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The texture of a series of dealuminated macrocrystalline beta zeolites has been investigated by N 2 physisorption, transmission electron microscopy, and electron diffraction. Hydrothermal dealumination creates a secondary mesoporous system in zeolite BEA. N 2 physisorption together with DFT calculations indicated the presence of pores with an estimated size of 2-4 nm after steaming...
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