Abstract
This study investigated the behavior of electrically induced mass transport of hydrocarbon liquids in clay bearing soil formations under constant electric gradient without the influence of surfactants or hydraulic flushing. The impact of clay content and clay type on the transport rate through the soil matrix as well as the electrical charge efficiency required to induce transport processes was studied using surrogate soil formations. The recovery rate and electrical charge as a function of clay content and type were explored. Clay content played the key role in electrically induced hydrocarbon mass transport in porous media. The charge efficiency was influenced by clay content, more so than clay type. The pore volume of flow was observed to be directly related to the charges generated. Clay content for optimal recovery of a surrogate hydrocarbon was estimated to be 12.5% by solid mass based on experimental results.
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