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Separation of Switchgrass Bio-Oil by Water/Organic Solvent Addition and pH Adjustment
- Source :
- Energy & Fuels. 30:2164-2173
- Publication Year :
- 2016
- Publisher :
- American Chemical Society (ACS), 2016.
-
Abstract
- Applications of bio-oil are limited by its challenging properties including high moisture content, low pH, high viscosity, high oxygen content, and low heating value. Separation of switchgrass bio-oil components by adding water, organic solvents (hexadecane and octane), and sodium hydroxide may help to overcome these issues. Acetic acid and phenolic compounds were extracted in aqueous and organic phases, respectively. Polar chemicals, such as acetic acid, did not partition in the organic solvent phase. Acetic acid in the aqueous phase after extraction is beneficial for a microbial-electrolysis-cell application to produce hydrogen as an energy source for further hydrodeoxygenation of bio-oil. Organic solvents extracted more chemicals from bio-oil in combined than in sequential extraction; however, organic solvents partitioned into the aqueous phase in combined extraction. When sodium hydroxide was added to adjust the pH of aqueous bio-oil, organic-phase precipitation occurred. As the pH was increased, a bi...
- Subjects :
- Aqueous solution
020209 energy
General Chemical Engineering
Inorganic chemistry
Extraction (chemistry)
Aqueous two-phase system
Energy Engineering and Power Technology
02 engineering and technology
Hexadecane
chemistry.chemical_compound
Acetic acid
Fuel Technology
020401 chemical engineering
chemistry
Sodium hydroxide
0202 electrical engineering, electronic engineering, information engineering
0204 chemical engineering
Energy source
Hydrodeoxygenation
Subjects
Details
- ISSN :
- 15205029 and 08870624
- Volume :
- 30
- Database :
- OpenAIRE
- Journal :
- Energy & Fuels
- Accession number :
- edsair.doi...........592b61a4c24700d968f8f00ab2b4a26b