Zobrazeno 1 - 10
of 165
pro vyhledávání: '"H. Ehwald"'
Publikováno v:
Kinetics and Catalysis. 45:209-214
H–D tracer experiments during n-octane aromatization on Cr2O3/La2O3/ZrO2 catalysts allow conclusions to be drawn on the reaction mechanism. The rate-determining step is the dissociative adsorption of the paraffin molecule. The following dehydrogena
Publikováno v:
Topics in Catalysis. 13:281-285
Two sulfated zirconia samples have been synthesized using different preparation procedures. Textural and acid properties of these catalysts have been characterized and compared with commercial zeolite Hβ by means of nitrogen low-temperature adsorpti
Autor:
U. Leibnitz, H. Ehwald
Publikováno v:
Catalysis Letters. 38:149-155
The hydrogen chemisorption on Pt/Al2O3 was investigated by temperature programmed desorption. The activation energy of desorption strongly depends on the hydrogen surface coverage. The chemisorption process is shown to be activated. High temperature
Publikováno v:
Applied Catalysis. 76:153-169
Multipromoted Rh-Mn-Li/SiO2 and Rh-Ir-Mn-Li/SiO2 catalysts for the selective hydrogenation of carbon monoxide to oxygenates have been combined with a selective hydrogenation component CuO-ZnO/SiO2 to produce ethanol with high activity and selectivity
Publikováno v:
Catalysis Today. 24:243-244
Activation of C n H 4 (n = 1,2) and H 2 on MgO, elucidated by new isotopic method, proceeds as a results of reversible adsorption with extraction of one atom H.
Publikováno v:
Zeitschrift für Physikalische Chemie. :1161-1172
Publikováno v:
Reaction Kinetics and Catalysis Letters. 35:173-184
The conversion of methanol into light olefins has been studied using the silver salt of dodecatungstosilicic acid supported on serosil. Special attention has been paid to the process of the acid sites formation during the initial reaction period and
Publikováno v:
Reaction Kinetics and Catalysis Letters. 40:31-34
Promoting effects of hydrogen and oxygen on the homoexchange rate of ethylene over highly dispersed silver catalysts has been established. On bulk silver no homoexchange is observed under the same conditions.
Publikováno v:
Applied Catalysis. 34:23-38
The conversion of methanol to hydrocarbons was investigated on alumina-supported H 4 [SiW 12 O 40 ] catalysts. Depending on the concentration of the heteropoly compound, two different types of [SiW 12 O 40 ] 4− anions exist on the surface of the ca