颗粒在水分含量低于 10% 时具有更高的 dml 率，但在较高水分含量时更稳定。我们的结果可用于估算储存颗粒中的干物质损失和氧化热，而无需大量分析设备。