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M. Matsumoto

Bio: M. Matsumoto is an academic researcher. The author has contributed to research in topics: Rate equation & Maleic anhydride. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

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TL;DR: In this article, experimental results showed that cyclopentadiene is oxidized by two simultaneous reactions taking place at the temperatures between 380 and 435°C, the first one giving maleic anhydride and the second one causing complete combustion, the ratio k 1/k2 depending only on the reaction temperatures.
Abstract: Experimental rate equations for reactor design have been studied. Rates of the reactions were measured over a range of concentration of cyclopentadiene, 0.2-0.4 mole%, reaction temperature, 380-435°C, flow rate of gas, 1-2m3/hr, and volume of V2O5MoO3 catalyst, 10-30cc, by means of the reactor shown in Fig. 1.Experimental results can be expressed by the equations (2), (3) and (4).From the experimental results, it is concluded that cyclopentadiene is oxidized by two simultaneous reactions taking place at the temperatures between 380 and 435°C, the first one giving maleic anhydride and the second one causing complete combustion, the ratio k1/k2 depending only on the reaction temperatures.Calculated and observed mole fractions of the cyclopentadiene used as against 2/N are plotted in Figs. 9 and 10.The longitudinal temperature profile of the catalyst bed in the tubular reactor as calculated by means of the rate equations and the heat balance equation agrees well with the observed one as shown in Fig. 11.A three-stage adiabatic converter with intercooler between catalyst beds is designed by applying the rate equations. The influence of the catalyst-bed length on the calculated reaction temperature and yield of maleic anhydride is shown in Fig. 12.

2 citations


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TL;DR: In this article, the authors have shown that the reaction follows the redox mechanism and that the additive V-Ag-O shows the highest selectivity to maleic anhydride.
Abstract: Oxidation of cyelopentadiene over vanadium oxide and its mixed oxides has been studied and correlated to changes of vanadium valence. There are various organic products containing one or two oxygen atoms besides maleic anhydride. The catalyst V-Ag-O shows the highest selectivity to maleic anhydride. The rusults indicate that the reaction follows the redox mechanism. The additives are thought to moderate the tendency of an oxide to donate its oxygen.

4 citations

Journal ArticleDOI
TL;DR: In this article, the catalytic selectivity of vanadia for selective cyclopentadiene was studied and the Mars and van Krevelen model was applied for kinetics study.
Abstract: The catalyst systems of silver-added vanadia for selective oxidation of cyclopentadiene were studied. As silver of the amount below Ag/V atomic ratio of 0.1 being added into vanadia, the catalytic selectivity for the formation of maleic anhydride was improved. This modifying effect was seemed to be related to the weakening of oxide property of vanadia with the formation of phase AgV6O{on15} in vanadium pentoxide. However, the large-amount addition of silver caused the catalyst to lose oxide property, thereby, made the catalytic selectivity poor. Mars and van Krevelen model was applied for kinetics study. The results indicate that the reoxidation of catalyst was the rate determining step and that the addition of silver lowers the activation energy in cyclopentadiene oxidation.

1 citations