Does lower energy usage mean lower carbon dioxide emissions? - A new perspective on the distillation process

다국어 초록 (Multilingual Abstract)

Although fossil fuels play an important role as the primary energy source that currently cannot be replacedeasily with other energy sources, their depletion and environmental impact are becoming major concerns. Improvementsin energy efficiency are believed to solve both problems simultaneously. We examined the relationships betweenthe improvement in energy efficiency, energy usage and CO2 emissions in industry, especially in the distillation process.
The energy efficiency improvement of dimethyl ether (DME) purification performed with dividing-wall column distillation(DWC) and acetic acid recovery performed with mechanical vapor recompression (MVR) were evaluated byrecalculating the amount of fuel burnt and its CO2 emission. The results showed that the paradigm of lower energybeing directly proportional to lower CO2 emissions is not entirely correct. To avoid this confusion, a tool for examiningthe uncommon behavior of various systems was developed.

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