Synthetic gas decarbonylation iron-nickel protective agent and preparation method thereof

According to the synthetic gas decarbonylation iron-nickel protective agent and the preparation method thereof provided by the invention, the protective agent fully and physically absorbs carbonyl iron-nickel by utilizing the characteristics of large specific surface, multiple micropores and the like of a molecular sieve carrier, and then the carbonyl iron-nickel is subjected to catalytic dissociation at a copper-zinc active center and then is deposited. The copper-zinc protective agent has good decarbonylation iron-nickel activity and high-iron-nickel capacity, and is composed of a metal active center including Cu and Zn and a carrier having a high silica-alumina ratio molecular sieve. The metal active centers of the system exist in the form of basic composite salt, are uniformly distributed among molecular sieve carriers, and are alternately and circularly attached to the carriers. According to the decarbonylation iron-nickel protective agent prepared by the scheme, the activity of a copper-zinc system prot