Tian Li, Hongcai Su, Lingjun Zhu, Dan Xu, Na Ji, Shurong Wang
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引用次数: 0
摘要
作为生物质热液转化过程中产生的主要含氧有机产品之一，乙酰丙酸（LA）具有进一步升级的潜力。这项工作研究了生物质衍生 LA 的蒸汽重整 (SR) 过程以产生 H2。通过共沉淀和浸渍法合成了一系列由不同尖晶石支撑的镍催化剂。镍活性金属很好地分散在具有高比表面积的 NiAl2O4 催化剂上，从而表现出很高的催化活性。在所有测试的催化剂中，15Ni/NiAl2O4 对 LA 的 SR 性能最佳，在 800 °C 的反应温度下，碳转化率高达 96.3%，H2 产率高达 92.8%，H2 浓度高达 67.9%。此外，还考察了反应温度、蒸汽碳比（S/C）和液体时空速度（LHSV）的影响。此外，在连续 40 小时的 LA SR 过程中，15Ni/NiAl2O4 催化剂保持了出色的催化活性。这项研究为将生物质衍生的 LA 升级为生态友好型高价值燃料提供了一条令人鼓舞的途径，从而推动了生物质提炼工艺的可持续性。
Hydrogen production from steam reforming of biomass-derived levulinic acid over highly stable spinel-supported Ni catalysts
As one of the main oxygen-containing organic products generated from the hydrothermal conversion of biomass, levulinic acid (LA) has the potential to be further upgraded. This work investigated the steam reforming (SR) process of biomass-derived LA to produce H2. A series of Ni catalysts supported by various spinels were synthesized via co-precipitation and impregnation. The Ni active metal dispersed well on the NiAl2O4 catalyst with high specific surface area, thereby exhibiting high catalytic activity. Among all the catalysts tested, 15Ni/NiAl2O4 showed the best performance for SR of LA, resulting in high carbon conversion of 96.3%, H2 yield of 92.8%, and H2 concentration of 67.9% at a reaction temperature of 800 °C. Additionally, the influences of reaction temperature, steam-to-carbon ratio (S/C), and liquid hourly space velocity (LHSV) were also examined. Moreover, during the 40-h continuous SR process of LA, the 15Ni/NiAl2O4 catalyst maintained its outstanding catalytic activity. This study provides an encouraging route for upgrading biomass-derived LA into eco-friendly and high-value fuels, thereby advancing the sustainability of the biomass refining process.
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