径向介孔中空硅球在微波加热两相反应微反应器中的应用

IF 5.3 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-10-07 DOI:10.1016/j.cattod.2025.115595

Masaki Okamoto , Hiroaki Ueda , Shuntaro Tsubaki , Yuji Wada

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引用次数: 0

摘要

采用径向介孔中空硅球作为微反应器，进行了丁醛缩醛的两相反应。将以2 M硫酸为催化剂填充的空心球作为水相，加入到丁醛为有机相的庚烷溶液中，在95℃下加热。由于乳化液中的液滴比空心球大，反应速率比不使用空心球的乳化液两相反应要高。在反应混合物相同温度下，采用微波加热时，反应速率比常规加热时有所提高。因为水能有效地吸收微波，而庚烷不能，所以只有空心球中的水相被微波选择性地加热。

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Application of hollow silica spheres with radially oriented mesopores to microreactors for two-phase reactions heated by microwave irradiation

Hollow silica spheres with radially oriented mesopores were used as microreactors for the two-phase reaction of the aldol condensation of butanal. The hollow spheres filled with 2 M sulfuric acid as a catalyst, which served as an aqueous phase, were added to the heptane solution of butanal, which served as an organic phase, and the mixture was heated at 95ºC. The reaction rate was higher than that of the emulsive two-phase reaction without the use of the hollow spheres because the droplets in the emulsion were larger than the hollow spheres. When microwave heating was used, the reaction rate increased compared with that when conventional heating was applied at the same temperature of the reaction mixture. Only the aqueous phase in the hollow spheres, where the reaction proceeded, was selectively heated by microwave irradiation because water effectively absorbs microwaves, whereas heptane cannot.

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.