Now showing items 1-10 of 12
CO oxidation of Pt/Al2O3 and Pd/ Al2O3 transient response and concentration cycling studies
(Elsevier, 1986)
By combining transient response experiments with forced concentration cycling, we were able to determine the reactive surface intermediates responsible for the large rate enhancements observed during periodic operation. ...
Co oxidation on Pd/Al2O3. Transient response and rate enhancement through forced concentration cycling
(Elsevier, 1986)
Catalytic oxidation of CO over Pd/Al2O3 was studied with a novel monolithic reactor, with inside the reactor detection of reactants and products. Periodic switching of the feed between CO/N2 and O2/N2 resulted in time-averaged ...
Fractal dimensions and geometries of caves
(Kluwer Academic Publishers-Plenum Publishers; Plenum Publishing Corporation ; Springer Science+Business Media, 1986-11)
Lengths of all caves in a region have been observed previously to be distributed hyperbolically, like self-similar geomorphic phenomena identified by Mandelbrot as exhibiting fractal geometry. Proper cave lengths exhibit ...
Report on the catalytic activity of 6-heteropolymolybdates as potential Fischer-Tropsch synthesis catalysts
(Elsevier, 1986-02-14)
Unsupported and supported decomposition products of 6-heteropolymolybdates were tested as possible Fischer-Tropsch synthesis catalysts. Depending on the heteroatom, the activity changes significantly and the best supported ...
COMMENT: Comment on 'sum rules for quantum billiards'
(IOP Publishing Ltd, 1986-12-21)
Based on work of Itzykson et al., see ibid., vol.19, no.3, p.L111-16 (1986). For a d-dimensional rectangular box the function zeta (T;s) considered by Itzykson et al. is related to Epstein's zeta function and can be written ...
The efficient determination of the percolation threshold by a frontier-generating walk in a gradient
(IOP Publishing Ltd, 1986-12-21)
The frontier in gradient percolation is generated directly by a type of self-avoiding random walk. The existence of the gradient permits one to generate an infinite walk on a computer of finite memory. From this walk, the ...
Electron microdiffraction study of bimetallic Ru---Au/MgO catalysts
(Elsevier, 1986-08)
A microdiffraction study of bimetallic Ru---Au/MgO catalysts is carried out in order to discriminate between the random adsorption versus atomic ordering model proposed for the structure of bimetallic clusters. The ...
The microstructure of bimetallic Ru---Cu/SiO2 catalysts: A chemisorption and analytical electron microscopy study
(Elsevier, 1986-08)
Supported bimetallic Ru---Cu/SiO2 catalysts are characterized by transmission electron microscopy, energy dispersive X-ray spectroscopy, electron microdiffraction, and chemisorption. Metal particles up to 4 nm in diameter ...
Infrared spectroscopic study of NO reduction by H2 on supported gold catalysts
(Elsevier, 1986-11)
In situ Fourier transform infrared spectroscopy is used to study the reduction of NO by H2 on Au/SiO2 and Au/MgO catalysts. On these catalysts, large differences in selectivity toward N2 formation had been found depending ...
The influence of hydrazine reduction on metal dispersion and support morphology in bimetallic Ru---Au/MgO catalysts
(Elsevier, 1986-03)
The influence of hydrazine reduction on metal dispersion, particle size distribution, and support morphology was investigated for a series of bimetallic Ru-Au/MgO catalysts. The catalysts were prepared by impregnation of ...