Published October 1983 | Version v1
Journal article Metadata-only

Characterization of alumina supported molybdenum catalysts

Creators

  • 1. Instituto Militar de Engenharia, Rio de Janeiro (Brazil). Secao de Quimica

Description

In order to optimize a bifunctional catalyst (acid and hydrogenating) of Mo/Al2O3, oxygen adsorption at 195 K and ethanol dehydration at 480-520 K were carried out using a series of these catalysts. The increase of Mo content increased the quantity of adsorbed oxygen, thus indicating that the number of hydrogenating sites also increased. The specific activity of ethanol dehydration varied slightly, indicating that the number of acid sites remains almost constant. On the other hand, the selectivity in ethylene (versus ether) increased markedly. This may be attributed to the increase in acid force of the acid sites. (C.L.B.)

Abstract (Portuguese)

Para otimizar um catalisador bifuncional (acido e hidrogenante) de Mo/Al2O3, adsorcao de oxigenio a 195 K e desidratacao de etanol a 480-520 K foram feitas sobre uma serie destes catalisadores. O aumento do teor de Mo aumentou a quantidade de oxigenio adsorvido, indicando que o numero de sitios hidrogenantes tambem aumentou. A atividade especifica de desidratacao do etanol teve pouca variacao, indicando que o numero de sitios acidos fica aproximadamente constante. Ao contrario, a seletividade em etileno (versus eter) aumentou marcadamente. Isso pode ser atribuido ao aumento de forca acida dos sitios acidos. (Autor)

Additional details

Additional titles

Original title (Portuguese)
Caracterizacao de catalisadores de molibdenio suportado sobre alumina

Publishing Information

Journal Title
Rev. Bras. Apl. Vacuo
Journal Volume
3
Journal Issue
1-2
Series
Rev. Bras. Apl. Vacuo.
Journal Page Range
71-77
ISSN
0101-7659

Conference

Title
4. Brazilian Congress of Vacuum Applications in the Industry and in the Science.
Dates
18-20 Jul 1983.
Place
Sao Jose dos Campos, SP (Brazil).

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
16016873
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ADSORPTION; ALUMINIUM OXIDES; CATALYSTS; CHEMICAL PROPERTIES; DEHYDRATION; ETHANOL; MOLYBDENUM; OXYGEN; PH VALUE; THERMODYNAMIC ACTIVITY
Descriptors DEC
ALCOHOLS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; ELEMENTS; HYDROXY COMPOUNDS; METALS; NONMETALS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; TRANSITION ELEMENTS