Zobrazeno 1 - 10
of 240
pro vyhledávání: '"Wolfgang M.H. Sachtler"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 109:81-86
The chemisorption of H2 and of CO and the catalysis of neopentane conversion have been studied on two groups of Y-zeolite-supported Pd samples. One group was prepared under conditions which result in the formation of “grape-shaped” Pd particles f
Publikováno v:
Applied Catalysis B: Environmental. 90:120-125
Temperature programmed depletion (TPD) was performed for both surface nitrates (H + –NO 3 − ) and surface nitrites (H + –NO 2 − ) on Na-Y. The depletion curves are each adequately described with a pre-exponential of 10 13 and activation energ
Publikováno v:
Journal of Catalysis. 265:54-62
Ni-, Cu-, and Fe-loaded acidic and basic Y zeolites were synthesized, and their catalytic properties for oxidative dehydrogenation of ethane (ODHE) to ethylene were characterized. Acidic Ni-loaded Y zeolite exhibits an ethylene productivity of up to
TPD of nitric acid from BaNa–Y: evidence that a nanoscale environment can alter a reaction mechanism
Publikováno v:
Phys. Chem. Chem. Phys.. 11:1180-1188
The mechanism of temperature-programmed desorption (TPD) of nitric acid chemisorbed on BaNa-Y was studied over the temperature range from 200 to 400 degrees C, in the presence and absence of CO. Nitric acid dissociates to form H(+) and NO(3)(-) when
Publikováno v:
Catalysis Today. 136:55-63
The selective reduction of NO x with added oxygenates over BaNa/Y and Ag/Y zeolites and Ag/γ-Al 2 O 3 takes place via complex reaction pathways with a number of common crucial intermediates. Acetate ions are formed by the oxidation of acetaldehyde o
Publikováno v:
Applied Catalysis B: Environmental. 81:251-257
Ammonium nitrate is thermally stable below 250 °C and could potentially deactivate low temperature NO x reduction catalysts by blocking active sites. It is shown that NO reduces neat NH 4 NO 3 above its 170 °C melting point, while acidic solids cat
Publikováno v:
Catalysis Letters. 118:173-179
Nitromethane (NM) is a very efficient reductant for converting NO2 to N2 over Ag/Y: Between 140 °C and 400 °C, the N2 yield is close to 100%. This high N2 yield results from the ability of Ag/Y to effectively catalyze the reaction between NM and NO
Publikováno v:
Journal of Catalysis. 246:413-427
A multistep mechanism has been elucidated for the reduction of NO x in the presence of ethanol over silver-exchanged zeolite Y (Ag/Y). Ethanol reacts with O 2 and/or NO 2 to form acetaldehyde at temperatures as low as 200 °C. Surface acetate ions, f
Publikováno v:
Catalysis Letters. 112:129-132
Contact of adsorbed ammonium nitrite, NH4NO2, with HCl vapor or a solid acid such as the zeolite HY, significantly lowers the temperature of its decomposition to N2 + H2O. Protonated NH4NO2 decomposes at room temperature. The decomposition of ammoniu
Publikováno v:
Journal of Catalysis. 238:100-110
A multistep mechanism has been elucidated for the reduction of NOx in the presence of added ethanol over Ag/γ-Al2O3 at 320 °C. Under these conditions, ethanol principally reacts with oxygen to form acetaldehyde. Surface acetate ions, which are form