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

Amrita Mukherjee, Peter Rozelle, Sarma V. Pisupati

Research output: Contribution to conferencePaper

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

Fingerprint

Coal slurries
Coal water mixtures
Coal
Slurries
hydrophobicity
Hydrophobicity
slurry
elasticity
Yield stress
Sustainable development
Elasticity
sustainable development
viscosity
Anthracite
Viscosity
coal
anthracite
energy
Water
Rheology

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology

Cite this

Mukherjee, A., Rozelle, P., & Pisupati, S. V. (2014). Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity. Paper presented at 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014, Pittsburgh, United States.
Mukherjee, Amrita ; Rozelle, Peter ; Pisupati, Sarma V. / Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity. Paper presented at 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014, Pittsburgh, United States.
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Mukherjee, A, Rozelle, P & Pisupati, SV 2014, 'Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity' Paper presented at 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014, Pittsburgh, United States, 10/6/14 - 10/9/14, .

Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity. / Mukherjee, Amrita; Rozelle, Peter; Pisupati, Sarma V.

2014. Paper presented at 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014, Pittsburgh, United States.

Research output: Contribution to conferencePaper

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N2 - 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.

AB - 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.

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Mukherjee A, Rozelle P, Pisupati SV. Analysis of hydrophobicity of carbonaceous solids and their effect on the slurry viscosity. 2014. Paper presented at 31st Annual International Pittsburgh Coal Conference: Coal - Energy, Environment and Sustainable Development, PCC 2014, Pittsburgh, United States.