Abstract:
Selective hydrogenation of dodecanoic acid over supported bimetallic Ni-Sn alloy catalysts into do decane-1-ol is demonstrated. Bimetallic nickel-tin supported on titanium oxide (Ni-Sn(1.5)/TiO2) and
gamma-alumina (Ni-Sn(1.5)/-Al2O3); 1.5 = Ni/Sn molar ratio) were synthesized via hydrothermal
method in a sealed-Teflon autoclave reactor at 150 oC for 24 h, then followed by reducing with hydro gen gas at 400 oC for 1.5 h. The synthesized catalysts were characterized by means of XRD, IC-AES,
N2-adsorption (BET method), H2-chemisorption, and NH3-TPD. Bimetallic Ni-Sn(1.5)/TiO2 catalyst was
found to be effective for hydrogenation of dodecanoic acid (>99 % conversion) to dodecane-1-ol (93%
yield) at 160 oC, 30 bar H2, and 20 h and the highest dodecane-1-ol (97 % yield) was obtained at initial
pressure of H2, 50 bar. An increase of reaction temperature slightly enhanced the degree of hydrode oxygenation of dodecanoic acid to produce dodecane over both Ni-Sn(1.5)/TiO2 and Ni-Sn(1.5)/-Al2O3
catalysts.
