Abstract
The hydrophobicity of oil shale was found to follow the sequence R-5 > Mahogany >> Eastern. Further, hydrophobicity was found to correlate with the total organic carbon (TOC) content, decreasing with increasing specific gravity of raw oil shale pieces. Differences in hydrophobicity from piece to piece indicate that gravity pre concentration would be much more effective for Western than for Eastern oil shales. Purified kerogen concentrates and low specific gravity fractions (<2.0) of raw Western oil shale samples show critical surface tension of wetting values of γc = ~ 35 mNm−1, and for a kerogen concentrate from an Eastern oil shale γc = ~ 46 mNm−1. This infers that dust from oil shale mining operations can be suppressed by surfactant solutions similar to those used to suppress coal dust.
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