Showing papers on "Cobalt sulfide published in 1972"

Electrochemical oxygen detector

Abstract: AN ELECTROCHEMICAL OXYGEN DETECTOR WHICH IS USEFUL IN A SULFUROUS ENVIRONMENT CONTAINS A METAL SULFIDE, SUCH AS NICKEL, TUNGSTEN OR COBALT SULFIDE, AS A CATHODE. THE ANODE IS DESIRABLY SILVVER SULFIDE. A DETECTOR HAVING A NICKEL SULFIDE OR A TUNGSTEN SULFIDE CATHODE AND A SILVER SULFIDE ANODE IS READILY FORMED DURING USE IN A POLLUTED ENVIRONMENT FROM A DETECTOR HAVING A NICKEL OR A TUNGSTEN CATHODE AND A SILVER ANODE WITHOUT SUBSTANTIAL VARIA- TION IN RESPONSE CHARACTERISTICS. THE ELECTRLYTE IS DESIRABLY POTASSIUM CHLORIDE IN WATER CONTAINING A CHELATING AGENT FOR REDUCIBLE METAL IONS, FOR EXAMPLE SODIUM POTASSIUM TARTRATE, A BUFFER TO MAINTAIN THE PH IN EXCESS OF 5, AND A DELIQUESCENT AGENT, E.G. A MIXTURE OF POTASSIUM DIHYDROGEN PHOSPHATE AND DISODIUM HYDROGEN PHOSPHATE DIHYDRATE.

The Catalytic Hydrogenolysis Reaction of Dibenzothiophene

Abstract: The hydrogenolysis reaction of dibenzothiophene over molybdenum sulfide, tungsten sulfide, cobalt sulfide, and nickel sulfide catalysts were studied by means of a batch method.From the experimental results, the following conclusions were obtained.1) The hydrogenolysis activity was in the following order:Molybdenum sulfide>Tungsten sulfide>Cobalt sulfide>Nickel sulfide2) The formation reaction of biphenyl and the consecutive reaction in which hydrogenation and cracking proceed competitively occur simultaneously.3) The hydrogenolysis activity of dibenzothiophene is varied by the amount of hydrogen sulfide which is related to the equilibrium of molybdenum disulfide and molybdenum trisulfide.4) The active sites for the hydrogenation of the aromatic nucleus are different from the sites for the cleavage of c-s bond.