Catalyst for preparing olefin by dehydrogenation of low-carbon alkane as well as preparation method and application of catalyst

The invention discloses a catalyst for preparing olefin by dehydrogenation of low-carbon alkane and a preparation method and application thereof. The catalyst comprises an alumina carrier, a main active component containing Pt and an auxiliary component, the auxiliary agent component comprises a first auxiliary agent containing Sn, a second auxiliary agent containing at least one of alkali metal and/or alkaline earth metal, a third auxiliary agent containing at least one of B, Ga and In, and a fourth auxiliary agent containing at least one of IVB group transition metal elements. 本发明公开了一种低碳烷烃脱氢制烯烃的催化剂及其制备方法和应用，催化剂包括氧化铝载体、含有Pt的主活性组分和助剂组分，所述助剂组分包含含有Sn的第一助剂、含有碱金属和/或碱土金属中的至少一种的第二助剂、含有B、Ga和In中的至少一种第三助剂以及含有IVB族过渡金属元素中的至少一种的第四助剂。