Abstract
An alkaline hydrothermal treatment of glycerin, a byproduct of the biodiesel fuel manufacturing process, was carried out by using different alkaline catalysts. All experiments were performed in a batch reactor made of stainless steel 316 tubing (12.7-mm o.d., 1-mm wall thickness and 111-mm long) with two end fittings, providing an inner volume of 10 mL. An excellent lactic acid yield of about 90% was obtained by alkaline hydrothermal treatment of glycerin. The effectiveness of using alkaline metals hydroxides for promoting the production of lactic acid was much higher than using alkali-earth metals hydroxides. The effectiveness of KOH for promoting the production of lactic acid was higher than using NaOH. The condition for getting the highest yield of lactic acid when using KOH as an alkaline catalyst is softer than using NaOH.
| Original language | English |
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| Title of host publication | American Chemical Society - 236th National Meeting and Exposition, Abstracts of Scientific Papers |
| Publication status | Published - 2008 Dec 1 |
| Event | 236th National Meeting and Exposition of the American Chemical Society, ACS 2008 - Philadelpia, PA, United States Duration: 2008 Aug 17 → 2008 Aug 21 |
Other
| Other | 236th National Meeting and Exposition of the American Chemical Society, ACS 2008 |
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| Country/Territory | United States |
| City | Philadelpia, PA |
| Period | 08/8/17 → 08/8/21 |
Keywords
- Alkaline
- Glycerin
- Hydrothermal reaction
- Lactic acid
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)