Co_2 Hydrogenation to Alcoholos over Highly Dispersed Co/SiO_2 Catalysts Derived from Acetate

摘要

Highly dispersed Co(A)/SiO_2 catalysts were prepared from acetate, and used for CO_2 hydrogenation to alcohols under the reaction conditions of T = 493 K, P = 2.1 MPa, H_2/CO_2 = 3/1, and GHSV = 2000 h~(-1). Catalytic activity was greatly improved by adding a small amount of Ir to the catalyst, and methanol (ca. 20%) was formed, in contrast with Co(N)/SiO_2 catalyst derived from nitrate. Ethanol selectivity was increased up to 8% by adding Na salt to the Ir/Co(A)/SiO_2 catalyst.