论文部分内容阅读
我们实验室曾详细研究了作为氨氧化催化剂的La_(L-x)Ca_xMnO_3系复合氧化物的制备、性质和缺陷作用.水工作用TPD法考察了催化剂经过高温氨氧化反应后表面氧的变化,以及这些变化和组成的关系. TPD在流动法装置中进行,以经过脱氧和干燥的氦作载气,用热导地检测氧的脱出.样品采用已报导过的催化剂,粒度30—60目,用量约为0.5克.(1)氧顶处理样品的TPD:将称量的烘干样品,在装置中以干燥的高纯氧在700℃下处理1小时后冷至室
In our laboratory, the preparation, properties and defects of La_ (Lx) Ca_xMnO_3 composite oxide as ammoxidation catalyst have been studied in detail.Water-based TPD method has been used to investigate the surface oxygen changes after high temperature ammoxidation of catalysts, Change and composition of the relationship between the TPD in the flow method device to carry out the dehydrogenation and drying of helium as a carrier gas to detect the thermal conductivity of oxygen projectile samples have been reported using a catalyst particle size of 30-60 mesh, Of 0.5 g. (1) TPD of oxygenated sample: The weighed dried sample was treated in a device with dry high purity oxygen at 700 ° C. for 1 hour and cooled to room temperature