FTIR studies of hydrocarbon synthesis on Pd/ZSM5 catalysts. Quarterly progress report

Technical Report · Fri Feb 15 04:00:00 EST 1985

OSTI ID:6100763

Wolf, E E

During the past quarter two tasks were accomplished: (i) a high pressure infrared reactor was built, tested, and modified accordingly, and (ii) the Pd/ZSM5 catalyst was prepared and characterized, and the low pressure spectrum of CO on this and other catalysts was obtained. The infrared spectrum of CO adsorbed on the Pd-ZSM5 catalyst, appears much different than the spectrum of Pd supported on silica previously discussed. In the ZSM5 support, the bridge bonded species is the main band with the linear structure reduced to a small shoulder in the spectrum. Furthermore, the frequency of the bridge bonded structure is significantly shifted to a lower value at 1867 cm/sup -1/. The other band at 2353 cm/sup -1/ corresponds to CO/sub 2/ since this particular spectrum was collected during reaction with oxygen. The spectrum in the absence of oxygen, retains its bridge bond characteristic. The conclusions to be drawn from this preliminary data is that, indeed as previously shown for the CO methanation reaction, the ZSM5 zeolite provides a metal support interaction which affects the state of the Pd surface and shifts the CO bond to a lower frequency. As expected CO in the presence of low pressure H/sub 2/ yields mainly methane. 3 references, 4 figures.

• Research Organization: Notre Dame Univ., IN (USA). Dept. of Chemical Engineering
• DOE Contract Number: FG22-84PC70788
• OSTI ID: 6100763
• Report Number(s): DOE/PC/70788-2; ON: DE85007239
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
CHEMICAL REACTORS
CONSTRUCTION
DATA
DESIGN
ELEMENTS
EXPERIMENTAL DATA
FOURIER TRANSFORMATION
INFORMATION
INFRARED SPECTRA
INORGANIC ION EXCHANGERS
INTEGRAL TRANSFORMATIONS
ION EXCHANGE MATERIALS
MATERIALS
METALS
METHANATION
MINERALS
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
RESEARCH PROGRAMS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SORPTION
SORPTIVE PROPERTIES
SPECTRA
SURFACE PROPERTIES
SYNTHESIS
TRANSFORMATIONS
TRANSITION ELEMENTS
ZEOLITES