ダウンロード数: 187
このアイテムのファイル:
ファイル | 記述 | サイズ | フォーマット | |
---|---|---|---|---|
CICEQ160325018F.pdf | 1.1 MB | Adobe PDF | 見る/開く |
タイトル: | Molecular mechanisms for the gas-phase conversion of intermediates during cellulose gasification under nitrogen and oxygen/nitrogen |
著者: | Fukutome, Asuka Kawamoto, Haruo https://orcid.org/0000-0002-4934-8054 (unconfirmed) Saka, Shiro |
著者名の別形: | 河本, 晴雄 坂, 志朗 |
キーワード: | Cellulose gasification/ Volatiles Pyrolysis Levoglucosan Gas-phase reactions Molecular mechanism |
発行日: | 2016 |
出版者: | Savez hemijskih inženjera Srbije : Association of the Chemical Engineers of Serbia |
誌名: | Chemical Industry and Chemical Engineering Quarterly |
巻: | 22 |
号: | 4 |
開始ページ: | 343 |
終了ページ: | 353 |
抄録: | Gas-phase conversions of volatile intermediates from cellulose (Avicel PH-101) were studied using a two-stage experimental setup and compared with those of levoglucosan (1, 6-anhydro-β-D-glucopyranose). Under N2 or 7% O2/N2 flow, vapors produced from the pyrolysis zone (500 °C) degraded in the secondary reaction zone at 400, 500, 600 or 900 °C (residence time: 0.8–1.4 s). The 69.3% (C-based) of levoglucosan was obtained at 400 °C under N2 flow along with 1, 6-anhydro-β-D-glucofuranose (8.3%, C-based), indicating that these anhydrosugars are the major volatile intermediates from cellulose pyrolysis. Levoglucosan and other volatiles started to fragment at 600 °C, and cellulose was completely gasified at 900 °C. Most gas/tar formations are explained by gas-phase reactions of levoglucosan reported previously, except for some minor reactions originating from the molten-phase pyrolysis, which produced benzene, furans and 1, 6-anhydro-β-D-glucofuranose. Synergetic effects of O2 and volatiles accelerated fragmentation, and cellulose gasification was completed at 600 °C, which reduced benzene and hydrocarbon gas productions. The molecular mechanisms including the action of O2 as a biradical are discussed. These lines of information provide insights into the development of tarfree clean gasification that maintains high efficiency. |
著作権等: | © 2016, CI and CEQ. All rights reserved. All papers are licensed under a Creative Commons License Attribution-NonCommercial-NoDerivatives 4.0 International License. |
URI: | http://hdl.handle.net/2433/235607 |
DOI(出版社版): | 10.2298/CICEQ160325018F |
出現コレクション: | 学術雑誌掲載論文等 |
このリポジトリに保管されているアイテムはすべて著作権により保護されています。