首页|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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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.
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
Engineering Research Center of Non-metallic Minerals of Zhejiang Province,Zhejiang Institute of Geology and Mineral Resources,Hangzhou 310007,China
Qing Yang Institute for Industrial Minerals,Qingyang 242804,China
National Natural Science Foundation of Chinaresearch grants from Engineering Research Center of Nonmetallic Minerals of Zhejiang Provinceprojects from Qi ng Yang Institute for Industrial Minerals
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