C6+ in Recycle Gas

[10815L]

Hi,
Las two weeks we are experience for C6+ more in our reformar recycle gas.
Normal value remained below 2, but now 4. our feed distillation range is 95^0C to 170^0C.
Chloride level is good= 1.2%
Please advice me with your experience for causes and remidies.
NB:This is UOP Cyclemax CCR and platformar and catalyst is two year old.
Thanks
10815l

 

[25362]

IMHO, an equilibrium flash calculation composition on the effluent from the last reformer reactor may reveal what are the causes.

 

[Milutin]

Hi, what happens with outlet tempetature from Cold High Pressure Separator, did it increased from some reasons? This can increase heavy HC content in recycle gas.

Regards,

 

[10815L]

Hi,
No temperature rised observed, only ambient temperature is there, and this effect is always present.
One thing is notced that is only giving little clue, IBP of feed was noticed little less as compare to normal 95^0C other than this no abnormality found.
Thanks
108/15L