Improvement of the Butyl acetate (cas 123-86-4) process through heat integration: A sustainability-based assessment

Add time:09/10/2019    Source:sciencedirect.com

The heat integration of a conventional and a reactive distillation technologies for Butyl acetate (cas 123-86-4) production is studied in this work. Different configurations were evaluated and compared to the original designs in terms of their sustainable performances. The comparison was carried out through the Eco-efficiency Comparison Index method by determining six ecological indicators (raw materials consumption, fuel consumption, energy consumption, CO2 emissions, water consumption and wastewater generation), five economic indicators (specific raw materials cost, specific energy cost, specific water cost, liquid waste cost fraction and yield factor) and three safety indicators (safety hazard fire/explosion, chemical exposure index and chronic toxicity factor). The heat integration proved to be a convenient strategy since it significantly improved the conventional and reactive distillation processes’ eco-efficiencies. While the reactive distillation technology has a 53% higher environmental performance than the conventional route, the former’s integrated arrangement increases its eco-efficiency up to 62% when compared to the latter. Finally, we propose new intensified flowsheets for both the conventional and reactive distillation schemes, being the latter approximately 49% more sustainable than the former.

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