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Journal of the Japan Institute of Energy Vol. 103 (2024), No. 11

ISIJ International
belloff
ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753
Publisher: The Japan Institute of Energy

Backnumber

  1. Vol. 103 (2024)

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Journal of the Japan Institute of Energy Vol. 103 (2024), No. 11

Formation Mechanism of Carbonized Solid from Cellobiose under Hydrothermal Conditions

Seiichi INOUE, Satoshi KUMAGAI, Takashi ENDO

pp. 90-94

DOI:

10.3775/jie.103.90

Abstract

This paper reports on the formation mechanism of carbonized solid from cellobiose, which is a decomposition product of cellulose, under hydrothermal conditions (temperature: 240 °C; holding time range: 0–240 min). With the increase in the temperature to 240 °C, most of the cellobiose was hydrolyzed to glucose, with no sign of a carbonized solid. The obtained glucose was converted to 5-(hydroxymethyl)-2-furaldehyde (5-HMF) in less than 15 min (holding time) at the designated temperature. A carbonized solid was obtained via 5-HMF among the existing compounds after an extended holding time of 30 min under the hydrothermal condition. On the other hand, for longer holding times (> 60 min) at the designated temperature, 5-HMF is known to mainly decompose into levulinic and formic acids. However, after obtaining these compounds, the carbonized solid yield did not increase. These results indicate that degradation products, such as glucose and levulinic acid, do not directly produce a carbonized solid but do so via 5-HMF.

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Formation Mechanism of Carbonized Solid from Cellobiose under Hydrothermal Conditions

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