Abstract Catalysts C600, C700, and C800 prepared from Ca(CH3COO)2 calcination at 600, 700, and 800 °C, respectively, were characterized with an X-ray diffractometer, scanning electron microscope, and specific surface area analyzer. Over the catalysts, bio-oils (BOs) were obtained by the supercritical ethanolysis (SCE) of wheat stalk powder (WSP). Their yields, ultimate analyses, chemical composition and some fuel properties were investigated. WSP and the residues from the SCE of WSP were analyzed with a Fourier transform infrared spectrometer. The results show that C700 has a small particle size and large specific surface area, and can effectively catalyze the SCE of WSP. The BO yields from non-catalytic, C600 , C700 , and C800-catalyzed SCE of WSP are 30.1, 22.9, 70.7 and 34.4%, respectively. BO700 from C700-catalyzed SCE of WSP has relatively higher H/C and H/O ratios and calorific value but lower acidity, kinematic viscosity, and water content. The relative content of alcohols in the BO obviously increased, while the contents of carboxylic acids, ethyl esters, and anhydrides decreased over C700.

中文翻译：

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小麦秸秆在氧化钙上的超临界乙醇分解

摘要 采用 X 射线衍射仪、扫描电子显微镜和比表面积分析仪对 Ca(CH3COO)2 分别在 600、700 和 800 °C 下煅烧制备的催化剂 C600、C700 和 C800 进行了表征。在催化剂上，通过小麦秸秆粉 (WSP) 的超临界乙醇分解 (SCE) 获得生物油 (BO)。研究了它们的产量、最终分析、化学成分和一些燃料特性。WSP 和来自 WSP 的 SCE 的残留物用傅里叶变换红外光谱仪进行分析。结果表明，C700粒径小，比表面积大，能有效催化WSP的SCE。WSP 的非催化、C600、C700 和 C800 催化的 SCE 的 BO 产率分别为 30.1、22.9、70.7 和 34.4%。来自 WSP 的 C700 催化 SCE 的 BO700 具有相对较高的 H/C 和 H/O 比和热值，但较低的酸度、运动粘度和含水量。BO中醇的相对含量明显增加，而羧酸、乙酯和酸酐的含量在C700以上下降。