Methane Conversion by Oxidative Processes: Fundamental and by J. H. Lunsford (auth.), E. E. Wolf (eds.)

By J. H. Lunsford (auth.), E. E. Wolf (eds.)

A average case may be made that the medical curiosity in catalytic oxidation used to be the foundation for the popularity of the phenomenon of catalysis. Davy, in his test in 1817 to appreciate the technological know-how linked to the security lamp he had invented many years past, undertook a sequence of stories that led him to make the statement jet of gasoline, essentially methane, may reason a platinum twine to proceed to glow even if the flame was once extinguished and there has been no seen flame. Dobereiner said in 1823 the result of an identical research and saw that spongy platina may reason the ignition of a movement of hydrogen in air. in keeping with this statement Dobereiner invented the 1st lighter. His lighter hired hydrogen (generated from zinc and sulfuric acid) which omitted finely divided platinum and which ignited the fuel. millions of those lighters have been used over a few years. Dobereiner refused to dossier a patent for his lighter, commenting that "I love technology greater than money." Davy concept the motion of platinum was once the results of warmth whereas Dobereiner believed the ~ffect ~as a manifestation of electrical energy. Faraday got interested within the topic and released a paper on it in 1834; he concluded that the reason for this response used to be just like different reactions.

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Extra info for Methane Conversion by Oxidative Processes: Fundamental and Engineering Aspects

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In Proceedings of the 9th International Congress on Catalysis, ed. J. Phillips and M. Ternan, pp. 968-73. Ottawa: The Chemical Institute of Canada. J. Tench. 1968. The reaction of hydrogen atoms at oxide surfaces. Chern. Commun. 1113-14. J. A. M. P. Withers. 1987. Catalytic oxidative dimerization of methane over sodium-promoted Mn/Si0 2 and MnjMgO. Preprints, Div. Petro. , Am. Chern. Soc. 32:763. H. Lunsford. 1990. Gas-phase coupling of methyl" radicals during the partial oxidatio:J of methane over transition metal oxide catalysts.

Throughout this chapter, conversion is defined as the amount of carbon converted to products divided by the amount of carbon in the feed, selectivity is defined as the percentage of carbon converted to a particular product divided by the total amount of carbon converted, and yield is the product of selectivity and methane conversion. 4 for the catalytic experiments; and temperatures were in the range of 650-850°C. The total pressure was slightly higher than 1 atm. Specific conditions used in a given set of experiments are described in the corresponding figure caption.

On the other hand, selectivity increased with the degree of lithium loading. The results summarized here were obtained at conditions where the influence of gas-phase reactions on C 2 hydrocarbons yield was not important. 4 so that according to the previous studies gas-phase conversion was minimized. 6% NajNiTi0 3 (Miro, Santamaria, and Wolf 1990a; Miro et al. 1990) and for the different loadings of the LijLa 2 0 3 • 2Ti0 2 (Kalenik and Wolf 1991), respectively. The results reveal a general trend 46 I /FUNDAMENTALS 40 (a) :;?

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