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Title: Condensation Reactions of Some Lignin Related Compounds at Relatively Low Pyrolysis Temperature
Authors: Nakamura, Takeshi
Kawamoto, Haruo  kyouindb  KAKEN_id
Saka, Shiro  kyouindb  KAKEN_id
Author's alias: 河本, 晴雄
坂, 志朗
Keywords: Lignin
pyrolysis
condensation
lignin related compound
mechanism
Issue Date: Aug-2007
Publisher: Informa UK Limited
Journal title: Journal of Wood Chemistry and Technology
Volume: 27
Issue: 2
Start page: 121
End page: 133
Abstract: ondensation reactions of some lignin related compounds were studied under the pyrolysis conditions (air/250°C/2 h). Guaiacol, methylguaiacol and methylveratrole were recovered almost quantitatively with small amount of radical coupling products derived from phenoxy and benzyl radicals. Side‐chains (Cα˭Cβ, Cα‐OH) increased the condensation reactivity substantially. From the dimer structures, vinyl condensation and quinone methide mechanisms were indicated as important condensation pathways for these compounds. As for model compounds for the structures formed in lignin primary pyrolysis, coniferyl alcohol (from β‐ether structure) was very reactive, while 4, 4′‐dihydroxy‐3, 3′‐dimethoxystilbene (from β‐aryl structure) was stable.
Rights: This is an Accepted Manuscript of an article published by Taylor & Francis in 'Journal of Wood Chemistry and Technology’ on 2007, available online: https://www.tandfonline.com/10.1080/02773810701515143.
The full-text file will be made open to the public on 27 July 2008 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/2433/240769
DOI(Published Version): 10.1080/02773810701515143
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