Mesoporous Zeolitic Materials (MZMs) Derived From Zeolite Y Using a Microwave Method for Catalysis
Mesostructured zeolitic materials (MZMs) with relatively high acidity in comparison with the mesoporous siliceous MCM 41 were prepared via an efficient, mild, and simple post synthetic treatment of Y zeolite facilitated by microwave irradiation, i.e. microwave assisted chelation (MWAC) The disordered mesoporous aluminosilicates materials (DMASs) of MZM were created from Y zeolite in the absence of using mesoscale templates. The prepared DMASs showed the good mesoporous features with the mesopore area and volume of ~260 m2 g 1 and ~0.37 cm3 g 1, respectively, and with the mesopore sizes distributed in a range of 2 10 nm. MZMs possess a total acidity of about 0.6 mmol g 1 and exhibited comparatively superior catalytic activity to the parent Y zeolite and MCM 41 in the vapor phase catalytic dealkylation of 1,3,5 triisopropylbenzene (TiPBz) and liquid phase catalytic aldol condensation of benzaldehyde with 1 heptanal. Although the yield loss was inevitable for preparing MZMs using the MWAC method, the preliminary economic analysis of the preparation cost of MZMs showed the promise. Additionally, a comprehensive comparison of the state of the art mesoporous materials concerning their sustainable aspects was made, showing that MZMs are promising mesoporous materials for further development and functionalization for catalysis.
Frontiers in Chemistry