Cu部分取代LaMnO_3催化剂上乙醇制备正丁醛和正丁醇的催化性能研究  

Performance of Ethanol to n-Butanal and n-Butanol over Cu-Substituted LaMnO_3 Catalyst

作　　者：张飞跃[1] 刘英杰[1] 范闽光[1] 马丽[1] 李景林[1] 李斌[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《精细化工》2011年第2期135-140,共6页Fine Chemicals

基　　金：国家自然科学基金(20763001);广西自然科学基金(2010GXNSFA013041)~~

摘　　要：采用改进的柠檬酸络合法制备了铜部分取代的LaMnO3催化剂,用XRD、IR、BET和SEM对催化剂进行了表征,无氧条件下考察该催化剂对无水乙醇的催化反应活性。结果表明,Cu2+部分取代后都能保持钙钛矿结构,随铜量增加,出现CuO、MnO2、La2O3等物相。B位取代比A位取代晶体结构畸变大,催化活性高于A位取代。所有催化剂中LaCu0.3Mn0.7O3的催化反应活性最佳,500℃乙醇的转化率为55.18%,正丁醛的选择性为41.30%,正丁醇的选择性为24.09%。A series of Cu2＋-substituted composite metal oxides LaMnO3 were prepared by the improved amorphous citric precursor method（IACP）,characterized by XRD,IR,BET and SEM,and tested the performance of ethanol to n-butanol and n-butanal without oxygen.The results showed that the Cu2＋-substituted products could reserve the perovskite-type crystal structure,and the crystalline phases of CuO,MnO2 and La2O3 appeared when the amount of copper increased.The aberrations of the B-substituted crystal structure was larger than those of the A-substituted,and the B-subsituted oxides,which showed a better activity than the A-subsituted.Among all the catalysts,LaCu0.3Mn0.7O3 exhibited the highest catalytic activity.Under the temperature of 500 ℃,the conversion of ethanol was 55.18%,and the selectivity of n-butanal and n-butanol was 41.30% and 24.09%,respectively.

关 键 词：LAMNO3 CU 乙醇 乙醛 正丁醇 正丁醛 催化与分离提纯技术 

分 类 号：TQ032[化学工程] O643.32[理学—物理化学]