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Vapor phase synthesis of alkylpyrazines over ZnAl mixed oxide derived from layered double hydroxides obtained by the mechanochemical method
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.7 ) Pub Date : 2021-06-25 , DOI: 10.1007/s11144-021-02013-9
Florina Teodorescu , Andrei I. Slabu , Octavian D. Pavel

This study emphasizes on using different types of reactants to obtain compounds belonging to the same class, alkylpyrazines. The mechanism of these reactions is one of cyclo-dehydrogenation on the surface of a mixed oxide catalyst, e.g. ZnAl. Different types of reactions have been performed, using diamines, hydroxyamines or a diamine and a diol. The raw materials used and the various reaction parameters like temperature, space velocity and molar ratio of the reactants present a significant influence in the conversion and selectivity values. The conversion of reactants was quasi-total while the selectivity of the yielded products varies from 95.9% to a complex mixture of products. The ZnAl catalyst is thermally stable with the catalytic sites easily regenerated.

Graphical abstract



中文翻译:

由机械化学方法获得的层状双氢氧化物衍生的 ZnAl 混合氧化物气相合成烷基吡嗪

本研究强调使用不同类型的反应物来获得属于同一类的化合物,即烷基吡嗪。这些反应的机理是一种在混合氧化物催化剂(例如ZnAl)表面上的环脱氢作用。使用二胺、羟胺或二胺和二醇进行了不同类型的反应。所用的原材料和各种反应参数,如反应物的温度、空速和摩尔比,对转化率和选择性值有显着影响。反应物的转化率是准总转化率,而所得产物的选择性从 95.9% 到复杂的产物混合物不等。ZnAl 催化剂热稳定,催化位点容易再生。

图形概要

更新日期:2021-06-28
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