Are the active components the same for different specifications of ammonia catalysts?

No,they are different.

SYAMCAT A126 Ammonia Catalyst: Enhanced with α-Fe and Alkaline Metal Compounds

SYAMCAT A126 ammonia synthesis catalyst primarily consists of α-Fe as its main component, supplemented with appropriate amounts of alkali metal oxides and rare earth compounds acting as promoters and stabilizers. The key additives include aluminum trioxide, potassium oxide, calcium oxide, among others.

SYAMCAT A217 Ammonia Catalyst: Enriched with Iron(III) Oxide and Auxiliary Compounds

SYAMCAT A217 ammonia synthesis catalyst is primarily composed of iron(III) oxide, with additional amounts of cobalt oxide, aluminum oxide, potassium oxide, and calcium oxide as supporting agents.