Decomposition kinetics of maltose in subcritical water

Shabnam Haghighat Khajavi, Yukitaka Kimura, Toshinobu Oomori, Ryuichi Matsuno, Shuji Adachi

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


The decomposition process of maltose in subcritical water was studied using a tubular reactor in the temperature range of 180 to 260°C and at 10 MPa. The formation of glucose and 5-hydroxymethyl-2-furaldehyde during the maltose decomposition was also observed. The decomposition rate of maltose was faster at higher temperatures. The rate was approximated by first-order kinetics during the early stage of the decomposition, but was accelerated and deviated from these kinetics at the later stage. The effluent pH decreased as the residence time in the reactor increased and the decrease of pH affected the maltose decomposition rate and glucose formation. Low pH of a feed solution accelerated maltose decomposition. A good correlation was obtained between the pH of the effluent and the rate constant of the first-order kinetics.

Original languageEnglish
Pages (from-to)91-95
Number of pages5
JournalBioscience, Biotechnology and Biochemistry
Issue number1
Publication statusPublished - Jan 2004
Externally publishedYes


  • Decomposition
  • Kinetics
  • Maltose
  • Subcritical water
  • pH

ASJC Scopus subject areas

  • Biotechnology
  • Analytical Chemistry
  • Biochemistry
  • Applied Microbiology and Biotechnology
  • Molecular Biology
  • Organic Chemistry


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