Abstract Softwood and organosolv lignin were pyrolized in a fluidized bed reactor. In each case, fractional condensation was achieved through two cyclonic condensers, maintained at different temperatures, and separated by an electrostatic precipitator. The produced oil was analyzed for liquid yield, water content, acidity, calorific value, carbon-hydrogen-nitrogen-oxygen content, viscosity, and rheology. To assess the effects of aging on the quality of the bio-oil, these tests were repeated after one-, two-, three- and nine- month intervals. The organosolv lignin is found to provide lower oil yields (30%) than softwood (50%). It is shown that higher carbon and lower oxygen content in the feedstock correlates to better bio-oil quality. Lignin, with a higher carbon and lower oxygen content than softwood, results in bio-oil with less water, lower acidity, higher heating values, and higher dynamic viscosities. Increasing the condensing temperature of the first condenser delays the condensation of water and light organics in the condensing train, affecting the properties of bio-oil, especially for the softwood. Tests on aging of the bio-oil demonstrate that viscosity is the only property significantly affected by the shelf life of the oil. Present data are favorably compared with available published data, for both feedstock types.

中文翻译：

---

软木和有机溶剂木质素热解油的分级缩合和老化

摘要 软木和有机溶剂木质素在流化床反应器中热解。在每种情况下，分级冷凝都是通过两个旋风冷凝器实现的，保持在不同的温度，并由静电除尘器分离。对采出的油进行液体收率、含水量、酸度、热值、碳-氢-氮-氧含量、粘度和流变学分析。为了评估老化对生物油质量的影响，在 1、2、3 和 9 个月的时间间隔后重复这些测试。发现有机溶剂木质素提供比软木 (50%) 更低的油产率 (30%)。结果表明，原料中较高的碳含量和较低的氧含量与更好的生物油质量相关。与软木相比，木质素具有更高的碳和更低的氧含量，因此可以生产出含水量更少的生物油，较低的酸度、较高的热值和较高的动态粘度。提高第一个冷凝器的冷凝温度会延迟冷凝系统中水和轻质有机物的冷凝，影响生物油的特性，尤其是软木。生物油老化测试表明，粘度是唯一受油保质期显着影响的特性。对于两种原料类型，目前的数据与可用的已公布数据相比是有利的。生物油老化测试表明，粘度是唯一受油保质期显着影响的特性。对于两种原料类型，目前的数据与可用的已公布数据相比是有利的。生物油老化测试表明，粘度是唯一受油保质期显着影响的特性。对于两种原料类型，目前的数据与可用的已公布数据相比是有利的。