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• W2797545932 abstract "Methyl esters of fatty acids are widely used as biodiesel, a sustainable replacement for petro-diesel. The conventional biodiesel process produces crude glycerol, which constitutes about 10 wt% of the total products. This has led to a surplus of crude glycerol due to global increase in biodiesel use, necessitating increased research into sustainable processes that could convert the crude glycerol into higher value-added products. This study investigates biodiesel processes for continuous transesterification of triglycerides to methyl esters, coupled to conversion of the glycerol by-product into solketal, a value-added product, via reaction with acetone in situ. The study was carried out using one-stage and two-stage catalytic transesterification of triacetin and methanol in mesoscale oscillatory baffled reactors (meso-OBRs). The two-stage process involved two meso-OBRs in series packed with AmberlystTM resin catalysts: a basic AmberlystTM A26-OH in the first stage to catalyse transesterfication of triacetin with methanol, and an acidic AmberlystTM 70-SO3H in the second stage to catalyse the coupling of glycerol and acetone to form solketal. One-stage triacetin transesterification and glycerol coupling with acetone was carried out in a meso-OBR packed with the acidic AmberlystTM 70-SO3H resin. In the two-stage process, the triacetin was converted to 99.1 ± 2.0% methyl acetate and 98.0 ± 1.3% glycerol after 25 min residence time in the first reactor and the glycerol was reacted with acetone in the second reactor to achieve 76.5 ± 2.8% solketal conversions after 35 min. The single-stage process achieved 48.5 ± 2.7% solketal conversion after 30 min. The meso-OBR was operated continuously to achieve high quality steady states and consistent triacetin conversions. The triglyceride transesterification with reactive coupling of glycerol with acetone produces less crude glycerol by-product. This process strategy could be optimised for future biodiesel production." @default.
• W2797545932 created "2018-04-24" @default.
• W2797545932 creator A5033850764 @default.
• W2797545932 creator A5084357353 @default.
• W2797545932 date "2018-09-01" @default.
• W2797545932 modified "2023-09-30" @default.
• W2797545932 title "Continuous reactive coupling of glycerol and acetone – A strategy for triglyceride transesterification and in-situ valorisation of glycerol by-product" @default.
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• W2797545932 doi "https://doi.org/10.1016/j.cej.2018.04.078" @default.
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