Fluid cracking conversion level

Table V. Effect of Conversion Level in Fluid Catalytic Cracking Using ...

Effect of Conversion Level Fluid Cracking with Silica-Alumina Catalyse... 

Depending on tlie time. scale of deactivation, the catalytic activity can be restored in different ways. For example, in fluid catalytic cracking, where the deactivation is very fast, a recirculating leacTor is used for continuous catalyst regeneration. However, if the deactivation is slow and constant conversion is desired 10 meet certain environmental regulations as in VOCoxidation, the temperature level can be used to compensate fur the loss of intrinsic catalytic activity. Under such additions, the deactivation effects are measured by the temperature increase required to maintain constant conversion. 

The first three samples in Table 4 are ECO cuts from the FCC (fluid catalytic cracking) process. They all have relatively low levels of olefins (between 2.0 and 4.5wt% determined by SPE). Conversion of the Bromine numbers to olefin content by using high (2.9) and low (1.8) ratio values produced results that were close to those experimentally found by the SPE... 

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