caa a22 4500 463247922 CHVBK 20180405153331.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10086-006-0834-z doi (NATIONALLICENCE)springer-10.1007/s10086-006-0834-z Pyrolysis reactions of various lignin model dimers [Elektronische Daten] [Haruo Kawamoto, Sunao Horigoshi, Shiro Saka] Primary pyrolysis reactions and relative reactivities for depolymerization and condensation/carbonization were evaluated for various lignin model dimers with α-O-4, β-O-4, β-1, and biphenyl substructures by characterizing the tetrahydrofuran (THF)-soluble and THF-insoluble fractions obtained after pyrolysis at 400°C. Reactivity was quite different depending on the model structure: depolymerization: α-O-4 [phenolic (ph), nonphenolic (nonph)], β-O-4 (ph) > β-O-4 (nonph), β-1 (ph, nonph) > biphenyl (ph, nonph); condensation/carbonization: β-1 (ph) > β-O-4 (ph) > α-O-4 (ph) > β-O-4 (nonph), biphenyl (ph, nonph), α-O-4 (nonph), β-1 (nonph). Major degradation pathways were also identified for β-O-4 and β-1 model dimers: β-O-4 types: Cβ-O cleavage to form cinnamyl alcohols and phenols and Cγ-elimination yielding vinyl ethers; β-1 types: Cα-Cβ cleavage yielding benzaldehydes and styrenes and Cγ-elimination yielding stilbenes. Relative reactivities of these pathways were also quite different between phenolic and nonphenolic forms even in the same types; Cβ-O cleavage (β-O-4) and Cγ-elimination (β-1) were substantially enhanced in phenolic forms. The Japan Wood Research Society, 2006 Pyrolysis nationallicence Pyrolysis behavior nationallicence Lignin nationallicence Model compound nationallicence Degradation pathway nationallicence Kawamoto Haruo Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut Horigoshi Sunao Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut Saka Shiro Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut Journal of Wood Science Springer-Verlag 53/2(2007-04-01), 168-174 1435-0211 53:2<168 2007 53 10086 https://doi.org/10.1007/s10086-006-0834-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0834-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kawamoto Haruo Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut NATIONALLICENCE 700 1- Horigoshi Sunao Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut NATIONALLICENCE 700 1- Saka Shiro Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, 606-8501, Yoshida Hon-machi, Sakyo-ku, Kyoto, Japan aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/2(2007-04-01), 168-174 1435-0211 53:2<168 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer