Published

2015-05-01

Stability criteria and critical runway conditions of propylene glycol manufacture in a continuous stirred tank reactor

Criterios de estabilidad y condiciones críticas de runaway de la producción de propilenglicol en un reactor continuo de tanque agitado

Keywords:

stability criteria, propylene oxide, propylene glycol, runaway conditions. (en)
Criterios de estabilidad, óxido de propileno, propilen glicol, condiciones de runaway. (es)

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Authors

  • Miguel Ángel Gómez National University of Colombia, Manizales
  • Sandra Milena López Zamora National University of Colombia, Manizales
  • Isabel Dobrosz Gómez National University of Colombia, Manizales

Here, a new method for the analysis of the steady state and the safety operational conditions of the hydrolysis of propylene oxide with excess of water, in a Continuous Stirred Tank Reactor (CSTR), was developed. For industrial operational typical values, at first, the generated and removed heat balances were examined. Next, the effect of coolant fluid temperature in the critical ignition and extinction temperatures (TCI and TCE, respectively) was analyzed. The influence of the heat exchange parameter (hS) on coolant and critical temperatures was also studied. Finally, the steady state operation areas were defined. The existence of multiple stable states was recognized when the heat exchange parameter was in the range 6.636 < hS kJ/(min.K) < 11.125. Unstable operation area was located between the TCI and TCE values, restricting the reactor operation area to the low stable temperatures.

En este trabajo se presenta un nuevo método para el análisis del estado estable y de las condiciones operativas seguras para la hidrólisis del óxido de propileno con exceso de agua en un reactor continuo de tanque agitado (CSTR). Inicialmente, para valores típicos de operación industrial, se examinaron los balances de calor generado y removido. Luego, se analizó el efecto de la temperatura del fluido de enfriamiento en las temperaturas de ignición y extinción (TCI y TCE, respectivamente). También se estudió el efecto del parámetro de transferencia de calor (hS) sobre las temperaturas críticas y del fluido de enfriamiento. Finalmente, se definieron las áreas de operación estables. Se reconoció la existencia de múltiples estados estables cuando el parámetro de transferencia de calor está en el intervalo de 6.636 < hS kJ/(min.K) < 11.125. El área de operación inestable está localizada entre los valores de TCI y TCE, restringiendo la operación del reactor al área de bajas temperaturas estables.


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Copyright (c) 2015 Miguel Ángel Gómez, Sandra Milena López Zamora, Isabel Dobrosz Gómez

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