Modelagem e simulação de fornos de craqueamento de 1,2-dicloroetano: determinação da conversão.

Abstract

Vinyl Chloride Monomer (MVC) is produced from the thermal cracking of the 1.2 Dicloroethane (1.2 EDC). The molecule of MVC is formed by the removal an atom of Hydrogen and another of Chlorine of the molecule of 1.2 EDC, that subsequently combine for produce also a molecule of Chloridirc acid. Beyond these products, also occurs the formation of diverse byproducts such as Chloroprene, Benzene and Organic substances with low Hydrogen atoms number (coke). The coke itself deposit into the coil furnace and it is responsible by the: i) Elevation of pressure in feed furnace, influenced by the accumulation of coke and by others parameters, such as feed of EDC, conversion and, mainly, temperature, or ii) punctual Elevation of temperature, due to the diminution of the thermal conductivity of the pipes. These two parameters, intimate related, healthy crucial in the determination of the stop of operation of the ovens for the achievement of the operation of decoke, therefore the deposit of coke affects the speed in the pipes (time of residence/conversion), affects the transference of heat (temperature/conversion), among others. The effect of the each agent isolated is not known quantitative. One of the way for the acquisition of this knowledge is the construction of a model of the trial, confronting it with the results of an industrial furnace. The model developed in this research has like objective foresees the conversion of the 1,2 EDC, providing a better accompaniment of the equipment. The even it was adjusted from facts of trial collected in industrial unit.