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四、热分析技术在催化研究中的应用 (一) 评选催化剂活性评选催化剂是催化研究中最繁重的工作,日前在很大程度上还是依靠经验和大量实践,为改变这种状态很早就有人用热分析技术。 1957年R.L Stone等人为克服D+L方法测定活性速度慢的缺点,采用了流动态差热分析法,可在五分钟内完成其活性测定。该法是以催化剂与参考物质对某种活性气体的化学吸附所产生的温差为其评选催化剂的依据。实验时将催化剂和参考物质分别放入样品池和参考池,先通惰性气体N_2,然后切换活性气体。此时由
Fourth, the application of thermal analysis technology in catalytic research (A) selection of catalyst activity Evaluation catalyst is the most arduous task of catalytic research, to a large extent, still rely on experience and extensive practice, in order to change this state some time ago Using thermal analysis techniques. 1957 R.L Stone et al. To overcome the shortcomings of the D + L method in determining the slow activity, a flow differential thermal analysis method was used to determine the activity in five minutes. The law is based on the catalyst and reference material for a certain kind of reactive gas generated by the chemical adsorption temperature difference for the selection of catalyst basis. Experiment, the catalyst and reference material were placed in the sample cell and reference pool, the first inert gas N_2, and then switch the active gas. At this point