关键词: 仲丁醇, 催化脱氢, 甲乙酮, 铜锌催化剂

Abstract: Copper-zinc catalysts prepared by co-precipitation and physical mixing were characterized by TPR，XRD and N2O adsorption-decomposition techniques to analyze the roles of ZnO and Cu in the dehydrogenation of sec-butanol (SBA). The studies suggested that Cu0 were active sites and ZnO was provided with the properties of dispersion and anti-sintering of Cu species. ZnO could effectively disperse Cu species and prevent Cu0 from sintering because (CuZn)x(OH)y(CO3)z(x=1,5；y=2,6；z=1,2) precursor was formed in catalyst preparation and highly dispersed CuO-ZnO solid solution was shaped after calcination. Optimum Cu/Zn molar ratio was also studied for the dehydrogenation tests of SBA. Cu/Zn molar ratio at 1∶1 exhibited excellent reactivity. Conversion of SBA and yield of methyl ethyl ketone (MEK) reached 80.54% and 76.04%，respectively，under atmospheric pressure，at reaction temperature 240 ℃ and weight space velocity 17.5 h?1. The dehydrogenation activity of copper-zinc catalyst was not in linear relationship with Cu0 surface area，indicating that dehydrogenation of SBA could be a structure-sensitive reaction.

Key words: sec-butanol, catalytic dehydrogenation, methyl ethyl ketone, copper-zinc catalyst