Role of induction time and other properties in the recovery of coal from aqueous suspensions by agglomeration with heptane

dc.contributor.author Fan, C.W.
dc.contributor.author Hu, Y.C.
dc.contributor.author Markuszewski, R.
dc.contributor.author Wheelock, Thomas
dc.contributor.author Wheelock, Thomas
dc.contributor.department Ames Laboratory
dc.contributor.department Chemical and Biological Engineering
dc.date 2018-02-17T17:59:59.000
dc.date.accessioned 2020-06-30T01:09:02Z
dc.date.available 2020-06-30T01:09:02Z
dc.date.copyright Sun Jan 01 00:00:00 UTC 1989
dc.date.issued 1989
dc.description.abstract <p>The percent recovery of fine coal or graphite particles suspended in water by agglomeration with heptane was highly dependent on the measured induction time, i.e., the gas bubble to particle attachment time of the material. The induction time was found to correlate closely with the heat of immersion of the solids in water, another indicator of the hydrophobic/hydrophilic character of the material. For a series of coals and graphite, the agglomeration recovery decreased exponentially with increasing induction time. For the more oleophilic coal or graphite particles, an increase in salt (NaC1) concentration of the suspending medium caused an increase in agglomeration recovery and a decrease in induction time. For the less oleophilic coal or pyrite particles, an increase in salt concentration caused a decrease in agglomeration recovery apd an increase in induction time. Due to the opposing effects of salt concentration on the recoveries of a highly hydrophobic coal and pyrite, it was possible to improve the separation of these materials by an increase in salt concentration. On the other hand, because the recoveries of pyrite and a weakly oleophilic coal were affected similarly by an increase in salt concentration, it was not possible to improve the separation of these materials.</p>
dc.description.comments <p>Reprinted (adapted) with permission from Energy Fuels, 1989, 3 (3), pp 376–381. Copyright 1989 American Chemical Society.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/cbe_pubs/286/
dc.identifier.articleid 1287
dc.identifier.contextkey 8750343
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cbe_pubs/286
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/13380
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/cbe_pubs/286/0-1989_Wheelock_RoleInduction_License.pdf|||Fri Jan 14 23:11:39 UTC 2022
dc.source.bitstream archive/lib.dr.iastate.edu/cbe_pubs/286/1989_Wheelock_RoleInduction.pdf|||Fri Jan 14 23:11:40 UTC 2022
dc.source.uri 10.1021/ef00015a021
dc.subject.disciplines Catalysis and Reaction Engineering
dc.subject.disciplines Complex Fluids
dc.subject.disciplines Other Chemical Engineering
dc.supplemental.bitstream 1989_Wheelock_RoleInduction_License.pdf
dc.title Role of induction time and other properties in the recovery of coal from aqueous suspensions by agglomeration with heptane
dc.type article
dc.type.genre article
dspace.entity.type Publication
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relation.isOrgUnitOfPublication 25913818-6714-4be5-89a6-f70c8facdf7e
relation.isOrgUnitOfPublication 86545861-382c-4c15-8c52-eb8e9afe6b75
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