New Analytical Method for Maximum Temperature Assessment in an Exothermic Tubular Chemical Reactor

Abstract

This paper deals with an analytical method to assess the maximum temperature value along a tubular chemical reactor at steady state. This reactor is provided with a jacket in which a counter current cooling liquid flows.The thermal behaviour of the chemical reactor is calculated with the McCormack numerical method. Comparison of the exothermic reaction generated flux with the removed flux from the separating wall leads to a two-part reactor subdivision.In the first part, the reactor behaves as an adiabatic reactor followed by a zone in which the flux removed from the wall is not negligible and remains constant. In the second part, the reactor behaves like a simple heat exchanger without internal energy source.Analytical integration of mass and energy balance equations in each subsystem was used to determine the analytical expression of maximum temperature.

Zero-Order Versus Intrinsic Kinetics for the Determination of the Time to Maximum Rate under Adiabatic Conditions (TMRad): Application to the Decomposition of Hydrogen Peroxide

“…The study of peroxide compounds decomposition as a test system for calorimeters is frequent . For instance, the oxidation of sodium thiosulfate by hydrogen peroxide, which is a fast and exothermic reaction, is used as a model system in the field of heat transfer or thermal safety. ,− Furthermore, the use of hydrogen peroxide as an oxidizing agent in industry is growing, because it is eco-friendly. , Hydrogen peroxide is used in different fields such as waste/water/effluent treatment, paper/pulp/textile bleaching, chemical synthesis, mining/metallurgy or detergents. In 2006, the annual production was ∼2.2 million tons and 4.5 million tons in 2014 …”