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Works: 3 works in 3 publications in 1 language and 3 library holdings
Publication Timeline
Experimental evaluation of precious metal carbon dioxide catalysts( Book )

1 edition published in 1967 in English and held by 1 WorldCat member library worldwide

A study was undertaken for the development of a catalyst for the Sabatier carbon dioxide methanation reaction. This reaction is used in an oxygen recovery process for space capsules. The best catalyst developed consists of 20% ruthenium supported on alumina spheres of 70 to 100 m sq/g surface area. Conversions of 99% and higher were reached with such catalysts at space velocities up to 10,000 per hr when using 10% stoichiometric excess hydrogen and temperatures of 470 to 530 F. The carbon monoxide concentration of the dry product gas can, under the same conditions, be kept at 10 ppm. At lower and higher temperatures, the conversions decline because of kinetic and thermodynamic limitations, respectively. A catalyst of the same type was run continuously for 3,024 hours at a space velocity of 500 per hour and a temperature of 527 F without any noticeable decline in the 99+% conversion to methane while using 10% excess hydrogen in the feed. (Author)

1 edition published in 1966 in English and held by 1 WorldCat member library worldwide

A study was carried out on fuel cell catalyst carriers used in oxidation of hydrocarbons. The carriers studied were graphite, boron carbide, and because of its specific grain structure industrial diamond. The crystallite sizes of the applied noble metal and its distribution on the carrier were determined by X-ray and electron micrographic techniques. It has been demonstrated that whereas certain carriers may assure the deposition of platinum with the desired small crystallite size, they may not be able to retain it on their surface in a uniformly distributed fashion. At an unfavorable and low surface area of the carrier the noble metal may agglomerate or even separate from the carrier. The anodic oxidation of propane and of carbon monoxide containing hydrogen has been studied on supported catalyst. For both types of fuel utilization of precious metal is improved by dispersing the metal on a carrier. Of the carriers tested, graphite was found to be the best carrier for the oxidation of propane. Alloying supported platinum with ruthenium is particularly beneficial for the oxidation of carbon monoxide containing hydrogen. On the cathode the amount of precious metal needed for a given current output could not be substantially decreased by the use of catalysts on carrier. (Author)
Improved coatings from organometallic solutions( Book )

1 edition published in 1966 in English and held by 1 WorldCat member library worldwide

Research was continued with the object of applying a known method of obtaining thin films by organometallic solution decomposition, to new materials of interest for environmental protection and temperature control. The thickness of the films is in the range of 500 Angstroms to four microns. Nickel films, free of impurities, have been obtained reproducibly. Aluminum and chromium films have been obtained, together with carbon, and neither varied firing cycles nor potential catalysts proved effective in preventing formation of carbon. Nickel aluminide intermetallics have been obtained together with other phases; the reason for this non-homogeneity has been found. Two forms of chromium carbide, Cr23C6 and Cr7C3 have been obtained substantially free of other phases. Materials commonly used as anti-reflection coatings (MgF2,La2O3,CeO2) have been applied on glass by thermal decomposition of organic solutions at 500 C in air. A non-destructive technique for predicting final film thickness by measurement of the unfired film is described. (Author)
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