NI-COATED AL203@SI02 CATALYST, PREPARATION METHOD THEREOF AND APPLICATION THEREOF

摘要

A Ni-Al₂O₃@SiO₂ catalyst with coated structure is provided. The catalyst has a mass ratio of respective compositions Al₂O₃:SiO₂:Ni=100: 0.1 ∼ 3: 4 ∼ 26, a specific surface area of 98 m²/g to 245 m²/g, and a pore volume of 0.25 cm³/g to 1.1 cm³/g; Ni particles are distributed on a surface of an Al₂O₃ carrier in an amorphous or highly dispersed state and have a grain size less than or equal to 8 nm, and a SiO₂ layer is filled among the Ni particles. The invention has advantages of easy to prepare and good selectivity.