Effect of temperature, time and Zncl2 addition on formation of oxygenated functional groups on the surface of flexible carbon prepared by hydrothermal carbonization

Atsumi Miyajima, Taiga Watanabe, Masaru Watanabe, Richard Lee Jr. Smith, Tatsuya Shingu, Hirohumi Yamada

研究成果: Article査読

抄録

To increase the amount of oxygenated functional groups that contribute to the hydrophilicity of a flexible carbon surface, hydrothermal carbonization was applied. A 20 wt% slurry of Pseudotsuga menziesii was hydrothermally treated at 200-250°C for 0.5-24 h in the presence of 0-100 g of zinc chloride (ZnCl2). Hydrochar yield, residual cellulose ratio, H/C, O/C, and the amount of oxygenated functional groups (OFGs) were evaluated. The amount of OFGs decreased due to dehydration of cellulose and other components, but increased due to hydrolysis of molecular structures such as lactone ring-opening caused by prolonged reaction time and by addition of ZnCl2. These studies revealed that ZnCl2 was an effective additive to promote carbonization and to increase OFGs formation at 250°C in hydrothermal carbonization of woody biomass.

本文言語English
ページ(範囲)123-128
ページ数6
ジャーナルkagaku kogaku ronbunshu
44
2
DOI
出版ステータスPublished - 2018 1 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)

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