Transesterification of acid soybean oil for biodiesel production using lithium metasilicate catalyst prepared from diatomite
| Autor: | Ying Chen Chen, Dai Ying Lin, Bing Hung Chen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Lithium metasilicate
Biodiesel Acid value food.ingredient 020209 energy General Chemical Engineering food and beverages 02 engineering and technology General Chemistry Transesterification 021001 nanoscience & nanotechnology Soybean oil chemistry.chemical_compound Oleic acid food chemistry Biodiesel production 0202 electrical engineering electronic engineering information engineering Organic chemistry Methanol 0210 nano-technology |
| Zdroj: | Journal of the Taiwan Institute of Chemical Engineers. 79:31-36 |
| ISSN: | 1876-1070 |
| DOI: | 10.1016/j.jtice.2017.05.001 |
| Popis: | Production of biodiesel from acid soybean oil using lithium metasilicate and its mixtures with zeolite ABW as catalysts was studied. Lithium metasilicate (Li2SiO3) and zeolite ABW were synthesized hydrothermally at 150 °C for one day by using diatomite and LiOH(aq) as starting materials. These solid catalysts were employed successfully to catalyze transesterification of acid soybean oil in excess methanol at 60 °C for biodiesel production. The soybean oil was spiked with oleic acid to obtain an acid value of 0.54 mg KOH/g oil, i.e. 3.6 times higher than the Taiwan's legal limit on the acid value of refined edible soybean oil (CNS 749). Consequently, the yields of biodiesel were above 95% in an hour by using lithium metasilicate catalysts. Furthermore, the spent catalysts of could be recycled and reused for at least for three consecutive cycles without significant deactivation observed in catalysis. With a decreasing loading of catalyst-to-oil to 30 wt%, the yield of biodiesel could still reach ca. 95% in one hour at 60 °C. |
| Databáze: | OpenAIRE |
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