Methods and reforming systems for re-dispersing platinum on reforming catalyst
AssigneeMarathon Petroleum Company LP
InventorsDavid J. Zalewski, Vidya Dharmagadda
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Abstract
Methods and systems for re-dispersing platinum on catalysts used in continuous catalyst regeneration reformer systems are disclosed. Some aspects of the disclosure provide, for example, methods of evaluating the platinum re-dispersion of a reforming catalyst in a small-scale reactor for use in a continuous catalyst regeneration reformer system and methods of improving the activity and selectivity of reforming catalysts for use in a continuous catalyst regeneration reformer system by selection of appropriate reaction parameters in a small-scale reactor for use in a continuous catalyst regeneration reformer system.
Claims20
A method of analyzing platinum re-dispersion for an activated continuous catalyst regeneration (CCR) reformer system, the method comprising:
- simulating a halogenation zone in a small-scale reactor for use by a CCR reformer system, the simulation comprising:
- (a) subjecting an activated catalyst, including platinum, to steam deactivation, thereby to agglomerate the platinum and provide an agglomerated reforming catalyst,
- (b) treating the agglomerated reforming catalyst with a chloride source, and
- (c) subjecting the treated agglomerated reforming catalyst to one or more oxychlorination conditions at least partially in the small-scale reactor, thereby to disperse the platinum agglomerate and provide a re-dispersed reforming catalyst;
- measuring an amount of platinum dispersion on a surface of the re-dispersed reforming catalyst;
- altering at least one of the one or more oxychlorination conditions within the small-scale reactor, the one or more oxychlorination conditions selected from the group consisting of time, temperature, catalyst chloride level and oxygen content, thereby to subject the re-dispersed reforming catalyst to the altering of at least one of the one or more oxychlorination conditions at least partially in the small-scale reactor;
- measuring change in the amount of platinum dispersion due to the altering of at least one of the one or more oxychlorination conditions;
- predicting an amount of platinum re-dispersion for a CCR reformer system responsive to the change in measurements of the amount of platinum dispersion from the small-scale reactor;
- and
- selecting a catalyst for use in the CCR reformer system responsive to the predicted amount of platinum re-dispersion.
A method of analyzing platinum re-dispersion for an activated continuous catalyst regeneration (CCR) reformer system, the method comprising:
- providing an agglomerated reforming catalyst, the agglomerated reforming catalyst comprising platinum agglomerate;
- treating the agglomerated reforming catalyst with a chloride source;
- subjecting the treated agglomerated reforming catalyst to one or more oxychlorination conditions at least partially in a small-scale reactor, thereby to disperse the platinum agglomerate and provide a re-dispersed reforming catalyst, the small-scale reactor configured to simulate a halogenation zone in a CCR reformer system;
- measuring an amount of platinum dispersion on a surface of the re-dispersed reforming catalyst;
- adjusting at least one of the one or more oxychlorination conditions within the small-scale reactor, the one or more oxychlorination conditions selected from the group consisting of time at a range of about 1 to about 4 hours, temperature at a range of about 400° C. to about 600° C., catalyst chloride level at a range of about 0.5 to about 1.5 wt. % Cl, and;
- subjecting the re-dispersed reforming catalyst to the adjusted at least one of the one or more oxychlorination conditions at least partially in the small-scale reactor;
- and
- measuring change in the amount of platinum dispersion due to the subjecting of the re-dispersed reforming catalyst to the adjusted at least one of the one or more oxychlorination conditions.
Dependencies are inferred from the claim text.