催化材料的成型及力学性能研究

Research on the forming of catalyst materials and their mechanical property

催化材料在工业生产中应用广泛,90%以上的化工产品都是通过催化反应制备出来的,而催化反应的关键就是催化材料,俗称催化剂。其中,应用到多相反应中的工业催化剂,因对机械强度有较高的要求,需将其原粉成型至特定几何形状、尺寸后使用,以便抵挡反应过程中因应力变化造成的冲击。成型方法、工艺条件、成型后颗粒的标准化机械强度测试,以及系统分析催化材料的力学性能,是催化剂生产中的关键环节。本文主要论述了催化材料的种类、成型方式、强度测试方法、力学性能分析,以及成型样品缺陷表征手段,并结合数据展示图,介绍了一种新兴的断层扫描(MicroCT)样品无损表面缺陷表征手段。

Catalyst materials are widely used in industry and nearly 90% of the chemical products were produced via catalysis.Among heterogeneous catalysis,catalysts must have strong mechanical strength in order to stand for the dynamic changes of mechanical stress that might occur during reactions.Thus,to optimize the forming technology and processing parameters,the ways to characterize mechanical strength of each particle are very important for large-scale catalyst preparation.Herein,this paper clarified the type of catalysts,the way for powder forming,characterization methods for the formed catalyst and the methods to detect the strength and defects of formed catalysts.Meanwhile,it also demonstrated a novel defect detection tool(MicroCT)with recorded pictures.