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Title: Solid/liquid- and vapor-phase interactions between cellulose- and lignin-derived pyrolysis products
Authors: Hosoya, Takashi
Kawamoto, Haruo  kyouindb  KAKEN_id
Saka, Shiro  kyouindb  KAKEN_id
Author's alias: 細谷, 隆史
河本, 晴雄
坂, 志朗
Keywords: Cellulose
Lignin
Pyrolysis
Gasification
Interaction
Mechanism
H-donor
H-acceptor
Issue Date: May-2009
Publisher: Elsevier BV
Journal title: Journal of Analytical and Applied Pyrolysis
Volume: 85
Issue: 1-2
Start page: 237
End page: 246
Abstract: Solid/liquid- and vapor-phase interactions between cellulose- and lignin (Japanese cedar milled wood lignin)-derived pyrolysis products were studied under the conditions of N2/600 °C/40–80 s. A dual-space closed ampoule reactor was used to eliminate the solid/liquid-phase interactions, and careful comparison of the resulting data with those of the pyrolysis of the mixed samples gave some insights into the solid/liquid- and vapor-phase interactions separately. With the solid/liquid-phase interactions, the tar yields from both cellulose and lignin increased with the decreasing yields of the char fractions in a short pyrolysis time of 40 s (primary pyrolysis stage). Most of the identified tar components from cellulose and lignin increased in their yields. The vapor-phase interactions were significant at a longer pyrolysis time of 80 s (secondary reaction stage) when the methoxyl groups of the lignin-derived volatiles were cleaved homolytically. The vapor-phase interactions accelerated the gas formation from the cellulose-derived volatiles with suppressing the vapor-phase char formation of the lignin-derived volatiles. The yields of methane and catechols from lignin also increased greatly instead of the formation of o-cresols. Most of these influences are explained with a proposed interaction mechanism, in which the cellulose-derived volatiles act as H-donors while the lignin-derived volatiles (radicals) act as H-acceptors.
Rights: © 2008. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
The full-text file will be made open to the public on 1 May 2011 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/240655
DOI(Published Version): 10.1016/j.jaap.2008.11.028
Appears in Collections:Journal Articles

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