Preparation method of metal oxide loaded nano zeolite particle catalyst

A preparation method of a metal oxide loaded nano zeolite particle catalyst, comprising:

• S1:
• pretreating industrial γ-Al2O3 balls:
• adding a quaternary ammonium alkali solution to wash industrial γ-Al2O3 balls, and then drying to obtain pretreated γ-Al2O3 balls;
• S2:
• synthesizing an alumina loaded zeolite material via a hydrothermal method:
• mixing a silicon source, an aluminum source, an alkali source, a template agent, and deionized water to generate a zeolite precursor solution, then adding the pretreated γ-Al2O3 balls obtained in a step S1 to obtain mixture;
• transferring the mixture into a hydrothermal reaction kettle;
• hydrothermally crystallizing the mixture to generate an alumina loaded zeolite material;
• taking out the alumina loaded zeolite material;
• washing the alumina loaded zeolite material with the deionized water for several times and then drying the alumina loaded zeolite material to obtain a dried alumina loaded zeolite material;
• S3:
• preforming a two-step high-temperature heat treatment:
• calcining the dried alumina loaded zeolite material in a step S2 at a low temperature, then performing ammonium exchange, and then calcining at a high temperature to obtain an alumina loaded nano zeolite particle material;
• and
• S4:
• loading metal:
• preparing a salt solution containing Group VIB metals and/or Group VIII metals, adding the alumina loaded nano zeolite particle material prepared in a step S3, drying after impregnation, and finally calcining to obtain the metal oxide loaded nano zeolite particle catalyst.