1-Butyl-3-methylimidazolium hydrogen sulfate catalyzed in-situ transesterification of Nannochloropsis to fatty acid methyl esters
| Autor: | Tapaswy Muppaneni, Zheling Zeng, Harvind K. Reddy, Jun Wang, Yingqiang Sun, Peter H. Cooke, Shuguang Deng |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Biodiesel
Hydrogen Renewable Energy Sustainability and the Environment 020209 energy Inorganic chemistry Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Transesterification Catalysis Solvent chemistry.chemical_compound Fuel Technology Nuclear Energy and Engineering chemistry Biodiesel production Ionic liquid 0202 electrical engineering electronic engineering information engineering Methanol |
| Zdroj: | Energy Conversion and Management. 132:213-220 |
| ISSN: | 0196-8904 |
| DOI: | 10.1016/j.enconman.2016.10.071 |
| Popis: | 1-Butyl-3-methylimidazolium hydrogen sulfate ([Bmim][HSO4]) is used as a solvent and an acid catalyst for in-situ extractive transesterification of wet Nannochloropsis with methanol. The reaction is supposed to be a five-step process: (1) wet algae cell wall dissolves in ionic liquid at reaction temperatures; (2) hydrogen ions and sulfate ions release from the ionization of HSO4−. The hydrogen ions (H+) act as catalysts for accelerating the reactive extraction of triglyceride from wet Nannochloropsis; (3) hydrogen ions and methanol molecules transfer from bulk to active site of cells without passing through cell wall that is dissolved by ionic liquid; (4) in-situ transesterification of lipid (mainly triglycerides) with methanol; and (5) products transfer from inside of algae cells to outside of cells. The crude biodiesel yield of [Bmim][HSO4] catalyzed in-situ transesterification is about 95.28% at reaction temperature of 200 °C, reaction time of 30 min, mass ratio of [Bmim][HSO4] to wet Nannochloropsis of 0.9:1, and a mass ratio of methanol to wet algae of 3:1. It decreases to 81.23% after [Bmim][HSO4] is recycled for 4 times, which indicates that [Bmim][HSO4] catalyzed in-situ transesterification is an economic approach for biodiesel production from wet algae. |
| Databáze: | OpenAIRE |
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