Measuring surface area and acid-base of various component by chemisorption

4 Measuring surface area and acid-base of various component by chemisorption 

In the research and industrial practice of heterogeneous catalyst, measurement of the surface area of every component in multi-component catalyst is often required, but this problem is not easily solved. However, by the use of chemisorption method, measurement of the surface area of the metal components in a multi-component catalyst as well as supported catalyst can get a lot of useful information. 

According to the number of total sirrface metal atoms on catalyst as shown in equation (7.71), the surface area Sm of active component can be calculated  

In the iron catalyst, the surface area of the active phase a-Fe was measured by selective CO chemisorption at the temperatirre of hquid nitrogen (77.4 K). If the chemisorption stoichiometry of CO adsorbed for iron is one, and the surface atom density of iron (Cm,Pe) is 1.5406 x 10 , thus the sm-face area (Spe) of a-Fe is  

The basic surface areas of base metals and alkaline earth metal oxides represented by K2O were measured by selective CO2 chemisorption at the temperature of dry ice and alcohol (195.2K). If the chemisorption stoichiometry of CO2 adsorbed in K2O is two, and the surface atom density of K (Cm,K) is 1.4136 x 10 , thus the 

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