Causes of catalyst deactivation during quinoline hydrodenitrogenation
Conference
·
OSTI ID:6535358
Previous studies of catalyst samples from the Wilsonville Advanced Coal Liquefaction R and D Facility have shown that the initial rapid catalyst deactivation was due to the buildup of carbonaceous deposits on the catalyst. Greater than 75% of the catalyst's hydrogenation (HYD) activity was lost as soon as coal processing began. Variations in the amount of carbonaceous deposits on the catalysts from several different Wilsonville runs, which used two different coals and three process configurations, were due to the process configuration but not the coal type. Results showed that the strong basic nitrogen compounds are most harmful to the catalyst. The current work involves determining the causes of deactivation due to hydrotreating pyridinic compounds. Quinoline was chosen as the model compound for this study because it represents a type of nitrogen compound present in coal-derived materials, and a hydrodenitrogenation (HDN) reaction network has been proposed for this compound. The initial work reported here on the causes of deactivation due to hydrogenating quinoline covers the impact of process conditions on deactivation and the determination of the effects of the reaction intermediates and products on deactivation. 9 refs., 2 figs., 3 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6535358
- Report Number(s):
- SAND-87-0270C; CONF-870802-1; ON: DE87008523
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
AZAARENES
AZINES
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
DEACTIVATION
DENITRIFICATION
DEPOSITS
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
LIQUEFACTION
MATERIALS
METALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
QUINOLINES
REACTION INTERMEDIATES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
AROMATICS
AZAARENES
AZINES
CARBONACEOUS MATERIALS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUEFACTION
DEACTIVATION
DENITRIFICATION
DEPOSITS
ELEMENTS
HETEROCYCLIC COMPOUNDS
HYDROGENATION
LIQUEFACTION
MATERIALS
METALS
MOLYBDENUM
NICKEL
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
QUINOLINES
REACTION INTERMEDIATES
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS