分层 CsAlTi-BEA 沸石在苯乙烯与 Co2 转化为环状碳酸盐过程中的催化特性

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Theoretical and Experimental Chemistry Pub Date : 2024-03-20 DOI:10.1007/s11237-024-09794-9

M. M. Kurmach, D. V. Kyryliuk, A. O. Samotoi, S. O. Sotnik, P. S. Yaremov, O. V. Shvets, N. D. Shcherban

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引用次数: 0

摘要

由于沸石结构中存在由四面体配位的 Ti4+ 离子形成的高浓度路易斯酸位点，以及 Cs+ 阳离子对布伦斯特酸位点的中和作用，分层 CsAlTi-BEA 沸石在二氧化碳压力下由苯乙烯生成环碳酸盐的串联反应中表现出很高的催化活性。苯乙烯转化为环氧化物并进一步转化为碳酸盐的转化率随样品中钛含量的增加而增加，而环状碳酸盐的选择性则随铯含量的增加而增加。

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Catalytic Properties of Hierarchical CsAlTi-BEA Zeolites in the Process of Conversion of Styrene with Co2 for Cyclic Carbonate Formation

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Catalytic Properties of Hierarchical CsAlTi-BEA Zeolites in the Process of Conversion of Styrene with Co2 for Cyclic Carbonate Formation

Hierarchical CsAlTi-BEA zeolites, due to the presence of a high concentration of Lewis acid sites formed by tetrahedrally coordinated Ti⁴⁺ ions in the zeolite structure and the neutralization of Brønsted acid sites by Cs⁺ cations, exhibit high catalytic activity in the tandem reaction of cyclic carbonate formation from styrene in the presence of tert-butyl hydroperoxide under CO₂ pressure. The conversion of styrene into epoxide and further into carbonate increases with the content of titanium in the samples, while the selectivity for the cyclic carbonate increases with the content of cesium.

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来源期刊

Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.