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Science 12 March 1982:
Vol. 215. no. 4538, pp. 1390 - 1392
DOI: 10.1126/science.215.4538.1390
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Articles

Kinetics of Delignification: A Molecular Approach

JOHNSON F. YAN 1

1 Weyerhaeuser Technology Center, Weyerhaeuser Company, Tacoma, Washington 98477

A treelike model has been proposed for the structure of lignin. Kinetics of delignification are formulated to account for the cleavage of linkages along the linear primary chains and at the cross-links. Experimental data obtained from isothermal delignification are used to verify this theory. Good agreement has been obtained in calculating the delignification curves. Activation energies are found to be 172 kilojoules per mole of cross-links and 132 kilojoules per mole of aryl ether bonds.

Submitted on September 28, 1981

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Science. ISSN 0036-8075 (print), 1095-9203 (online)