THAMMASAT INTERNATIONAL JOURNAL OF SCIENCE & TECHNOLOGY

Volume 24, No. 01, Month JANUARY, Year 2019, Pages 30 - 40

Pinch analysis of a sugarcane wax extraction and purification process

Nuttawee Owat, Wanwisa Skolpap

Abstract Download PDF

This work analyzes heat integration of sugarcane wax extraction in purification plants. It focuses on the development of sugarcane wax extraction from the mud of sugar mill presses, using supercritical gif.latex?CO_{2} as a solvent and ethanol as a co-solvent, with further sugarcane wax purification of 25 kg per day. To improve heat recovery for the designed heat exchanger networks (HEN), pinch analysis was applied to achieve optimal, total, external hot and cold utility demands at the optimum minimum temperature difference of gif.latex?15^{\circ&space;}C. Generated HEN alternatives were selected based on an incremental net present value (gif.latex?\DeltaNPV). Compared to the current HEN design, the most cost-effective HEN could decrease total annual costs by a factor of 1.2.

Keywords

Pinch analysis, Heat exchanger network, Sugarcane wax extraction, Supercritical CO2, Simulation

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