STABILITY OF WOOD FAST PYROLYSIS OIL
STABILITY OF WOOD FAST PYROLYSIS OIL
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DOI：
10.1016/0961-9534(94)00058-2
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发表时间：
1994-01-01
影响因子：
6
通讯作者：
BLACK, S
中科院分区：
文献类型：
--
作者：
CZERNIK, S;JOHNSON, DK;BLACK, S
本研究评价了长期高温下储存条件对生物质快速裂解油物理化学性质的影响。对NREL涡流反应器产生的橡木热解油进行了热解实验。油样在三种温度下储存在玻璃容器中：37摄氏度、60摄氏度和90摄氏度。这些油在90摄氏度下储存数小时后，在较低温度下储存数天或数周后，测量其性质。用分子量分布(GPC)和傅里叶变换红外光谱(FTIR)测定了油的化学变化。在研究的整个条件下，油保持单一相。其pH值不受贮藏条件的影响。油的含水率、粘度和相对分子质量均随储存时间和温度的升高而增加。一级反应动力学被成功地用来预测储存油的相对分子质量的变化。FTIR提供的证据表明，醚化或酯化是油脂在储存过程中发生冷凝的机制。
This study evaluates the effects of storage conditions on physical and chemical properties of biomass fast pyrolysis oils exposed to elevated temperatures over extended periods of time. It was performed on oak pyrolysis oil generated in the NREL vortex reactor. Oil samples were stored at three temperatures: 37, 60 and 90 degrees C in glass vessels. Properties of the oils were measured after hours of storage at 90 degrees C, and after days or weeks at lower temperatures. Chemical changes in the oils were measured using GPC (molecular weight distribution) and FTIR spectroscopy. The oil remained a single phase throughout the studied conditions. its pH was not affected by storage. The water content, viscosity and molecular weight of the oil increased with the time and temperature of storage. First-order reaction kinetics were successfully used to predict changes in molecular weight of the stored oil. FTIR provided evidence that etherification or esterification are mechanisms for condensation of the oil during storage.