Mechanism of hydrodenitrogenation H{sub 2}-D{sub 2} exchange in reduced molybdenum catalysts. Ninth quarterly report, October 1--December 31, 1991

Technical Report · Tue Dec 31 04:00:00 EST 1991

DOI:https://doi.org/10.2172/10167069· OSTI ID:10167069

Miranda, R

Diffuse reflectance infrared spectroscopy was used to study the deuterium exchangeability of reduced molybdena catalysts supported on silica, alumina and 75% silica-alumina. It was found that silica hydroxyls react partially with deposited molybdena. The new species formed does not lead to regeneration of hydroxyl on the catalyst. On the other hand, the interaction of molybdena with alumina or silica-alumina leads to the generation of interfacial OH groups, that compensate for the hydroxyls lost to reaction. In this project is a proposed that the selectivity of the Hydrodenitrogenation (HDN) reaction can be affected by an alteration of the catalyst acidity since it is possible that an acidic Hofmann-like deamination pathway is operative (1) in parallel with the hydrogenolysis of saturated C--N--C bonds. Such was the conclusion from the study done of the denitrogenation of piperidine (3), where it was demonstrated that Bronsted acid sites are active for the denitrogenation of N-heterocycles where as Lewis sites are not.

• Research Organization: Louisville Univ., KY (United States). Dept. of Chemical Engineering
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-89PC89771
• OSTI ID: 10167069
• Report Number(s): DOE/PC/89771--9; ON: DE92018436
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
DEUTERIUM
HETEROCYCLIC COMPOUNDS
HYDROXY COMPOUNDS
INFRARED SPECTROMETERS
LIQUID FUELS
MOLYBDENUM OXIDES
ORGANIC NITROGEN COMPOUNDS
PROGRESS REPORT
PURIFICATION
PURIFICATION AND UPGRADING
REMOVAL
SILICON OXIDES