Integrated glycerol- and ethanol-based chemical synthesis routes using Cu–Mg–Al LDH-derived catalysts without external hydrogen: Intervention of bio-ethanol co-fed with glycerol

Jirayu Kuljiraseth, Thanakorn Kumpradit, Tuangrat Leungcharoenwattana, Yingyot Poo-arporn and Sirirat Jitkarnka

Renewable Energy, 2020, vol. 156, issue C, 975-985

Abstract: In order to secure the feed, a bio-based chemical production plant shall be designed to process more than one bio-based feedstock. However, the process usually requires costly H2 supply. Without H2 feeding, the effects of Cu on Cu0.3Mg1.7Al-LDO catalysts were investigated on the hydrogenolysis of glycerol with and without bio-ethanol co-feeding. As a result, the reduced catalyst dramatically increased the glycerol conversion and gave an apparently-high selectivity of chemicals such as 1,2-propandiol, ethyl lactate, and lactic acid. Apparently, besides as a hydrogen donor, ethanol also acted as a reactant that produced ethyl lactate via the esterification with lactic acid. In summary, Cu2+ and Cu+ sites promoted glycerol dehydration, the oxidation to lactic acid, and the esterification with ethanol to ethyl lactate whereas Cu0 was believed to promote the in-situ hydrogen formation from glycerol reforming. The integrated reaction pathways were also proposed and discussed.

Keywords: Glycerol; Bio-ethanol; Hydrogenolysis; 1,2-Propandiol; Ethyl lactate (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:156:y:2020:i:c:p:975-985

DOI: 10.1016/j.renene.2020.04.151

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