Transformation of waste marigold flowers into porous carbons via hydrothermal carbonization

Nattapat Chaiammart, Sittan Wongcharoen, Apiluck Eiad-Ua, Takahiro Ishizaki, Gasidit Panomsuwan

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Vast quantities of marigold flowers are often discarded as waste at sacred places and temples after religious ceremonies in Thailand. This has motivated us to examine the utilization of waste marigold flowers as a precursor for the synthesis of porous carbons by hydrothermal carbonization (HTC) and pyrolysis. Waste marigold flowers were hydrothermally treated at 180 °C for 2, 12, and 24 h. The resultant hydrochars were subsequently pyrolyzed at 800 °C under argon (Ar) atmosphere. Based on X-ray diffraction and Raman spectroscopy analyses, the samples exhibited an amorphous phase regardless of HTC time. With increasing HTC time, the marigold surface became rougher and more ruptured. This resulted in the development of a porous structure, thereby increasing surface area. The specific surface area of carbon samples increased from 118 to 281 m2 /g with HTC increasing from 2 to 24 h, respectively. Increase of specific surface area mainly resulted from the development of a microporous structure at longer HTC times. Our results offer guidelines to control surface area and porosity through the adjustment of HTC conditions.

本文言語English
ホスト出版物のタイトルGreen Convergence on Materials Frontiers II
編集者Taweechai Amornsakchai
出版社Trans Tech Publications Ltd
ページ23-29
ページ数7
ISBN(印刷版)9783035715521
DOI
出版ステータスPublished - 2019
外部発表はい
イベント13th Pure and Applied Chemistry International Conference, PACCON 2019 - Bangkok, Thailand
継続期間: 2019 2 72019 2 8

出版物シリーズ

名前Key Engineering Materials
824 KEM
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

Conference

Conference13th Pure and Applied Chemistry International Conference, PACCON 2019
国/地域Thailand
CityBangkok
Period19/2/719/2/8

ASJC Scopus subject areas

  • 材料科学(全般)
  • 材料力学
  • 機械工学

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