Refining the glycerin phase from palm-oil biodiesel by ion-exchange with cationic resins
| Autor: | Fernando Cardeño López, Luis Javier Gallego Morales, Luis A. Rios |
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| Rok vydání: | 2013 |
| Předmět: |
Biodiesel
Chromatography Materials science Ion exchange Renewable Energy Sustainability and the Environment General Chemical Engineering Organic Chemistry Pulp and paper industry Pollution law.invention Inorganic Chemistry chemistry.chemical_compound Fuel Technology chemistry law Glycerol Freundlich equation Methanol Ion-exchange resin Waste Management and Disposal Distillation Biotechnology Refining (metallurgy) |
| Zdroj: | Journal of Chemical Technology & Biotechnology. |
| ISSN: | 0268-2575 |
| DOI: | 10.1002/jctb.4054 |
| Popis: | Background Glycerin is produced as an 11% by-product in biodiesel manufacturing. Impurities are concentrated in the glycerin phase. High-vacuum distillation of glycerin is an energy-intensive process. A new low-cost purification strategy for glycerin is needed. This paper reports the refining of the glycerin phase obtained from palm-oil biodiesel synthesis by ion-exchange with cationic resins. In the literature and to the best of the authors' knowledge, the use of a real glycerin phase from biodiesel has not been reported. The ion-exchange equilibrium was determined in a batch process, while variables for the industrial scaling-up were studied in continuous operation. Results The sodium content obtained with low amounts of resin is lower than that obtained with mineral-acid refining. Almost complete sodium removal could be achieved in continuous operation. Langmuir and Freundlich models give a good fit to the equilibrium data. Amberlyst was the best resin. Breakthrough capacity was 96% of static exchange capacity. 95% of the static ion exchange was recovered by washing with water-soap. Conclusion A 96.6% purification level of glycerol was obtained with the resin Amberlyst 15, using a methanol content of 60%, liquid phase flow of 0.8 mL min−1 and 0.3 g resin g−1 glycerin phase; dynamic exchange capacity was 96% of the static exchange capacity. Exchange capacity is almost completely regenerated by washing with water-soap. © 2013 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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