Zn(Ac)_2/C催化剂物理性质与催化活性的关系  

RELATIONSHIP BETWEEN PHYSICAL PROPERTIES AND CATALYTIC PERFORMANCE OF Zn(Ac)_2/C CATALYSTFOR VINYL ACETATE SYNTHESIS

作　　者：周桂林[1,2] 蒋毅[1] 吕绍洁[1] 邱发礼[1] 

机构地区：[1]中国科学院成都有机化学研究所,成都610041 [2]中国科学院研究生院

出　　处：《石油炼制与化工》2005年第6期53-57,共5页Petroleum Processing and Petrochemicals

基　　金：中国科学院;重庆市科技成果孵化基金资助项目(002-7)。

摘　　要：用比表面积不同的活性炭负载醋酸锌[Zn(Ac)2/C]催化剂,在接近现有工业生产条件下研究了不同Zn(Ac)2/C催化剂合成醋酸乙烯(VAc)的催化活性及反应前后催化剂物性的变化。结果表明,在Zn(Ac)2负载量一定时,催化剂的比表面积越大,反应后催化剂的比表面积、孔分布及堆密度变化越小。在相同的反应条件下,催化剂的比表面积越大,催化活性越高,反应受空速的影响越大;催化剂比表面积越大,在高温段时合成反应受反应温度影响的程度越小。在空速为360h-1、反应温度为175℃时,采用比表面积为531.5m2/g的催化剂合成VAc的生产能力达2.96g/(mL·d)。The catalytic activity of vinyl acetate （VAc） synthesis was studied under close to industrial operation conditions using Zn（Ac）2/C catalyst with different specific surface areas. Physical properties of fresh and used catalysts such as surface area, pore size distribution and bulk density were compared. The Test results indicated that with constant Zn（Ac）2 content, as compared with lower surface area catalyst, the catalyst having higher surface area exhibited better structure stability with less changes in physical properties after reaction; the catalytic performance of said catalyst was also improved, higher activity, more sensitive to space velocity and less sensitive to temperature in high reaction temperature zone. Under the reaction conditions of space velocity 360h^-1 and reaction temperature 170℃, the productivity of vinyl acetate synthesis reached 2. 96 g/（mL·d） with the Zn（Ac）2/C catalyst having a surface area of 531.5m^2/g.

关 键 词：催化剂 活性 生产能力 表面积 孔分布 催化活性 物理性质 比表面积 反应条件 合成反应 

分 类 号：O643.36[理学—物理化学]