Conversion of glucose into lactic acid using silica-supported zinc oxide as solid acid catalyst

Lau, Kam Sheng and Chia, Chin Hua and Chin, Siew Xian and Chook, Soon Wei and Zakaria, Sarani and Juan, Joon Ching (2018) Conversion of glucose into lactic acid using silica-supported zinc oxide as solid acid catalyst. Pure and Applied Chemistry, 90 (6). pp. 1035-1043. ISSN 0033-4545

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Official URL: https://doi.org/10.1515/pac-2017-1005

Abstract

Zinc oxide (ZnO) has been proven to be highly effective in converting biomass into fine chemicals. It possesses several limitations, such as leaching in hydrothermal reactions and difficulty with regard to its recovery. Supporting ZnO on silica improves its recovery, stability and recyclability. In this study, we produced silica-supported ZnO by incipient wetness impregnation (IWI) method for the conversion of glucose into lactic acid. The presence of the ZnO provided active sites for isomerization to occur. The highest yield of lactic acid was 39.2 % at 180 °C for 60 min. Prolonged reaction time and higher reaction temperature promoted further degradation of lactic acid into acetic acid. The yield of lactic acid decreased after the first cycle and decreased slightly for the nine consecutive cycles.

Item Type: Article
Uncontrolled Keywords: Lactic acid; Polychar-25; Recyclability; Supported catalyst; Zinc oxide
Subjects: Q Science > Q Science (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Jun 2019 05:00
Last Modified: 26 Jun 2019 05:00
URI: http://eprints.um.edu.my/id/eprint/21548

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