Process and Energy Intensification of Glycerol Carbonate Production from Glycerol and Dimethyl Carbonate in the Presence of Eggshell-Derived CaO Heterogeneous Catalyst

Abstract

The process and energy intensifications for the synthesis of glycerol carbonate (GC) from glycerol and dimethyl carbonate (DMC) using an eggshell-derived CaO heterogeneous catalyst were investigated. The transesterification reaction between glycerol and DMC was typically limited by mass transfer because of the immiscible nature of the reactants. By varying the stirring speed, it was observed that the mass transfer limitation could be neglected at 800 rpm. The presence of the CaO solid catalyst made the mass transport-limited reaction process more prominent. Mass transfer intensification using a simple kitchen countertop blender as an alternative to overcome the external mass transfer limitation of a typical magnetic stirrer was demonstrated. A lower amount of the catalyst and a shorter reaction time were required to achieve 93% glycerol conversion or 91% GC yield, and the turnover frequency (TOF) increased almost 5 times from 1.5 to 7.2 min−1 when using a conventional magnetic stirrer and countertop blender, respectively. In addition, using a simple kitchen countertop blender with 7200 rpm, the reaction temperature of 60 °C could be reached within approximately 3 min without the need of a heating unit. This was the result of the self-frictional heat generated by the high-shear blender. This was considered to be heat transfer intensification, as heat was generated locally (in situ), offering a higher homogeneity distribution. Meanwhile, the trend toward energy intensification was promising as the yield efficiency increased from 0.064 to 2.391 g/kJ. A comparison among other process intensification techniques, e.g., microwave reactor, ultrasonic reactor, and reactive distillation was also rationalized.

Publication DOI: https://doi.org/10.3390/en14144249
Divisions: College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Chemical Engineering & Applied Chemistry
Additional Information: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). Funding: This research was funded by the Thailand Research Fund (Research and Researchers for Industrials PhD Program: Grant No. PHD 57I0078) and Verasuwan Co., Ltd.
Uncontrolled Keywords: Biomass waste derived catalyst,Fatty acid methyl ester (FAME),Glycerol carbonate production,Mass and heat transfer,Process intensification,Renewable Energy, Sustainability and the Environment,Fuel Technology,Energy Engineering and Power Technology,Energy (miscellaneous),Control and Optimization,Electrical and Electronic Engineering
Full Text Link:
Related URLs: https://www.mdp ... 1073/14/14/4249 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-07-14
Accepted Date: 2021-07-06
Authors: Praikaew, Wanichaya
Kiatkittipong, Worapon
Aiouache, Farid
Najdanovic-Visak, Vesna (ORCID Profile 0000-0002-1035-0982)
Ngaosuwan, Kanokwan
Wongsawaeng, Doonyapong
Lim, Jun Wei
Lam, Su Shiung
Kiatkittipong, Kunlanan
Laosiripojana, Navadol
Boonyasuwat, Sunya
Assabumrungrat, Suttichai

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