Abstract Pyrolysis oil produced from forestry residues is used as a low-grade fuel in applications such as heating oil. However, the high water and acid content can lead to fuel instability, phase separation, poor lubrication, and corrosion. In this work, pervaporation has been studied as a process to simultaneously upgrade a pyrolysis oil produced from Canadian softwood bark to meet a boiler fuel standard and extract value-added chemicals. Commercial polyacrylonitrile-supported polyvinyl alcohol membranes from DeltaMem AG were used at temperatures of 60 and 80 °C to separate water and volatile organic components, including methanol, acetic acid, and acetol. A design of experiment study was used to define the range of operating conditions. A temperature of 80 °C and a low feed flow rate of 0.1 mL min−1 resulted in the highest quality oil. The upgraded pyrolysis oil (pervaporation retentate) showed an increased heating value from incomplete combustion to 16.07 MJ kg−1 and the water content was lowered from 70.2 wt% in the feedstock to 21.4 wt%, demonstrating the potential for this process on a larger scale.

中文翻译：

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通过渗透蒸发改进树皮热解油和增值化学品回收

摘要 从林业残留物中生产的热解油在取暖油等应用中用作低等级燃料。然而，高水和酸含量会导致燃料不稳定、相分离、润滑不良和腐蚀。在这项工作中，渗透蒸发被研究为一种同时升级从加拿大软木树皮生产的热解油以满足锅炉燃料标准并提取增值化学品的过程。DeltaMem AG 的商用聚丙烯腈负载聚乙烯醇膜用于在 60 和 80 °C 的温度下分离水和挥发性有机成分，包括甲醇、乙酸和丙酮醇。实验研究设计用于定义操作条件的范围。80 °C 的温度和 0.1 mL min-1 的低进料流速产生了最高质量的油。