Abstract In this paper we examined the effect of moisture on the solvent liquefaction of loblolly pine, cellulose, and lignin in tetralin at 280 °C and pressures ranging from 15 to 70 bar. Solvent liquefaction experiments were conducted in a quasi-batch reactor capable of continuous pressure control and external vapor condensation. Moisture was varied by the controlled addition of de-ionized water. Control over the system pressure subsequently impacted the removal of water vapor from the reactor. Liquid yield decreased by 25, 21, and 35 wt%, for pine, cellulose, and lignin, respectively, when moisture content was increased from 1 to 50 wt% at 42 bar. Humins were observed in the solid residue from liquefaction of wet cellulose. Wet lignin yielded a substantial amount of solid residue compared to dry lignin with a corresponding decrease in total phenolic monomer production. It was concluded that the ionic dissociation of water was an important factor in loss of liquid yield in the presence of water. Although water was less than 20 wt% of the solvent loading in these experiments, it strongly influenced the liquefaction of biomass and biomass components.

中文翻译：

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水分对松树、纤维素和木质素烃基溶剂液化的影响

摘要 在本文中，我们在 280 °C 和 15 至 70 bar 的压力下研究了水分对火炬松、纤维素和木质素在四氢化萘中的溶剂液化的影响。溶剂液化实验在能够连续压力控制和外部蒸汽冷凝的准间歇反应器中进行。通过受控添加去离子水来改变水分。对系统压力的控制随后影响从反应器中去除水蒸气。当水分含量在 42 巴下从 1 重量％增加到 50 重量％时，松树、纤维素和木质素的液体产率分别降低了 25、21 和 35 重量％。在湿纤维素液化的固体残留物中观察到腐殖质。与干木质素相比，湿木质素产生了大量的固体残留物，总酚类单体产量相应减少。结论是水的离子解离是在水存在下液体产率损失的重要因素。尽管在这些实验中水的溶剂负载量低于 20 wt%，但它强烈影响了生物质和生物质组分的液化。