Sampling systems abnormal responses

These diffusion limitations are particularly pronounced with HMORIO (Si/Al ratio of 10) catalysts, which can be explained by the quasi absence of mesopores (26, 27). With the other samples and especially with HMOR90, mesopores created by dealumination allow a quasi tridimensional diffusion of organic molecules in the pore system, decreasing or suppressing diffusion limitations. These diffusion limitations are also responsible for the abnormally low value of TOF per protonic site found with HMORIO catalysts for hydrodealkylation and for disproportionation, i.e. for the other primary reactions involving acid catalytic sites. 

---