Selective Hydrogenation of Cinnamaldehyde over Cu/Al2O3 Catalyst Prepared by Coprecipitation
共沉淀法制备氧化铝负载铜催化剂及其在肉桂醛选择性加氢反应中的应用

A series of alumina supported Cu catalyst were prepared by coprecipitation method.XRD,N2 physical adsorption and SEM were used to study the catalysts.Its catalytic performance in cinnamaldehyde(CMA) hydrogenation was investigated.The results showed that the catalyst prepared by coprecipitation had higher activity of cinnamaldehyde hydrogenation compared with the catalyst prepared by impregnation.The active component particle size increased with the increase of calcination temperature,while the conversion rate of cinnamaldehyde increased firstly and then decreased.The catalyst reduced at 873 K showed the highest activity of cinnamaldehyde hydrogenation.The conversion rate of CMA increased with the increase of reaction temperature,but the cinnamyl alcohol selectivity decreased.The conversion rate of CMA was 14.7% and the selectivity of cinnamyl alcohol 56.5% at 2 MPa and 363 K after reaction 4 h.