SPECTROSCOPIC CHARACTERIZATION OF THE ACT IVE-SITE OF NC208 MODIFIED COPPER-BASED CATALYST FOR METHANOL SYNTHESIS

Spectroscopic characterization of the active base of an industrial cat alysts and NC208 modified copper-based catalysts for methanol synthesi s has been carried out: by means of XRD and FTIR methods. The experime ntal results showed that active site on functioning copper-based catal ysts for methanol synthesis is probably ''Cu-x(0)-Cu+-O-Zn2+/Al2O3-MO( x)'', and that the surface concentration of Cu+-site on functioning NC 208, prepared by adding small amount of the metal oxide MO(x) to indus trial catalyst C207, was higher than that of C207 catalyst, and that t he surface of functioning NC208 catalyst had higher Cu+/Cu-0 ratio and valence stability than that of C207. These peculiarities have close a relation with more persistent activity and higher thermal stability t han modified NC208 catalyst.