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This work presents a thermodynamic analysis of a cogeneration energy process with black liquor gasification obtained in pulp and paper industries, using exergy balances to identify and quantify the main irreversibilities in the process. The cogeneration process was analyzed using a commercial simulator from which it was possible to develop the exergy balance. The influence of the composition of the gases produced in the gasifier over the exergy losses in the process was evaluated. The most appropriated operating conditions in the gasifier to reduce the concentration of these components, which are responsible for the exergy losses are the low temperature (700 o C) and the low pressure (200 kPa). The analysis showed to be useful to determine the technical viability of this alternative process of energy generation using black liquor gasification.

Análisis Termodinámico de un Sistema de Cogeneración con Gasificación del Licor Negro