Thermal Decomposition of 1-Pentene
| Autor: | Kinoshita Hisao, Haruo Shibatani |
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| Rok vydání: | 1973 |
| Předmět: | |
| Zdroj: | NIPPON KAGAKU KAISHI. :336-342 |
| ISSN: | 2185-0925 0369-4577 |
| DOI: | 10.1246/nikkashi.1973.336 |
| Popis: | Thermal decomposition of 1-pentene was studied in a flow apparatus under an atmospheric pressure, at temperatures ranging from 480 to 750C, with residence times from 0.05 to 48 sec and nitrogen/1-pentene mole ratios of 6 and 15. The overall reaction was fourid to obey the first order rate equation with the rate constant ef log k (sec)=12.2-52000/4.575T. The reaction products were, in the decreasing order, ethylene, propene, butadiene, 1-butene, methane, ethane, hydrogen, 1, 5-hexadiene and 1, 3-pentadiene. More ethylene and propene were formed at higher temperatures and lower partial pressure of 1-pentene, while the amount of butadiene was found to decrease under these conditions.The main reaction can beL accounted for by the free-radical chain process in which decomposition and isomerization of alkenyl as well as alkyl radicals compete. The experimentally observed product distributions as well as reaction rates generally agreed with those calculated by the proposed chain scheme. lt is found, however, that ethylene and propene are formed not only through chain process but also via molecular proess or direct fission of 1-pentene, The latter reaction becomes more important at lower temperatures. At 500C, the centribution of this reaction is estimated to be about 20%e cf the total decomposition. |
| Databáze: | OpenAIRE |
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