Conversion of ethanol into linear primary alcohols on gold, nickel, and gold–nickel catalysts

Resumo

The direct conversion of ethanol into the linear primary alcohols C_nH_2n+1OH (n = 4, 6, and 8) in the presence of the original mono- and bimetallic catalysts Au/Al₂O₃, Ni/Al₂O₃, and Au–Ni/Al₂O₃ was studied. It was established that the rate and selectivity of the reaction performed under the conditions of a supercritical state of ethanol sharply increased in the presence of Au–Ni/Al₂O₃. The yield of target products on the bimetallic catalyst was higher by a factor of 2–3 than that reached on the monometallic analogs. Differences in the catalytic behaviors of the Au, Ni, and Au–Ni systems were discussed with consideration for their structure peculiarities and reaction mechanisms.