Kinetic determination of the energies of bonds formed by H, C, and O Atoms with A V2O3 catalyst
- 20 Downloads
An investigation was made of the activity of vanadium oxides in the dehydrogenation of cyclohexane, and the dehydrogenation and dehydration of ethyl and isopropyl alcohols. It was found that the relative dehydrogenating and hydrogenating capacity of vanadium oxides increases in the case of both alcohols and hydrocarbons as they are reduced to V2O2, and is maximal for V2O3. Corresponding samples were investigated by x-ray diffraction methods.
Over the temperature range 450–500°, vanadium trioxide produces dehydrogenation of cyclohexane with up to 10% conversion and, in contrast to vanadium pentoxide, it produces hardly any side processes (the gas consists of 97–99% H2). The activation energy of this reaction was determined.
Vanadium trioxide has a dehydrogenating and a dehydrating action on alcohols and there is a secondary reaction with the hydrogen formed. The activation energies for the dehydrogenation and dehydration of ethyl and isopropyl alcohols were calculated, considering two possible mechanisms for this secondary reaction. The activation energies for the reactions of the two alcohols were found to be similar, which is in agreement with the multiplet theory of catalysis.
The energies of the bonds of H, C, and O atoms with the catalytically active centers of vanadium trioxide were determined.
KeywordsEthyl Activation Energy Hydrocarbon Vanadium Dehydration
Unable to display preview. Download preview PDF.
- A. A. Balandin, Zhur. Obshch. Khim.16, 793 (1946).Google Scholar
- P. Sabatier, Catalysis in Organic Chemistry [Russian translation] (Goskhimtekhizdat, Moscow, 1932).Google Scholar
- Italian Pat. 351120 05.21 (1937); Italian Pat. 352327 06.19 (1937): Universal Oil Product Co. French Pat. 825816; Chem. Abs.32, 6664 (1938); J. G. Wulf fand A. G. Farbenindustrie; German Pat.596094,05 (1934).Google Scholar
- A. V. Lozova, S. A. Senyavin, and A. B. Vol'-Épshtein, Zhur. Priklad. Khim.28, 175 (1955).Google Scholar
- G. D. Lyubarskii and M. Ya. Kagan, Doklady Akad. Nauk SSSR29, 574 (1940).Google Scholar
- B. A. Kazanskii, A. F. Platé, T. F. Bulanova, and N. D. Zelinskii, Doklady Akad. Nauk SSSR27, 658 (1940).Google Scholar
- E. F. G. Herington and E. K. Rideal, Proc. Roy. Soc.A184, 434, 447 (1945).Google Scholar
- K. A. Briggs and H. S. Taylor, J. Am. Chem. Soc.63, 2500 (1941).Google Scholar
- A. F. Platé, Catalytic Aromatization of Paraffinic Hydrocarbons [in Russian] (Izd. AN SSSR, Moscow-Leningrad, 1948).Google Scholar
- A. F. Platé and G. A. Tarasova, Zhur. Obshchei Khim.13, 21, 36 (1943).Google Scholar
- A. F. Platé and O. D. Sterligov, Zhur. Obshchei Khim.13, 202 (1943).Google Scholar
- A. F. Platé and G. A. Tarasova, Zhur. Obshchei Khim.15, 118 (1945).Google Scholar
- H. S. Taylor and L. M. Yeddanapalli, Bull. Soc. Chim. Belg.47, 162 (1938).Google Scholar
- A. A. Balandin and N. P. Egorova (Sokolova) Doklady Akad. Nauk SSSR57, 255 (1947).Google Scholar
- V. I. Komarewsky, C. F. Price, and K. J. K. Coley, J. Am. Chem. Soc.69, 238 (1947).Google Scholar
- H. A. Doyal and O. W. Brown, J. Phys. Chem.36, 1549 (1932).Google Scholar
- V. A. Komarov and N. P. Timofeeva, Zhur. Obshchei Khim.26, 3306 (1956).Google Scholar
- V. I. Komarewsky and D. Miller, Adv. in Catalysis9, 707 (1957).Google Scholar
- C. T. H. Stoddart and C. Kemball, J. Coll. Sci.11, 532 (1956).Google Scholar
- A. A. Balandin, Izvest. Akad. Nauk SSSR, Otdel. Khim. Nauk 25 (1942).Google Scholar
- A. A. Balandin and A. A. Tostopyatova, Zhur. Fiz. Khim.30, 1367 (1956).Google Scholar
- Cottrell, Strength of Chemical Bonds [Russian translation] (IL, Moscow, 1956).Google Scholar