By D.D. Eley, Herman Pines, Paul B. Weisz (Eds.)
(from preface)There were many demanding situations in our decade to associations, customs, principles, to just about every thing that has grown and gathered over such a lot of human generations. This contains the practices of the medical neighborhood, of educating, and of study. within the arguments in regards to the reasons and merits of clinical endeavors, these in catalysis haven't been neglected. certainly, they just isn't, for catalysis is unavoidably a phenomenon of the maximum significance to society. it will possibly offer, actually, a fantastic enviornment for all types of routines referring to ''relevance.''
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Extra info for Advances in Catalysis, Vol. 24
The power-law equation was also used. For each single reaction we determined 12-30 values of the initial reaction rates (according to the complexity of the presumed mechanisms), using several different combinations of partial pressures of the reactants. The data obtained were treated by a combined method of linear and nonlinear regression (‘7) using a computer. The relations which did not satisfy even the intentionally chosen very low regression coefficient as a criterion of linear regression were rejected; the remaining ones were then treated by nonlinear regression, the values obtained in linear regression being used as the first estimates.
From the study of coupled reactions it may be therefore assumed that adsorption-desorption steps in the studied transformation of xylenes are not, very likely, rate determining, which is, after all, in agreement with the form of the rate equations (17) obtained by a statistical treatment of initial rate data on isolated reactions. C. CONSECUTIVE HYDROGENATION OF PHENOL A procedure similar to that used in the investigation of the hydrodemethylation of xylenes was also employed in a study of the consecutive hydrogenation of phenol via cyclohexanone to cyclohexanol in gaseous phase on a platinum on silica gel catalyst (p.
The BET surface area was 870 m2/g. Prior to kinetic measurements, the catalyst was modified by passing over acetic acid vapors (100 g acid/l g catalyst). 4 meq/g of -SOsH groups. It was dried prior to using a t 90°C/14 Torr. The BET surface area, determined in a dry state, was 49 m2/g, and the mean pore size was around 100 A. A platinum-iron on silica gel catalyst was prepared by impregnating silica gel (BDH, for chromatographic adsorption) with an aqueous solution of chloroplatinic acid (analytical grade) and sodium hydroxide (analytical grade).
Advances in Catalysis, Vol. 24 by D.D. Eley, Herman Pines, Paul B. Weisz (Eds.)