Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Effects of impregnation pH on the surface structure and hydrodesulfurization activity of Mo/Al/sub 2/O/sub 3/ catalysts

Journal Article · · J. Catal.; (United States)
OSTI ID:5615215

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

Use of ESCA valence bands to infer structural information about the molybdenum phase in supported molybdenum catalysts
Journal Article · Wed Dec 23 23:00:00 EST 1992 · Journal of Physical Chemistry; (United States) · OSTI ID:6568875

Characterization and HDS activity of Mo/TiO sub 2 and Ni(Co)-Mo/TiO sub 2 catalysts
Conference · Tue Mar 31 23:00:00 EST 1987 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) · OSTI ID:5276342

W-incorporated CoMo/{lambda}-Al{sub 2}O{sub 3} hydrodesulfurization catalyst. I. Catalytic activities
Journal Article · Thu Feb 29 23:00:00 EST 1996 · Journal of Catalysis · OSTI ID:263787