PETR 94 |
| Hydrotreating catalysts for fixed bed reactor deactivate mainly due to the coke deposition. Therefore, the deactivated catalysts can be regenerated by coke burning in the off-site oven. However, in the case of residue hydroprocessing catalyst (ARDS catalyst), only small part can be regenerated because of the metal poisoning. For these several years, Idemitsu has been successfully applying our original developed ARDS catalysts (named RH910/RH920). The pore diffusion model can predict the deactivation by calculating the change of the pore mouth diameter at increasing vanadium accumulation. The model leads to the conclusion that about 40% catalysts could be regenerated. However, it was restricted to be only 20% due to the loss of catalyst strength. From XRD analysis, it was found that the formation of Al2(SO4)3 decreases the strength of alumina carrier, and the addition of alkali earth group metal prevents the damage and improves the catalyst strength. |
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2nd International Symposium on Hydrotreating/Hydrocracking Technologies
1:30 PM-4:10 PM, Tuesday, 12 September 2006 Palace -- Presidio Room, Oral
Division of Petroleum Chemistry |