Layer-by-layer fabrication of montmorillonite coating immobilizing Cu_(2)O nanoparticles for continuously catalyzing glycerol to dihydroxyacetone  

作　　者：Kejin Li Jiahui Liu Dajian Li Xiaolan Chen Chunhui Zhou 

机构地区：[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

出　　处：《Chinese Journal of Chemical Engineering》2024年第4期263-275,共13页中国化学工程学报（英文版）

基　　金：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);the projects from Qing Yang Institute for Industrial Minerals(KYYHX-20220336;KYY-HX-20170557).

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 Cu_(2)O/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 Cu_(2)O nanoparticles were immobilized using the flow deposition approach.The resulting Cu_(2)O@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 Cu_(2)O 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 Cu_(2)O 

分 类 号：TQ224.6[化学工程—有机化工] TQ426