The TPO system is typically used to quantify coke deposits in heterogeneous catalysts and also let us perform an on-line analysis of the SWNT yield in the reaction. It consists of a quartz tube containing the sample that is placed in an electric furnace while an Oxygen/He stream flows through the sample. The temperature of the oven is then linearly increased. The exit gas is sent through a catalytic methane reactor where all the CO is converted to CH4 that is finally detected by an FID detector.
This technique determines the number of reducible species present in the catalyst and the temperature at which the reduction of each species occurs .The system consists of a quartz tube containing a calcined catalyst that is placed in an electric furnace while a Hydrogen/Ar stream flows through the sample. The temperature of the oven is then linearly increased. The hydrogen uptake as a function of temperature is monitored using a thermal conductivity detector.