Hydrophobic flocculation and Box-Wilson experimental design for beneficiating fine coal

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dc.contributor.authorUcbeyiay, H.
dc.date.accessioned2020-03-26T18:42:08Z
dc.date.available2020-03-26T18:42:08Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe purpose of this study is twofold: first, to determine the appropriate bridging liquid, pH, stirring speed and dispersant for hydrophobic flocculation of coal. Kerosene, n-heptane, benzole and n-hexane were used as bridging liquids. The coal suspension could be flocculated better by kerosene compared to the other bridging liquids at natural pH value of coal. From the experiments carried out to determine the effect of stirring speed on the hydrophobic flocculation of coal suspension, it was found that a stirring speed of 750 rpm was required to achieve the maximum combustible recovery and minimum ash content values of flocculated coal particles. The effects of sodium silicate, sodium hexametaphosphate, sodium phosphate and sodium pyrophosphate used as inorganic dispersants on the hydrophobic flocculation of coal were also studied. Sodium silicate was more effective than the other dispersants in the presence of kerosene. The best results were obtained with a concentration of 1 g/dm(3) sodium silicate and 4 g/dm(3) concentration of kerosene. It was determined that a clean coal having an ash content of 1033% with a combustible recovery of 89.54%. The second fold of study is the Box Wilson experimental design method and it was employed to evaluate the effects of important variables such as bridging liquid concentration (kerosene), dispersant (sodium silicate) concentration and stirring speed on the hydrophobic flocculation of coal. Response function coefficients were determined by the regression analysis of experimental data and the predictions were found to be in good agreement with the experimental results. Similar to the results of the first fold of experimental studies, the optimum kerosene concentration, sodium silicate concentration and stirring speed were determined as 4 g/dm(3), 1 g/dm(3) and 750 rpm, respectively, when considering combustible recovery and ash content. (c) 2012 Elsevier B.V. All rights reserved.en_US
dc.identifier.doi10.1016/j.fuproc.2012.09.020en_US
dc.identifier.endpage8en_US
dc.identifier.issn0378-3820en_US
dc.identifier.issn1873-7188en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.fuproc.2012.09.020
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29558
dc.identifier.volume106en_US
dc.identifier.wosWOS:000314191800001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCIENCE BVen_US
dc.relation.ispartofFUEL PROCESSING TECHNOLOGYen_US
dc.relation.publicationcategoryDiğeren_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectCoalen_US
dc.subjectHydrophobic flocculationen_US
dc.subjectBox-Wilson designen_US
dc.subjectBridging liquidsen_US
dc.subjectInorganic dispersantsen_US
dc.titleHydrophobic flocculation and Box-Wilson experimental design for beneficiating fine coalen_US
dc.typeReviewen_US

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