超声波法研究F-T合成铁基催化剂机械强度  

Study on mechanical strength of iron catalyst for Fischer-Tropsch synthesis under ultrasonic radiation

作　　者：夏洁洁[1] 刘宗健[1] 杨霞珍[1] 刘化章[1] 

机构地区：[1]浙江工业大学工业催化研究所绿色化学合成技术国家重点实验室培育基地,浙江杭州310032

出　　处：《工业催化》2010年第10期37-41,共5页Industrial Catalysis

基　　金：浙江省科技厅重点项目(2006C21075)

摘　　要：采用超声波法研究了微颗粒催化剂磨损机械强度及其磨损机制,考察了超声介质、超声功率、固液比和超声时间等对磨耗率的影响,并在相同测试条件下,比较了熔铁催化剂和沉淀铁催化剂磨耗强度。结果表明,熔铁催化剂还原后耐磨强度略降,与此相反,沉淀铁催化剂还原后耐磨强度略有提高。由球磨法得到的熔铁催化剂存在较多微细粉末的粘附与团聚,影响测定结果,但熔铁催化剂的耐磨强度高于沉淀铁催化剂。基于形态和粒度分布的研究表明,超声波作用下熔铁催化剂主要磨损机制为剥层磨损,沉淀铁催化剂为体断裂或破碎机制。The mechanical strength and wear mechanism of iron catalysts were studied under ultrasonic radiation. The influence of ultrasonic medium, power, solid-liquid ratio and time on abrasion rate was investigated. At the same ultrasonic condition, mechanical strength of iron-based catalysts for Fischer- Tropsch synthesis was compared before and after reduction. The results showed that the mechanical strength of fused-iron catalyst and precipitated iron catalysts after reduction declined and enhanced a little, respectively. Although there is an adhesion phenomenon on the surface of the fused-iron catalyst, in general, the mechanical strength of fused-iron catalyst was higher than that of precipitated iron catalyst. SEM and particle size distribution results showed that the main wear mechanism for fused-iron catalyst was abrasion, while fragmentation was the main wear mechanism for precipitated iron.

关 键 词：催化剂工程 机械强度 超声波辐射 F—T合成 沉淀铁催化剂 熔铁催化剂 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]