Catalytic isomerization of olefins on molybdena, I

Halász, I.; Gáti, Gy.

doi:10.1007/bf02098324

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…The activity of Y 211 is almost twice that of Y 123 . Previous work [15] showed that the nonconducting cuprate Y 211 was also twice as active as the superconducting Y 123 which is in agreement with our results. It has been reported that Cu 2+ is present in Y 211 which is responsible for the higher catalytic activity [7,16] compared with Y 123 in which only Cu 3+ is present.…”

Section: Resultssupporting

confidence: 96%

Enhancement of the catalytic activity of [Cu2(TS)(OH)2(OAc)] using superconductor cuprate sample

Hamada

El-Shafai

El‐Asmy

2006

Transition Met Chem

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A superconducting sample (Nd 0.1 Y 0.9 Ba 2 Cu 3 O 7-d ) has been tried as a catalyst for H 2 O 2 decomposition. All parameters affecting the reaction rate (concentration of H 2 O 2 , weight of catalyst, temperature and pH) were studied and the optimum conditions were evaluated. A mixture of the superconducting cuprate with [Cu 2 (TS)(OH)(OAc)] using different percentages of the sample has been prepared and tried kinetically under the same mentioned conditions. An attempt was made to increase the activity of the complex. The data show that the cuprate sample alone was found to be almost inactive when compared with that of the mixture. The catalytic mechanism in the absence and presence of the complex was suggested.

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Section: Resultssupporting

confidence: 96%

Enhancement of the catalytic activity of [Cu2(TS)(OH)2(OAc)] using superconductor cuprate sample

Hamada

El-Shafai

El‐Asmy

2006

Transition Met Chem

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“…The products observed were CO 2, CO, H 2 O, and H2. On tracing the water profile it could be inferred that in the case of Y123 the reaction commences at 220~ whereas the temperature is lowered by as much as 70~ in the case of Pr123, At 350~ CO 2 is the major product, while CO predominates at 550~ Formation of formaldehyde at about 300~ was not observed as reported in an earlier study for a similar stoichiometric oxidation of methanol over Y123 in the presence of nitrogen carrier gas (Halasz 1989). However, they report the absence of formaldehyde at higher temperatures.…”

Section: Oxidation Of Methanol Over Y123 and Pr123supporting

confidence: 48%

Design and fabrication of an automated thermal desorption gas-solid reaction system: Oxidation of ammonia and methanol over YBa2Cu3O7−δ(123) oxide systems

Hegde

Ramesh

1992

Proc. Indian Acad. Sci. (Chem. Sci.)

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A fully automated, versatile Temperature Programmed Desorption (TDP), Temperature Programmed Reaction (TPR) and Evolved Gas Analysis (EGA) system has been designed and fabricated. The system consists of a micro-reactor which can be evacuated to 10-6 torr and can be heated from 30 to 750~ at a rate of 5 to 30~ per minute. The gas evolved from the reactor is analysed by a quadrupole mass spectrometer (1-300 amu). Data on each of the mass scans and the temperature at a given time are acquired by a PC/AT system to generate thermograms. The functioning of the system is exemplified by the temperature programmed desorption (TPD) of oxygen from YBa2Cu3_xCoxO 7 + 6, catalytic ammonia oxidation to NO over YBa2 Cu3 07-~ and anaerobic oxidation of methanol to CO2, CO and H20 over YBa2CuaOT-~ (Y123) and PrBa2Cu307_8 (Pr123) systems.

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“…YBa2Cu2CoO6+x préparé à l'air, a = 3,88, c = [2], methane [3] and carbon monoxide [4]. The reaction CO + NO ~ 1/2 N2 + C02, which is of interest in connection with catalytic exhaust converters, has also been reported to be catalyzed by YBa2Cu3O6+x [5].…”

mentioning

confidence: 99%