成分可微调的 CoCuMgAl 混合氧化物基催化剂用于呋喃化合物的加氢反应

L. N. Stepanova, R. M. Mironenko, M. Trenikhin, A. Serkova, A. Salanov, A. V. Lavrenov
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引用次数: 0

摘要

研究人员合成了基于 CoCuMgAl 混合氧化物的催化剂,并在不同条件下对糠醛和 5-羟甲基糠醛的加氢反应进行了研究。使用一系列物理方法(XRD、SEM 和 TEM)研究了催化剂在不同制备阶段的结构特性变化。结果表明,通过精细调节混合氧化物的化学成分(即改变 Co/Cu 的比例),可以改变样品的结构、形态和催化特性。Co/Cu = 1 催化剂的相组成在催化反应过程中没有发生变化,尽管最初的催化剂形态不太均匀。Co/Cu = 1 的样品的 5-羟甲基糠醛转化率更高。当 Co/Cu 比率提高时,糠醛转化率也随之提高。在温和的糠醛氢化条件下,Co/Cu = 2 的催化剂对糠醇的选择性超过 99%。这些结果对于为制备具有可微调成分的氢化催化剂奠定科学基础,以获得所需的氢化产物具有重要意义。
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CoCuMgAl-Mixed-Oxide-Based Catalysts with Fine-Tunable Composition for the Hydrogenation of Furan Compounds
Catalysts based on CoCuMgAl mixed oxides were synthesized and studied in the hydrogenations of furfural and 5-hydroxymethylfurfural under different conditions. The changes in the structural properties of the catalysts at different stages of their preparation were studied using a set of physical methods (XRD, SEM, and TEM). It was shown that the fine regulation of the chemical compositions of the mixed oxides (i.e., changes in the Co/Cu ratio) made it possible to vary the structure, morphology, and catalytic properties of the samples. The phase composition of catalysts with Co/Cu = 1 did not change during the catalytic reaction, although the initial catalysts had a less-homogeneous morphology. 5-hydroxymethylfurfural conversion was higher for the samples with Co/Cu = 1. Furfural conversion increased when raising the Co/Cu ratio. The selectivity toward furfuryl alcohol for the catalyst with Co/Cu = 2 under mild conditions of furfural hydrogenation was more than 99%. The results obtained are important for the development of the scientific foundations of the preparation of hydrogenation catalysts with a fine-tunable composition in order to obtain the desired hydrogenation products.
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