Zobrazeno 1 - 10
of 129
pro vyhledávání: '"M. Albert Vannice"'
Autor:
M. Albert Vannice
Publikováno v:
Catalysis Today. 123:18-22
An analysis of the “mechanism” and the assumptions incorporated into the derivation of the Mars–van Krevelen rate expression for heterogeneously catalyzed oxidation reactions reveals a number of inconsistencies. The expression as derived is pro
Autor:
M. Albert Vannice, Samrat Mukherjee
Publikováno v:
Journal of Catalysis. 243:131-148
The initial liquid-phase reaction to hydrogenate any of the three unsaturated bonds in the citral molecule can be described by a Langmuir–Hinshelwood (LH) mechanism that assumes that molecular citral and H atoms are the two most abundant reaction i
Autor:
M. Albert Vannice, Adrian David
Publikováno v:
Journal of Catalysis. 237:349-358
Heterogeneous catalysis, which is being used more frequently in the fine chemicals industry, does not always provide the desired selectivity because various functional groups become labile to reduction by hydrogen on a noble metal under similar react
Publikováno v:
The Journal of Physical Chemistry B. 109:2086-2092
Acetone hydrogenation was studied over a family of Cu/SiO2 catalysts as well as UHP Cu powder and a Cu chromite catalyst. Oxygen chemisorption via dissociative N2O adsorption was used to count surface Cu atoms and calculate crystallite sizes, and a m
Publikováno v:
Journal of Catalysis. 222:214-226
After exposure to 1,3-butadiene, unpromoted Ag/ α -Al 2 O 3 and Ag/ α -Al 2 O 3 promoted with Cs and Cl were characterized using DRIFTS. Weakly adsorbed molecular butadiene was the dominant species for all samples regardless of the adsorption tempe
Publikováno v:
Journal of Catalysis. 217:442-456
Nitric oxide was used to probe Ag/ α -Al 2 O 3 epoxidation catalysts. NO dissociated on reduced silver catalysts to oxidize metallic silver sites and desorb N 2 O at 300 K. Uptake measurements and DRIFTS results showed that AgO sites were the pri
Publikováno v:
Journal of Catalysis. 214:292-307
NO reduction by CH 4 over a 40% La 2 O 3 / γ -Al 2 O 3 catalyst in the absence and presence of O 2 in the feed was studied. The addition of either CO 2 or H 2 O to the feed produced a reversible inhibitory effect on the rate similar to that observed
Publikováno v:
Korean Journal of Chemical Engineering. 20:247-255
Not only was the surface site density in a 0.78% Pt/SiO2 catalyst determined by using selective chemisorption techniques, but the surface chemistry related to decompositive N2O adsorption on the Pt surface was also described byin situ DRIFTS techniqu
Publikováno v:
Journal of Catalysis. 213:305-320
CO was used to probe the nature of adsorption sites on Ag/ α -Al 2 O 3 epoxidation catalysts and to investigate the effect of Cs and Cl promoters by employing diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and chemisorption mea
Autor:
Willy Rachmady, M. Albert Vannice
Publikováno v:
Journal of Catalysis. 209:87-98
Vapor-phase acetic acid hydrogenation was studied over a family of supported Pt–Fe catalysts. These catalysts were characterized by Mossbauer spectroscopy, successive H 2 –O 2 –H 2 –O 2 titration cycles at 300 K, and DRIFTS (diffuse reflectan