Acetic Acid Recovery from Fast Pyrolysis Oil. An Exploratory Study on Liquid-Liquid Reactive Extraction using Aliphatic Tertiary Amines
| Autor: | F. H. Mahfud, F. P. van Geel, R. H. Venderbosch, Hero J. Heeres |
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| Přispěvatelé: | Engineering and Technology Institute Groningen, Chemical Technology |
| Rok vydání: | 2008 |
| Předmět: |
Tertiary amine
General Chemical Engineering Filtration and Separation reactive liquid-liquid extraction ORGANIC SOLUTIONS chemistry.chemical_compound Acetic acid REMOVAL Pyrolysis oil WATER CARBOXYLIC-ACIDS Octane flash pyrolysis FERMENTATION Chromatography biomass Process Chemistry and Technology Extraction (chemistry) Aqueous two-phase system General Chemistry acetic acid chemistry bio-oil tri-n-octyl amine Amine gas treating Pyrolysis |
| Zdroj: | Separation Science and Technology, 43(11-12), 3056-3074 |
| ISSN: | 1520-5754 0149-6395 |
| DOI: | 10.1080/01496390802222509 |
| Popis: | Flash pyrolysis oil or Bio-oil (BO), obtained by flash pyrolysis of lignocellulosic biomass, is very acidic in nature. The major component responsible for this acidity is acetic acid, present in levels up to 2-10 wt%. Here, we report an exploratory study on BO upgrading by reactive extraction of acetic acid using long-chain tertiary amines in a batch set-up. Factors affecting the extraction efficiency, such as the type and concentration of tertiary amine and co-solvents, were investigated. More than 90 wt% of the acetic acid could be extracted in a single equilibrium step (BO diluted in THF (26 wt% BO), trioctylamine (TOA) in octane as the extractant phase, T = 20 degrees C). However, the amine has considerable affinity for the BO phase and about 10 wt% on initial intake was transferred to the BO. A considerable improvement was obtained when using the aqueous phase of a thermally treated BO containing 6 wt% acid of acetic acid. In a single extraction step, acetic acid extraction efficiencies up to 75 wt% were achieved without significant amine transfer to the aqueous phase. |
| Databáze: | OpenAIRE |
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