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dc.contributor.authorRigopoulos, I.en
dc.contributor.authorVasiliades, M. A.en
dc.contributor.authorIoannou, I.en
dc.contributor.authorEfstathiou, A. M.en
dc.contributor.authorGodelitsas, A.en
dc.contributor.authorKyratsi, Theodoraen
dc.creatorRigopoulos, I.en
dc.creatorVasiliades, M. A.en
dc.creatorIoannou, I.en
dc.creatorEfstathiou, A. M.en
dc.creatorGodelitsas, A.en
dc.creatorKyratsi, Theodoraen
dc.description.abstractThe investigation of potential options for CO2 sequestration is of vital importance for alleviating the ongoing climate problem. This paper presents an efficient method for enhancing the ex situ carbonation of dunites. The ball milling process was applied to a dunite from the Troodos ophiolite (Cyprus), in order to create a new type of material with enhanced CO2 uptake. Through CO2 chemisorption followed by temperature-programmed desorption (CO2-TPD) experiments, optimum ball milling conditions were found (12 h of wet ball milling with 50 wt% ethanol as process control agent), leading to an increase of CO2 uptake of dunite by a factor of 6.9. A further increase of CO2 uptake by 10% was accomplished after 4 h of additional ball milling with smaller balls. Additionally, CO2-TPD along with in situ DRIFTS studies indicated that the CO2 uptake of the dunitic materials can be substantially enhanced by the presence of H2O during CO2 chemisorption. The positive effect of H2O on CO2 chemisorption becomes much more evident after the ball milling process. Specifically, the CO2 uptake of the ball-milled sample (BM45) was enhanced by a factor of 5.8 (from 181.9 to 1047.5 μmol g-1), when CO2 chemisorption was performed in the presence of 20 vol% H2O. © 2016 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.en
dc.sourceAdvanced Powder Technologyen
dc.subjectCarbon dioxideen
dc.subjectBall millingen
dc.subjectMilling (machining)en
dc.subjectBall milling processen
dc.subjectProcess control agentsen
dc.subjectWet ball millingen
dc.subjectMineral carbonationen
dc.subjectTemperature programmed desorptionen
dc.subjectMilling conditionsen
dc.subjectCO2 sequestrationen
dc.subjectEffect of Hen
dc.subjectEx situ mineral carbonationen
dc.titleEnhancing the rate of ex situ mineral carbonation in dunites via ball millingen
dc.description.endingpage371Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.contributor.orcidKyratsi, Theodora [0000-0003-2916-1708]

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