FTIR study and catalyst characterization of the No-Co reaction over Pt/WO/sub 3//SiO/sub 2/ catalysts

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:6852175

Regalbuto, J R

One of today's most pressing problems in air pollution is the control of nitrogen oxide emission. Nearly half of all NO emission is produced by automobiles; to detoxify automotive exhaust, NO is reduced with CO over supported catalysts containing noble metals such as Pt and Rh. The choice of tungsten trioxide (WO/sub 3/) as a promoter of Pt for the NO-CO reaction was made to try to improve the catalyst's activity toward NO dissociation, which is the rate determining step of the reaction at conditions of practical interest. The study of the fundamental role of WO/sub 3/ in the promotion of Pt/SiO/sub 2/ catalysts for the NO-CO reaction took two directions. On one hand, the NO-CO reaction kinetics and mechanism were investigated using transient, in-situ FTIR experiments. On the other hand, the promoted and unpromoted catalysts were characterized by the techniques of x-ray diffraction (XRD), chemisorption, x-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM).

• Research Organization: Northwestern Univ., Evanston, IL (USA). Technological Inst.
• OSTI ID: 6852175
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
AIR POLLUTION
ATMOSPHERIC CHEMISTRY
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
CHEMISTRY
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
METALS
MICROSCOPY
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PLATINUM
PLATINUM METALS
POLLUTION
RHODIUM
SCATTERING
SEPARATION PROCESSES
SORPTION
SPECTROSCOPY
TRANSITION ELEMENTS
TRANSMISSION ELECTRON MICROSCOPY
TUNGSTEN
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY