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Polyoxometalates in oxidative delignification of chemical pulps: effect on ligninAuthor(s): Biljana Bujanovic; Sally Ralph; Richard Reiner; Kolby Hirth; Rajai Atalla
Source: Materials. Vol. 3, no. 3 (Mar. 2010): p. 1888-1903.
Publication Series: Miscellaneous Publication
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DescriptionChemical pulps are produced by chemical delignification of lignocelluloses such as wood or annual non-woody plants. After pulping (e.g., kraft pulping), the remaining lignin is removed by bleaching to produce a high quality, bright paper. The goal of bleaching is to remove lignin from the pulp without a negative effect on the cellulose; for this reason, delignification should be performed in a highly selective manner. New environmentally-friendly alternatives to conventional chlorine-based bleaching technologies (e.g., oxygen, ozone, or peroxide bleaching) have been suggested or implemented. In an attempt to find inorganic agents that mimic the action of highly selective lignin-degrading enzymes and that can be applicable in industrial conditions, the researchers have focused on polyoxometalates (POMs), used either as regenerable redox reagents (in anaerobic conditions) or as catalysts (in aerobic conditions) of oxidative delignification. The aim of this paper is to review the basic concepts of POM delignification in these two processes.
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CitationBujanovic, Biljana; Ralph, Sally; Reiner, Richard; Hirth, Kolby; Atalla, Rajai. 2010. Polyoxometalates in oxidative delignification of chemical pulps: effect on lignin. Materials. Vol. 3, no. 3 (Mar. 2010): p. 1888-1903.
KeywordsOxidation, chemical reactions, sulphate pulping process, polyoxometalates, bleaching, pulping, lignin, catalysis, lignocellulose, delignification, pulp and paper processes
- Structural changes of residual lignin of softwood and hardwood kraft pulp upon oxidative treatment with polyoxometalates
- Composition of the organic components in polyxometalate (POM) liquors from kraft pulp bleaching
- Lignin modification in the initial phase of softwood kraft pulp delignification with polyoxometalates (POMs)
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