Alkaline hydrothermal conversion of glycerin into lactic acid

Zheng Shen, Fangming Jin, Yalei Zhang, Ashushi Kishita, Kazuyuki Tohji, Hisanori Kishida

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationAmerican Chemical Society - 236th National Meeting and Exposition, Abstracts of Scientific Papers
Publication statusPublished - 2008 Dec 1
Event236th National Meeting and Exposition of the American Chemical Society, ACS 2008 - Philadelpia, PA, United States
Duration: 2008 Aug 172008 Aug 21

Other

Other236th National Meeting and Exposition of the American Chemical Society, ACS 2008
CountryUnited States
CityPhiladelpia, PA
Period08/8/1708/8/21

Keywords

  • Alkaline
  • Glycerin
  • Hydrothermal reaction
  • Lactic acid

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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  • Cite this

    Shen, Z., Jin, F., Zhang, Y., Kishita, A., Tohji, K., & Kishida, H. (2008). Alkaline hydrothermal conversion of glycerin into lactic acid. In American Chemical Society - 236th National Meeting and Exposition, Abstracts of Scientific Papers