将水热液化生物原油的多级预处理作为可持续航空燃料生产的前驱体

IF 7.2 2区 工程技术 Q1 CHEMISTRY, APPLIED Fuel Processing Technology Pub Date : 2024-08-26 DOI:10.1016/j.fuproc.2024.108118
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引用次数: 0

摘要

将热液液化生物原油升级为可持续航空燃料所面临的一个主要挑战是无机材料的存在。与商业原油或能源作物生物燃料不同,水热液化生物原油中过量的盐、水和灰分等杂质会导致加氢处理过程中催化剂失活、蒸馏效率降低以及碱沉积物造成设备堵塞。因此,有效去除高温热液化生物原油中的这些杂质至关重要。这项工作研究了一种新型的三阶段预处理工艺,在不使用化学品的情况下去除水、盐和灰分,从而生产出适合加氢处理的 HTL 生物原油前体。研究确定了水油比(W:O)、温度和时间对脱盐效率的影响。预处理后,81% 的盐分被去除,总含盐量降至 0.1%。从两种原料中提取的生物原油的元素组成和燃料理化性质得到了改善,氧含量降低了 39.8%,硫含量降低了 55%,氮含量降低了 22.2%,高热值提高了 9.86%,总酸值降低了 73.4%,粘度降低了 99.9%,密度降低了 17.0%。与单步蒸馏预处理相比,三步预处理增加了盐和杂原子的去除率,提高了热值,降低了酸度。前驱体质量可用于后续加氢处理和其他下游炼油工艺。
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Multi-stage pretreatment of hydrothermal liquefaction biocrude oil as a precursor for sustainable aviation fuel production

A major challenge for upgrading hydrothermal liquefaction biocrude into sustainable aviation fuel is the presence of inorganic material. Unlike commercial crude oil or biofuel from energy crops, excessive amounts of contaminants such as salt, water, and ash in biocrude oil from hydrothermal liquefaction can cause catalyst deactivation during hydroprocessing, decreased distillation efficiency, and equipment fouling from alkali deposits. Therefore, efficient removal of these impurities in HTL biocrude oil is essential. This work investigated a novel 3-stage pretreatment process, removing water, salt, and ash without chemicals, to produce a HTL biocrude oil precursor suitable for hydroprocessing. The influence of water to oil (W:O) ratio, temperature, and time on desalting efficiency was determined. After pretreatment, 81% of salt was removed, reducing total salt content to <0.1%. Improvements in elemental composition and physicochemical fuel properties were observed in biocrude oils from two feedstocks, with up to 39.8% decrease in oxygen content, 55% decrease in sulfur content, 22.2% decrease in nitrogen content, 9.86% increase in higher heating value, 73.4% decrease in total acid number, 99.9% decrease in viscosity, and 17.0% decrease in density. Compared with a single-step distillation as pretreatment, 3-stage pretreatment resulted in increased salt and heteroatom removal, improved heating value, and lower acidity. The precursor quality was viable for subsequential hydrotreating and other downstream refinery processes.

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来源期刊
Fuel Processing Technology
Fuel Processing Technology 工程技术-工程:化工
CiteScore
13.20
自引率
9.30%
发文量
398
审稿时长
26 days
期刊介绍: Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.
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