tio_2负载金属催化剂水热液化sinapensis生物质：生物油收率及组成研究

IF 4.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-08-21 DOI:10.1016/j.supflu.2025.106745

Halil Durak , Salih Genel , Yaşar Genel

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引用次数: 0

摘要

水热液化（HTL）催化系统的开发是将木质纤维素生物质转化为高能量密度生物燃料的关键。本研究在275-325℃的温度范围内，利用tio2负载催化剂，特别是Fe、Al和Fe - Al，研究了sinapi arvensis生物质的HTL过程。采用初湿浸渍法合成催化剂，并利用x射线衍射（XRD）、x射线光电子能谱（XPS）、x射线荧光（XRF）、扫描电子显微镜（SEM-EDX）和电感耦合等离子体发射光谱（ICP-OES）等技术对催化剂进行表征，评价催化剂的元素分布和表面化学性质。研究结果表明，Al/TiO 2催化剂通过酸催化脱水和脱羧来促进轻质生物油的生产，而Fe/TiO 2催化剂通过氧化还原辅助解聚来促进重质生物油的生产。Fe-Al /TiO 2双功能催化剂表现出优异的生物质转化率，生成更多的脂肪烃。气相色谱-质谱分析（GC-MS）揭示了催化剂如何影响产物分布，增加单芳香族和脂肪族化合物，减少含氧实体。元素分析证实，催化生物油的碳含量更高，氧含量更低，热值更高（hhv），表明燃料质量得到了提高。

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Hydrothermal liquefaction of sinapis arvensis biomass using TiO₂-supported metal catalysts: A study on bio-oil yield and composition

The development of catalytic systems for hydrothermal liquefaction (HTL) is crucial for transforming lignocellulosic biomass into biofuels with high energy density. This research investigates the HTL process of Sinapis arvensis biomass using TiO₂-supported catalysts, specifically Fe, Al, and Fe–Al, at temperatures from 275–325 °C. The catalysts were synthesized through incipient wetness impregnation and characterized using techniques like X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray fluorescence (XRF), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), and inductively coupled plasma optical emission spectrometry (ICP-OES) to evaluate element distribution and surface chemistry. Findings show that the Al/TiO₂ catalyst boosted lighter bio-oil production via acid-catalyzed dehydration and decarboxylation, while the Fe/TiO₂ catalyst favored heavier oils through redox-assisted depolymerization. The Fe–Al/TiO₂ bifunctional catalyst exhibited superior biomass conversion, yielding more aliphatic hydrocarbons. Gas chromatography-mass spectrometry (GC-MS) revealed how catalysts influenced product distributions, increasing monoaromatic and aliphatic compounds and reducing oxygenated entities. Elemental analysis confirmed higher carbon content, lower oxygen levels, and improved higher heating values (HHVs) in catalyzed bio-oils, indicating enhanced fuel quality.

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.