Accelerated aging tests with a resid hydrotreating catalyst
- Phillips Petroleum Co., Bartlesville, OK (USA)
The deactivation rate of a resid hydrotreating catalyst is determined by a complex set of factors involving both chemical and physical changes in the catalyst structure. The various chemical changes that are associated with resid conversion involve thermal and catalytic steps of relatively large molecular weight species with the overall rates significantly affected by mass transfer limitations. The deposition of coke and the variation in the effective promoter level by the accumulation of metals deposited from the resid are the principal factors governing deactivation. The relative importance of mass transfer restrictions on activity and catalyst deactivation can be observed in studies where the average pore diameter of the catalyst has been varied. Several models have been proposed to characterize the deactivation of resid hydroprocessing catalysts. In this paper, the authors discuss some accelerated aging tests with a relatively large pore commercial hydrotreating catalyst used in their refinery hydrotreater. The activity for sulfur and metals removal from a refinery resid was monitored as a function of catalyst age in a normal life test and in two runs where the catalyst was prematurely aged by exposure to either Maya or Hondo 400 F+ resids. The results illustrate the importance of the various factors governing catalyst deactivation and the limitations in predicting catalyst life from accelerated aging tests.
- OSTI ID:
- 5111608
- Report Number(s):
- CONF-8704349-; CODEN: ACPCA
- Journal Information:
- American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA), Vol. 32:2; Conference: Symposium on advances in resid upgrading, Denver, CO (USA), 5-10 Apr 1987; ISSN 0569-3799
- Country of Publication:
- United States
- Language:
- English
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