Combustion properties of organic constituents of kraft black liquors

Raimo Alén, Mikko Hupa, Taina Noopila

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)


The combustion behavior of the main organic components (lignin and aliphatic carboxylic acids) of kraft black liquors at 700-degrees-C and 800-degrees-C was studied using the single droplet burning technique. Significantly longer burning times (pyrolysis time and char burning time) were observed for the lignin-dominated liquors than for liquors in which the fraction of aliphatic acids were dominant. In most of the cases, swelling under the combustion conditions was more extensive for liquors containing hardwood lignin than for those containing softwood lignin. Of the minor organic fractions (extractives and hemicelluloses) of black liquor, only hemicelluloses increased the relative swelling significantly.
Original languageEnglish
Pages (from-to)337-342
Issue number4
Publication statusPublished - 1992
MoE publication typeA1 Journal article-refereed


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