Fresh, spent and dematallized spent FCCU catalysts characterized by detailed elemental analysis of powder and leachate
- Coastal Catalyst Technology, Inc., Houston, TX (United States)
Elemental analyses of spent Fluid Catalytic Cracking (FCCU) catalyst powders and leachates are necessary to characterize the total FCCU catalyst system and any potential environmental considerations. Fresh, spent, and demetallized spent FCCU catalysts were leached by various methods and in accordance with the Toxicity Characteristic Leaching Procedure (TCLP). TCLP results were compared to Land Disposal Restrictions--Phase II (LDR-II) Universal Treatment Standards (UTS). The DEMET process takes a portion of the spent catalyst and removes a portion of the metal contaminants, enabling the refiner to recycle demetallized spent FCCU catalyst, thus reducing the solid waste by on-site or off-site processing. In addition to the standard demetallization process, alternative washes provide substantial increases in conversion measured by micro-activity testing (MAT). Improved catalyst performance is evidenced after severe steaming, and physico-chemical analyses provide insight to the improved resistance to hydrothermal deactivation. Demetallization could be used for the reduction of leachable metals prior to disposal or secondary use (e.g. cement kilns); alternative processing conditions can maximize metal removal. All demetallized spent catalyst leachates are below the UTS for all elements including vanadium.
- OSTI ID:
- 126813
- Report Number(s):
- CONF-950402-; TRN: 95:006086-0842
- Resource Relation:
- Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
- Country of Publication:
- United States
- Language:
- English
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