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

采用共沉淀法制备了Al2O3负载Cu催化剂，表征了其晶相、孔结构、表面形貌，考察了制备条件对催化肉桂醛加氢性能的影响. 结果表明，与浸渍法所制催化剂相比，共沉淀法所制催化剂具有更高的肉桂醛加氢活性；随焙烧温度升高，催化剂活性组分粒径增大，肉桂醛的转化率先升高后下降，873 K还原的催化剂的活性最高；随反应温度升高，反应速率迅速上升，肉桂醇的选择性则下降. 在2 MPa和363 K条件下，反应4 h后肉桂醛的转化率为14.7%，肉桂醇的选择性为56.5%.

Selective Hydrogenation of Cinnamaldehyde over Cu/Al2O3 Catalyst Prepared by Coprecipitation

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.