Layer-by-layer fabrication of montmorillonite coating immobilizing Cu2O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

doi:10.1016/j.cjche.2023.11.024

中国化学工程学报 ›› 2024, Vol. 68 ›› Issue (4): 263-275.DOI: 10.1016/j.cjche.2023.11.024

• • 上一篇

Layer-by-layer fabrication of montmorillonite coating immobilizing Cu₂O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

Kejin Li¹, Jiahui Liu¹, Dajian Li^1,3, Xiaolan Chen¹, Chunhui Zhou^1,2,3

1. Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China;
2. Qing Yang Institute for Industrial Minerals, Qingyang 242804, China;
3. Engineering Research Center of Non-metallic Minerals of Zhejiang Province, Zhejiang Institute of Geology and Mineral Resources, Hangzhou 310007, China

收稿日期:2023-05-26 修回日期:2023-11-23 出版日期:2024-04-28 发布日期:2024-06-28
通讯作者: Chunhui Zhou,E-mail address:clay@zjut.edu.cn
基金资助:
The authors wish to acknowledge the financial support from the National Natural Science Foundation of China (22072136; 41672033), the research grants from Engineering Research Center of Non-metallic Minerals of Zhejiang Province (ZD2023K01), and the projects from Qing Yang Institute for Industrial Minerals (KYY-HX-20220336; KYY- HX-20170557).

Layer-by-layer fabrication of montmorillonite coating immobilizing Cu₂O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

Kejin Li¹, Jiahui Liu¹, Dajian Li^1,3, Xiaolan Chen¹, Chunhui Zhou^1,2,3

1. Research Group for Advanced Materials & Sustainable Catalysis (AMSC), State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China;
2. Qing Yang Institute for Industrial Minerals, Qingyang 242804, China;
3. Engineering Research Center of Non-metallic Minerals of Zhejiang Province, Zhejiang Institute of Geology and Mineral Resources, Hangzhou 310007, China

Received:2023-05-26 Revised:2023-11-23 Online:2024-04-28 Published:2024-06-28
Contact: Chunhui Zhou,E-mail address:clay@zjut.edu.cn
Supported by:
The authors wish to acknowledge the financial support from the National Natural Science Foundation of China (22072136; 41672033), the research grants from Engineering Research Center of Non-metallic Minerals of Zhejiang Province (ZD2023K01), and the projects from Qing Yang Institute for Industrial Minerals (KYY-HX-20220336; KYY- HX-20170557).

摘要/Abstract

摘要： Microreactors are increasingly used for green and safe chemical processes owing to their benefits of superior mass and heat transfer, increased yield, safety, and simplicity of control. However, immobilizing catalysts in microreactors remains challenging. In this investigation, a technique for creating Cu₂O/montmorillonite catalyst coating, using electrostatic attraction for layer-by-layer self-assembly, was proposed. The montmorillonite film's morphology and thickness could be efficiently regulated by adjusting the degree of exfoliation and surface charge of montmorillonite, alongside layer-by-layer coating times. The Cu₂O nanoparticles were immobilized using the flow deposition approach. The resulting Cu₂O@montmorillonite-film-coated capillary microreactor successfully transformed glycerol into dihydroxyacetone. The conversion of glycerol and product selectivity could be controlled by adjusting the molar ratio of reactants, temperature, residence time, and Cu₂O loading. The maximum glycerol conversion observed was 47.6%, with a 27% selectivity toward dihydroxyacetone. The study presents a technique for immobilizing montmorillonite-based catalyst coatings in capillary tubing, which can serve as a foundation for the future application of microreactors in glycerol conversion.

关键词: Microreactor, Coating, Montmorillonite, Glycerol, Cu₂O

Abstract: Microreactors are increasingly used for green and safe chemical processes owing to their benefits of superior mass and heat transfer, increased yield, safety, and simplicity of control. However, immobilizing catalysts in microreactors remains challenging. In this investigation, a technique for creating Cu₂O/montmorillonite catalyst coating, using electrostatic attraction for layer-by-layer self-assembly, was proposed. The montmorillonite film's morphology and thickness could be efficiently regulated by adjusting the degree of exfoliation and surface charge of montmorillonite, alongside layer-by-layer coating times. The Cu₂O nanoparticles were immobilized using the flow deposition approach. The resulting Cu₂O@montmorillonite-film-coated capillary microreactor successfully transformed glycerol into dihydroxyacetone. The conversion of glycerol and product selectivity could be controlled by adjusting the molar ratio of reactants, temperature, residence time, and Cu₂O loading. The maximum glycerol conversion observed was 47.6%, with a 27% selectivity toward dihydroxyacetone. The study presents a technique for immobilizing montmorillonite-based catalyst coatings in capillary tubing, which can serve as a foundation for the future application of microreactors in glycerol conversion.

Key words: Microreactor, Coating, Montmorillonite, Glycerol, Cu₂O

Kejin Li, Jiahui Liu, Dajian Li, Xiaolan Chen, Chunhui Zhou. Layer-by-layer fabrication of montmorillonite coating immobilizing Cu₂O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone[J]. 中国化学工程学报, 2024, 68(4): 263-275.

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Layer-by-layer fabrication of montmorillonite coating immobilizing Cu₂O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

Layer-by-layer fabrication of montmorillonite coating immobilizing Cu₂O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone

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