Characteristics of a commercially aged Ni-Mo/Al2O3 hydrotreating catalyst: component distribution, nature of coke and effects of regeneration

Thesis/Dissertation · Sun Jan 01 00:00:00 EST 1984

OSTI ID:6170653

Bogdanor, J M

Information concerning the morphology and behavior of active components on commercially aged catalyst, the effects of regeneration conditions on activity, and insights into the nature of coke and contaminant metal deposits could lead to improved catalysts and operating conditions , yielding significant economic returns. Spent Ni-Mo/Al2O3 hydrotreating catalyst from a commercial hydrotreater was examined using TGA, SEM, STEM, XPS, and a microreactor. Information concerning intraparticle distributions of active components, characteristics of the coke and metal deposits, and catalytic activity for fresh, spent and regenerated catalyst was used to draw general conclusions concerning hydrotreating catalyst deactivation. It was found that catalytic activity was reduced and the nature of the hydrogenation function was altered due to bulk migration and agglomeration of molybdenum. This process was found to be accelerated by high-temperature regeneration. Results also indicated that iron deposits might catalyze formation of coke. Tentative generalizations and suggestions on improved reactor operation are presented.

• Research Organization: Texas Univ., Austin (USA)
• OSTI ID: 6170653
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CATALYSTS
DEACTIVATION
REGENERATION
HYDROGENATION
CATALYSIS
MOLYBDENUM
NICKEL
CHEMICAL REACTORS
COKE
COKING
EXPERIMENTAL DATA
PHOTOELECTRON SPECTROSCOPY
SCANNING ELECTRON MICROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
THERMODYNAMIC ACTIVITY
TRANSMISSION ELECTRON MICROSCOPY
X RADIATION
ALUMINIUM COMPOUNDS
CARBONIZATION
CHALCOGENIDES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
DATA
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
ELEMENTS
GRAVIMETRIC ANALYSIS
INFORMATION
IONIZING RADIATIONS
METALS
MICROSCOPY
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
RADIATIONS
SPECTROSCOPY
THERMAL ANALYSIS
TRANSITION ELEMENTS
010403* - Coal & Coal Products- Hydrogenation- (-1987)