Universität zu Köln

Brueck, Felix, Schnabel, Kevin, Mansfeldt, Tim ORCID: 0000-0002-7557-6827 and Weigand, Harald (2018). Accelerated carbonation of waste incinerator bottom ash in a rotating drum batch reactor. J. Environ. Chem. Eng., 6 (4). S. 5259 - 5269. OXFORD: ELSEVIER SCI LTD. ISSN 2213-3437

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Abstract

Accelerated carbonation is known to improve the leaching behaviour and geotechnical properties of waste incineration bottom ash (BA). Regarding process implementation on the industrial scale dynamic reactor configurations may be particularly suited since they enhance the mass exchange between gas and solid. Here we evaluated the influence of fundamental parameters on accelerated carbonation of BA in a rotating drum batch reactor equipped with an automated CO2 supply at close to atmospheric pressure conditions. Firstly, the effect of rotation speed and reactor fill level on the solids motion was studied. Secondly, the effects of CO2-concentration, fill level, and moisture on BA carbonation were investigated. Evaluation was based on the observed CO2 uptake, self-heating, and BA leachability. The bed behaviour of BA strongly differed from that of standard materials and was more affected by fill level than by rotation speed. The fill level was not a limiting factor for BA carbonation within the tested range (7-45 vol.-%). Both the CO2 uptake rate and the final level of carbonation increased as the CO2-concentration was raised from 15 to 75 vol.-%. A close relationship between CO2 uptake and reactor temperature was confirmed by benchmarking a heat balance model against the carbonation enthalpy. Carbonated BA exhibited a strongly decreased mobility of Pb and Zn as compared to fresh BA. The leaching behaviour of BA could be improved such as to comply with the German landfill ordinance for non-hazardous waste.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Brueck, Felix UNSPECIFIED UNSPECIFIED UNSPECIFIED Schnabel, Kevin UNSPECIFIED UNSPECIFIED UNSPECIFIED Mansfeldt, Tim UNSPECIFIED orcid.org/0000-0002-7557-6827 UNSPECIFIED Weigand, Harald UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-177706
DOI:	10.1016/j.jece.2018.08.024
Journal or Publication Title:	J. Environ. Chem. Eng.
Volume:	6
Number:	4
Page Range:	S. 5259 - 5269
Date:	2018
Publisher:	ELSEVIER SCI LTD
Place of Publication:	OXFORD
ISSN:	2213-3437
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Geosciences > Geographisches Institut
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LEACHING BEHAVIOR; GRANULAR SOLIDS; ROTARY KILNS; CO2 STORAGE; BED MOTION; SEQUESTRATION; RESIDUES; STABILIZATION; PERSPECTIVES; TRANSITION Multiple languages Engineering, Environmental; Engineering, Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/17770