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Reduction of polycyclic aromatic hydrocarbon (PAH) emissions from coking plants (REDPAH)
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Reduction of polycyclic aromatic hydrocarbon (PAH) emissions from coking plants (REDPAH)

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This project has developed a number of approaches to understand and reduce polycyclic aromatic hydrocarbon (PAH) and particulate matter (PM) emissions from coking plants. Ammonia water spraying in the gooseneck at the beginning of the coking cycle has indicated that coke oven pressure can be regulated during the whole coking time by two simple water sprayers. Comparisons were made between the content of PAHs in Gray-King tars of several commercial coals and blends and the PAHs emitted in a 250 kg coking oven to predict and reduce the emissions for actual plants. The 250 kg oven trials have identified how marked reductions in PAH emissions can be achieved for the Maltby coal used through blending with low volatile coking coals. An innovative procedure for the measurement of non-stack PAH emissions from coke oven batteries has been developed, together with an integrated system for battery evaluation. PM10 and PAH samples taken in two different locations of ArcelorMittal’s coking plant in Gijon (Spain), before and after the implantation of a new charging car, revealed the significant reductions achieved with this new equipment. The stable carbon isotopic values (δ13C) of PAHs in tars are fairly constant for all the major coking coals investigated and this has enabled non-coal tar inputs into environment samples to be identified in the vicinity of the Gijon and Monckton plants.
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ISSN 1831-9424
ISBN 978-92-79-21512-4
DOI 10.2777/78958
Numero di catalogo KI-NA-24965-EN-N
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ISSN 1831-9424 ISBN 978-92-79-21512-4 DOI 10.2777/78958 Numero di catalogo KI-NA-24965-EN-N
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