Effects of impregnation pH on the surface structure and hydrodesulfurization activity of Mo/Al/sub 2/O/sub 3/ catalysts
- Univ. of Pittsburgh, PA
A series of Mo/Al/sub 2/O/sub 3/ (molybdenum/alumina) catalysts was prepared by incipient wetness impregnation at various pH's (4.0, 5.4, 7.1, and 11.0) using a fixed amount of Mo (8% Mo). The effect of pH on the state and dispersion of Mo species in the dried, calcined, and reduced catalysts was investigated by the combined use of two surface sensitive techniques: X-ray photoelectron spectroscopy (XPS, ESCA) and ion scattering spectroscopy (ISS). The surface properties were correlated to thiophene hydrodesulfurization activities for the various catalysts. A tentative interpretation of the influence of pH of the Mo impregnating solution on the surface structure of Mo/Al/sub 2/O/sub 3/ catalysts at various stages of their preparation is proposed. 8 figures, 1 table.
- OSTI ID:
- 5615215
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 83:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Characterization and HDS activity of Mo/TiO sub 2 and Ni(Co)-Mo/TiO sub 2 catalysts
W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities
Related Subjects
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYSTS
CATALYTIC EFFECTS
CATIONS
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DATA
DESULFURIZATION
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY
EXPERIMENTAL DATA
FLUIDS
GASES
HELIUM
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HIGH VACUUM
HYDROGEN
IMPREGNATION
INFORMATION
ION SCATTERING ANALYSIS
IONS
KINETICS
LOW PRESSURE
MEDIUM TEMPERATURE
METALS
MOLYBDENUM
NONDESTRUCTIVE ANALYSIS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PH VALUE
PHOTOELECTRON SPECTROSCOPY
POWDERS
PRESSURE DEPENDENCE
RARE GASES
REACTION KINETICS
REDUCTION
SPECTROSCOPY
SULFIDATION
SURFACE AREA
SURFACE PROPERTIES
SYNTHESIS
TEMPERATURE DEPENDENCE
THIOPHENE
TIME DEPENDENCE
TRANSITION ELEMENTS