Thermochemical behaviour of chlorine-containing material in biosludge during analytical pyrolysis

Pia Oesch, Raimo Alén, Eero Leppämäki

Research output: Contribution to journalArticleScientificpeer-review


Thermochemical behaviour of the air-dried solid matter of two different waste materials (activated sludge and a mixture of biosludge and bark) from a kraft pulp mill was investigated in the temperature range 250-650°C during analytical pyrolysis. No significant differences in the pyrolytic properties of these materials were found, the primary mass loss occurring at 350-500°C. In both cases, at 450°C, all organically bound chlorine (70-80% of the total chlorine) in the original feedstocks was released, mainly in the form of hydrogen chloride. Results indicated that pyrolysis prior to combustion of biosludge is one attractive way of releasing organically bound chlorine and reducing the possibility of forming environmentally harmful chlorinated compounds.
Original languageEnglish
Pages (from-to)J131-J134
JournalJournal of Pulp and Paper Science
Issue number4
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed


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