Exergy-based optimization of a continuous reactor applied to produce value-added chemicals from glycerol through esterification with acetic acid

Mortaza Aghbashlo, Meisam Tabatabaei, Hajar Rastegari, Hassan S. Ghaziaskar and Elena Valijanian

Energy, 2018, vol. 150, issue C, 351-362

Abstract: The aim of this study was to develop a thermodynamic model for a better understanding of glycerol esterification process with acetic acid in a continuous reactor. Response surface method (RSM) was also used to optimize the operating conditions of the reactor applied for synthesizing acetins from the exergetic viewpoint. The effects of reaction temperature (100–140 °C), feed flow rate (0.2–0.6 mL/min), acetic acid to glycerol molar ratio (1–3), and pressure (1–160 bar) on the exergetic performance parameters of the process were studied. The optimum operating conditions of the reactor were determined by maximizing universal and functional exergetic efficiencies and minimizing normalized exergy destruction, simultaneously. Overall, RSM predicted the exergetic performance parameters of the reactor with an R2 higher than 0.98. Reaction temperature of 117 °C, feed flow rate of 0.6 mL/min, acetic acid to glycerol molar ratio of 1.1, and pressure of 1 bar yielding normalized exergy destruction of 3.1, universal exergetic efficiency of 37.5%, and functional exergetic efficiency of 20.8%, were found as the best operating conditions of the reactor. The results showed that, unlike exergy analysis, process yield (glycerol conversion) alone could not be a perfect performance metric in order to make decisions on the operating conditions of the reactor. The optimum operating conditions found in the current study could be applied at commercial scale for resource-efficient, cost-effective, and eco-friendly valorization of glycerol into acetins.

Keywords: Acetins synthesis; Continuous glycerol esterification; Exergy analysis; Response surface method; Optimization (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544218303852
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:150:y:2018:i:c:p:351-362

DOI: 10.1016/j.energy.2018.02.151

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().