松香歧化纳米镍负载型催化剂的失活原因及再生工艺研究  

Study on Deactivation and Regeneration of Ni-loaded Nanocatalyst for Disproportionation of Gum Rosin

作　　者：王亚明[1] 王震[1] 蒋丽红[1] 王路辉[1] 罗康碧[1] 束嘉秀[1] 

机构地区：[1]昆明理工大学生物与化学工程学院,云南昆明650224

出　　处：《林产化学与工业》2007年第2期7-10,共4页Chemistry and Industry of Forest Products

基　　金：云南省跨世纪学术和技术带头人后备人才培养基金资助项目(1999B002G)

摘　　要：用醇盐水解法制得纳米镍负载型松香歧化新型催化剂,用此催化剂催化松香歧化,考察了催化剂的寿命。用扫描电镜、原子吸收分光光度法、X射线衍射光谱、比表面积测定等手段研究了该催化剂失活的原因,筛选出该催化剂再生的最佳工艺条件:焙烧过程通入空气和氮气,焙烧温度450℃,时间2h,催化剂还原温度300℃。用此方法反复再生5次,催化剂性能基本保持不变。Ni-loaded nanocatalyst has been prepared by means of metal alkoxide hydrolysis. The lifetime of the catalyst for catalyzing disproportionation of gum rosin is investigated. The cause of deactivation was investigated by TEM, AAS, XRD and BET. The conditions for regeneration of the catalyst, such as calcination temperature, calcination time, calcination environment, reduction temperature are respectively studied. The activity of catalyst could be kept constant for 5 times of regeneration under the conditions of air ＋ N2 stream during calcination at temperature 450℃, calcination time 2 h, reduction temperature 300℃.

关 键 词：纳米粒子 镍负载催化剂 松香歧化反应 失活 再生 

分 类 号：TQ351.471[化学工程] TQ426