Abstract
This article deals with the experimental and theoretical localization of steady state maximum temperature along an exothermic tubular reactor in counter current flow configuration; which represents a key parameter for safety in the chemical engineering processes. The fluid flowing in the inner tube is a mixture of sodium thiosulfate solution in reaction with hydrogen peroxide. To control the reactive fluid temperature, the inner tube is cooled with a refrigerant fluid flowing through the annular space. The steady state is obtained from the resolution of the nonlinear partial differential equations with the McCormack numerical method. The steady state temperature of the reactive fluid along the tubular reactor presents a maximum value due to the exothermic chemical reaction. The maximum temperature value which represents the critical point of the reactor is investigated. In particular its localization is studied for the first time according to various parameters such as flow rates, reactant concentrations and inlet temperatures.
Highlights
Catastrophic industrial accidents such as Feyzin in 1966, Seveso in 1976 (Homberger et al, 1979) [1], Bhopal in 1984 (Gupta, 1979) [2]... marked the industrial activities and have attracted attention to the hazards of chemical industries
This paper deals with the steady state maximum temperature, which represents the critical point in term of safety of the reactor, and its localization in particular is studied for the first time according to various parameters such as flow rates, reactant concentrations and inlet temperatures
The maximum temperature is an increasing linear function according to the concentration of sodium thiosulfate
Summary
Catastrophic industrial accidents such as Feyzin in 1966, Seveso in 1976 (Homberger et al, 1979) [1], Bhopal in 1984 (Gupta, 1979) [2]... marked the industrial activities and have attracted attention to the hazards of chemical industries. Maestri and Rota (Maestri, 2006) [6] have coupled the limits diagrams of reactivity versus exothermicity with temperature diagrams for thermally safe operation of liquidliquid semi batch reactors. Those diagrams make it possible to determine the increase of the maximum temperature for a certain number of operating conditions. This paper deals with the steady state maximum temperature, which represents the critical point in term of safety of the reactor, and its localization in particular is studied for the first time according to various parameters such as flow rates, reactant concentrations and inlet temperatures.
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