Lenka Skuhrovcová , Jiří Kolena , Karel Frolich , Jaroslav Kocík , Jáchym Mück , Zahra Gholami
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引用次数: 0
Abstract
This study introduces a novel Cu-based catalyst for the selective hydrogenolysis of glycerol to 1,2-propanediol, synthesized by impregnating mesoporous γ-alumina with Cu and Fe. Characterization was performed using various analytical methods, and tests were conducted in a tubular continuous reactor under specific conditions. Iron was found to have multiple modifying effects, influencing the modification of Cu clusters on the catalyst surface and the radial Cu concentration profile inside the particles. A low Fe/Cu ratio resulted in an almost egg-shell Cu profile, whereas higher Fe levels produced a more uniform distribution. Interestingly, minor Fe additions led to larger Cu clusters, while higher amounts resulted in smaller clusters and decreased glycerol conversion. The effect of Fe on Cu clusters size, acid sites concentration, and Cu radial profile, as well as the influence of these parameters on the glycerol conversion and selectivity towards 1,2-PD are discussed in this study.
本研究介绍了一种新型铜基催化剂,该催化剂是通过在介孔γ-氧化铝中浸渍铜和铁合成的,用于将甘油选择性氢解为 1,2-丙二醇。使用各种分析方法对其进行了表征,并在特定条件下在管式连续反应器中进行了测试。研究发现,铁具有多种改性作用,可影响催化剂表面 Cu 簇的改性和颗粒内部径向 Cu 浓度分布。铁/铜比率低时,铜的分布几乎呈蛋壳状,而铁含量高时,铜的分布更加均匀。有趣的是,添加少量的铁会产生较大的铜簇,而添加较多的铁则会产生较小的铜簇并降低甘油转化率。本研究讨论了铁对 Cu 簇大小、酸性位点浓度和 Cu 径向分布的影响,以及这些参数对甘油转化率和对 1,2-PD 选择性的影响。
期刊介绍:
Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications.
Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.