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characterizationofcoalwaterslurrypreparedforprbcoal

, PP. 1167-1171

Keywords: coalwaterslurry,prbcoal,characterization

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Abstract:

?powderriverbasin(prb)coal,whichaccountsforover40%ofthecoalconsumedforpowergenerationintheunitedstates,wasinvestigatedforpreparationofcoalwaterslurry(cws).thestaticstabilityandrheologyofthecwswerecharacterizedasafunctionofloading.thecoalloadingwasvariedfrom30%to50%andbothionic(sodiumpolystyrenesulphonate(pss))andnonionic(tritonx-100)surfactantswereemployedasadditives.theadditionofpsstoprbslurrieswasfoundtoyieldpoorstaticstability.ontheotherhand,tritonx-100wasfoundtobeaneffectivesurfactant,reducingthesedimentationbymorethan50%comparedtotheonewithoutsurfactantin45%cws.addingtritonx-100reducestheviscosityofthecwsforcoalloadingsof30%and40%.althoughtheviscositiesforcoalloadingof42.5%and45%arehigherwhentritonx-100isadded,thestaticstabilityissignificantlybetterthanforsampleswithoutsurfactant.thehighestcoalloadingforprbslurrywithacceptableviscosityforpumpingis42.5%.

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