It is routinely necessary to replace catalysts that have lost their activity. This is often also necessary outside the planned replacement cycle, for example when the catalyst has been deactivated prematurely by penetration of pollutants. It is then necessary to cool the reactor with the catalyst quickly and safely, to remove the catalyst under controlled conditions, to fill in a new catalyst and to heat the reactor again as quickly as possible so that it can start working again. This is a job for Catcool. The program developed by Linde makes it possible to calculate the cooling and reheating time of a catalytic reactor and to determine the quantity of nitrogen needed for this. Apart from data on heat transmission, many empirical values have also been incorporated in the program so that realistic values are calculated.
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