Hydrothermal liquefaction of barley straw to bio-crude oil: Effects of reaction temperature and aqueous phase recirculation
Hydrothermal liquefaction of barley straw to bio-crude oil: Effects of reaction temperature and aqueous phase recirculation
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大麦秸秆水热液化制生物原油：反应温度和水相再循环的影响
DOI：
10.1016/j.apenergy.2014.10.005
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发表时间：
2015
期刊：
影响因子：
11.2
通讯作者：
Guanyi Chen
中科院分区：
文献类型：
--
作者：
Zhe Zhu;Lasse Rosendahl;Saqib Sohail Toor;Donghong Yu;Guanyi Chen
在不同温度（280-400°C）下用K2CO3对大麦秸秆进行水热液化（HTL）并进行比较，以优化其工艺条件；该工艺的副产品水相被回收，以探讨废水回用用于生物原油生产的可行性。结果表明，低温有利于生物原油的形成，在 300 °C 时产量最高可达 34.9 wt%。相反，在高温下，生物原油具有较低的氧含量和较高的热值（HHV）的更好品质。生物原油中鉴定出的化合物主要为酚类、羧酸类、醛类和醇类，其中酚类和羧酸类的相对含量随温度升高而降低。在再循环研究中，通过在 300 °C 下添加水相，生物原油收率逐渐提高，并在三个循环后达到 38.4 wt%。水相 HTL 生产的生物原油的 HHV 为 28.4–29.4 MJ/kg，略高于淡水 HTL 生产的生物原油。而水相再循环后元素分布没有发现明显差异。总之，本研究详细了解了大麦秸秆的 HTL 行为，并为通过水相再利用生产生物原油提供了潜在的机会和效益。
Hydrothermal liquefaction (HTL) of barley straw with K2CO3at different temperatures (280–400 °C) was conducted and compared to optimize its process conditions; the aqueous phase as a co-product from this process was recycled to explore the feasibility of implementing wastewater reuse for bio-crude oil production. Results showed that low temperature favored the formation of bio-crude oil, with a maximum yield of 34.9 wt% at 300 °C. Contrarily, at high temperature, the bio-crude oil had better qualities in terms of less oxygen content and higher heating values (HHVs). The compounds identified in bio-crude oil were mainly phenolics, carboxylic acids, aldehydes and alcohols, among which the relative contents of phenolics and carboxylic acids decreased with increasing temperature. In the recirculation studies, bio-crude yield was enhanced gradually with aqueous phase addition at 300 °C, and reached 38.4 wt% after three cycles. The HHVs of bio-crude oil from HTL with aqueous phase were 28.4–29.4 MJ/kg, slightly higher than those from HTL with fresh water. While no obvious differences in elemental distribution can be found after aqueous phase recirculation. In conclusion, this study gives a detailed insight into the HTL behavior of barley straw, and offers potential opportunities and benefits for bio-crude oil production through the reuse of aqueous phase.
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影响因子：
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作者：
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