The activities of manganese nodules (Mn-N) and manganese-iron mixed oxide for decomposition of isopropyl alcohol

Journal Article · Fri Oct 13 04:00:00 EDT 1978 · J. Catal.; (United States)

OSTI ID:6971234

Matsuo, K; Nitta, M; Aomura, K

Mn-N collected from the ocean floor contained 14Vertical Bar3< Mn, 12.91Vertical Bar3< Fe, 18.57Vertical Bar3< acid insolubles (silica and aluminosilicate), and Vertical Bar3; 0.5Vertical Bar3< each of cobalt, nickel, copper, and other impurities. They were crushed, calcined at 200/sup 0/-600/sup 0/C, and tested for the conversion of isopropanol in helium. The surface area of Mn-N calcined at 200/sup 0/-300/sup 0/C was approx. 300 sq m/g, and it decreased at higher calcination temperatures. Maximum conversion was obtained on the Mn-N calcined at 400/sup 0/C, which gave acetone with approx. 75Vertical Bar3< selectivity at approx. 60Vertical Bar3< conversion, and carbon dioxide. The conversion and selectivity pattern was similar for pure precipitated manganese oxide, and it differed for pure precipitated iron oxide by forming propylene instead of carbon dioxide as the minor product. The surface areas of these pure metal oxides were much smaller than that of Mn-N. Precipitated manganese-iron mixtures with the appropriate metal additives duplicated the activity and surface area of the Mn-N. The oxidation process which produced carbon dioxide and water probably used excess surface oxygen of the catalyst.

• Research Organization: Hokkaido Univ.
• OSTI ID: 6971234
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 54:3; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical &amp; Physicochemical Properties
400301* -- Organic Chemistry-- Chemical &amp; Physicochemical Properties-- (-1987)
ALCOHOLS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
ELEMENTS
HIGH TEMPERATURE
HYDROXY COMPOUNDS
IRON COMPOUNDS
IRON OXIDES
MANGANESE COMPOUNDS
MANGANESE OXIDES
METALS
MINERALS
MIXTURES
ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PROPANOLS
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SURFACE AREA
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YIELDS