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

Kam Sheng Lau, Chin Hua Chia, Siew Xian Chin, Soon Wei Chook, Sarani Zakaria, Joon Ching Juan

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)1035-1043
Number of pages9
JournalPure and Applied Chemistry
Volume90
Issue number6
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Zinc Oxide
Lactic acid
Zinc oxide
Silicon Dioxide
Glucose
Lactic Acid
Silica
Catalysts
Acids
Recovery
Isomerization
Acetic acid
Impregnation
Acetic Acid
Leaching
Biomass
Degradation
Temperature

Keywords

  • Lactic acid
  • Polychar-25
  • Recyclability
  • Supported catalyst
  • Zinc oxide

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Conversion of glucose into lactic acid using silica-supported zinc oxide as solid acid catalyst. / Lau, Kam Sheng; Chia, Chin Hua; Chin, Siew Xian; Chook, Soon Wei; Zakaria, Sarani; Juan, Joon Ching.

In: Pure and Applied Chemistry, Vol. 90, No. 6, 01.01.2018, p. 1035-1043.

Research output: Contribution to journalArticle

Lau, Kam Sheng ; Chia, Chin Hua ; Chin, Siew Xian ; Chook, Soon Wei ; Zakaria, Sarani ; Juan, Joon Ching. / Conversion of glucose into lactic acid using silica-supported zinc oxide as solid acid catalyst. In: Pure and Applied Chemistry. 2018 ; Vol. 90, No. 6. pp. 1035-1043.
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