Uriah Kilgore, Emily Diaz, Ben Spry, Yuan Jiang, Shuyun Li, Andrew Schmidt and Michael R. Thorson
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引用次数: 0
摘要
水热液化(HTL)是一种能够利用湿废物生产可持续碳氢化合物燃料的技术,同时还能减少废物量。然而,通过热液化技术生产可持续燃料的规模尚未达到商业化水平,改进工艺安全性的机会依然存在。本研究介绍了利用石脑油系列碳氢化合物对 HTL 产品进行低压、低温、两级溶剂萃取和分离的方法。沥青和生物原油(BC)在石蜡与石脑油或芳烃溶剂成分方面具有相似的定性溶解行为,这使我们能够研究与沥青溶剂加工类似的工艺。我们进行了实验室规模的实验,以演示基本工艺并评估关键参数。实验室工作表明,在 80 °C 温度下使用脂肪族/芳香族溶剂混合物,可从产品混合物中回收近 100% 的生物原油,同时降低碳氢化合物的含量。研究结果表明了溶剂萃取在高温液化生物原油加工中的潜力。在商业规模上,这种工艺可以降低高温热解工艺的风险,改善商业化前景,为通过高温热解工艺将湿废物和废弃生物质广泛转化为可持续燃料打开大门。
Solvent processing for improved separation of hydrothermal liquefaction products†
Hydrothermal liquefaction (HTL) is a technology capable of producing sustainable hydrocarbon fuels from wet waste, reducing volumes of that waste as an added benefit. However, sustainable fuel production through HTL has yet to reach commercial scale and opportunities for improvements to process safety remain. This work describes low-pressure, low-temperature, two-stage solvent extraction and separation of HTL products utilizing naphtha range hydrocarbons. The similar qualitative solubility behavior of bitumen and biocrude (BC) with respect to paraffin versus naphthene or aromatic solvent composition allows us to examine a process comparable to solvent processing of bitumen. Lab-scale experiments were carried out to demonstrate the basic process and evaluate key parameters. The laboratory work indicates that using aliphatic/aromatic solvent mixtures at 80 °C results in a recovery of nearly 100% of the biocrude from the product mixture with reduced carbon content on the hydro-char. The findings illustrate the potential of solvent extraction for HTL biocrude processing. On a commercial scale, such a process may de-risk HTL, improving prospects for commercialization, opening the door to widespread conversion of wet-waste and waste biomass to sustainable fuels by HTL.
期刊介绍:
Sustainable Energy & Fuels will publish research that contributes to the development of sustainable energy technologies with a particular emphasis on new and next-generation technologies.