Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity

Amrita Mukherjee, Peter Rozelle, Sarma V. Pisupati

Research output: Contribution to conferencePaperpeer-review

Abstract

Carbonaceous solid-water slurry rheology is greatly affected by the surface properties of the solids used. Surface interaction energies of the three carbonaceous solids-petcoke, semi-anthracite and Illinois#6 coal were calculated. It was observed that hydrophobic interaction energy (calculated on the basis of contact angle measurements) is 2-3 orders of magnitude higher than the electrostatic interaction energy (calculated on the basis of zeta potential) and the Van der Waal interaction energy. Therefore in cases of petcoke, semi-anthracite and Illinois#6 coal water slurries, attractive hydrophobic interaction energy plays the dominant role in determining slurry rheology and the other interaction energies can be safely ignored. Petcoke having the maximum inter-particle hydrophobic interaction energy demonstrates maximum yield stress and viscosity when in suspension with water. Illinois#6 coal water slurry has higher yield stress and viscosity value as compared to semi-anthracite coal water slurry because of higher oxygen content.

Original languageEnglish (US)
StatePublished - Jan 1 2014
Event31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014 - Pittsburgh, United States
Duration: Oct 6 2014Oct 9 2014

Other

Other31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014
CountryUnited States
CityPittsburgh
Period10/6/1410/9/14

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Fingerprint Dive into the research topics of 'Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity'. Together they form a unique fingerprint.

Cite this