Urea/nitric acid co-impregnated pitch-based activated carbon fiber for the effective removal of formaldehyde

Dong Yeon Ryu, Takaaki Shimohara, Koji Nakabayashi, Jin Miyawaki, Joo Il Park, Seong Ho Yoon

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Urea/nitric acid co-impregnated pitch-based activated carbon fibers (ACFs) were examined as adsorbents for the removal of low-concentration formaldehyde gas from dry and humid atmospheres. Urea, which is a harmless and environmentally friendly primary amine, was selected as an effective reagent to capture formaldehyde and nitric acid was used to promote the oxidation of formaldehyde into formic acid, which inhibits the liberation of formaldehyde even under humid atmospheres. The optimized urea/nitric acid co-impregnated ACF showed a 110-fold (0.72 mg/g to 79.28 mg/g) improvement in its formaldehyde removal capability as compared to that of pristine ACF at 40% humidity. The formaldehyde removal mechanism is proposed based on careful analysis and quantification of the inlet and outlet gases. Further, the optimized sample facilitates complete removal of formaldehyde from ambient air at humidity of 11–88% and temperatures of 3–26.9 °C over 24 h, whereas only 81.5% formaldehyde removal is achieved with pristine ACF under the same conditions.

本文言語英語
ページ(範囲)98-105
ページ数8
ジャーナルJournal of Industrial and Engineering Chemistry
80
DOI
出版ステータス出版済み - 12 25 2019

All Science Journal Classification (ASJC) codes

  • 化学工学(全般)

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