Indexed by:期刊论文

Date of Publication:2022-07-03

Journal:化学工程

Affiliation of Author(s):化工学院

Issue:4

Page Number:67-69,78

ISSN No.:1005-9954

Abstract:Venting design of reaction runaway is the key to prevent pressure vessels from overpressure resulting from exothermic runaway reaction. The determination of the most dangerous scenario is essential in the runaway reaction venting design approach. Cyclohexanone ammoximation is an important process for producing chemical materials. Whereas, exothermic runaway may occur in the cyclohexanone ammoximation reaction. In order to obtain the most dangerous scenario, six dangerous scenarios probably taking place in the cyclohexanone ammoximation process were determined. The experimental schemes were discussed corresponding to each scenario. The calorimeter experiments in all schemes were conducted by using Venting Sizing Package 2(VSP2) adiabatic calorimeter. The results demonstrate that the cyclohexanone ammoximation reaction is an intensive exothermic process. The temperature in reaction system can rise up to 200��C instantaneously. No secondary exothermic reaction is detected when increasing temperature after the first reaction runaway. Hydrogen peroxide with excessively high concentration is deemed as the worst case scenario, and this scenario should be adopted in the runaway reaction venting design. It is suggested that the feeding line of hydrogen peroxide should be mainly inspected to prevent the reaction from runaway.

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