AuCl3基乙炔氢氯化催化剂的稳定性与催化性能研究

Investigation on the Stability and Catalytic Performances of AuCl3 Based Catalysts for Acetylene Hydrochlorination

为满足乙炔氢氯化对非汞催化剂的需求,本论文研究了不同配体对AuCl 3催化剂的稳定性与催化乙炔氢氯化性能的影响。热重-差热(TG-DSC)分析表明NaCl、KCl和CsCl与AuCl 3配合后,其初始分解温度随阳离子原子序数的增加而逐渐降低,但是反应最后的失重却逐渐减小。与此相对应,催化剂的催化性能也随碱金属离子原子序数的增大逐渐增强,这应该是归因于碱金属离子半径增大导致的离子外层电子活性增加,提高了催化剂活化乙炔和氯化氢的能力,所以催化剂的活性逐渐增强。

To meet the demands of the high performance catalysts for acetylene hydrochlorination,this paper reports the stability and catalytic performance for acetylene hydrochlorination of AuCl 3 based catalysts with different coordination compounds.Thermal-gravity and differential scanning calorimetry(TG-DSC)methods analysis show that the initial decomposition temperature of the compounds of AuCl 3 coordinated with NaCl,KCl and CsCl decreased with the increase of the atomic number of the anodic ions.At the same time,the catalytic performance of the catalysts also increases with the increase of the atomic number,which should be attributed the enlarged ionic radius resulted in the enhancement of the electronic activity of the atomic outer layer electrons.The activated electrons enhance catalytic activity for acetylene and hydrochloride and eventually improve the catalytic activity.