Organic emissions from co-combustion of mixed plastics with coal in a bubbling fluidized bed boiler

Martin Frankenhäuser (Corresponding Author), Helena Manninen, Ilkka Kojo, Juhani Ruuskanen, Terttu Vartiainen, Raili Vesterinen, Jorma Virkki

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Abstract

Mixed plastics can be burned safely with coal in modern fluidized bed boilers when flue gas carbon monoxide and dust emissions are kept low. The level of total emissions per thermal unit using plastics is smaller than when using coal. The proportion of mixed plastics incorporated into the plastics/coal fuel blends used in the tests did not aff5ct the emission levels of polychlorinated dibenzodioxines and dibenzofurans (PCDD/Fs). The addition of limestone to the fluidized bed resulted in slightly increased PCDD/F levels, but these nevertheless remained significantly below 0.1 ng/Nm3 TE NORDIC. It is probable that the sulphur contained in the primary fuel poisoned the catalysts responsible for the formation of PCDD/F in all the plastics/coal blends. Limestone aff5cted the formation of PCDD/F by binding sulphur in the gas phase or by increasing the calcium, tin, and chlorine levels of the fly ash. Only a small variation was observed in the copper concentrations of the fly ashes generated.

Original languageEnglish
Pages (from-to)309 - 316
Number of pages8
JournalChemosphere
Volume27
Issue number1 - 3
DOIs
Publication statusPublished - 1993
MoE publication typeA1 Journal article-refereed

Keywords

  • fluidized beds

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