Abstract
The mechanism of strengthening the leaching of vanadium from petroleum coke by surfactant was investigated. When the surfactant was used, the leaching efficiency was improved, the leaching amount of vanadium increased from 390 to 540 ppm at 303 K. The surface physical chemical properties of the leaching solution, such as the conductivity, the surface tension, contact angle, and zeta potential were studied before and after the surfactant is added. The zeta potential increased from –20 to 40 mV, when the surfactant was used from 0 to 700 mg/L, and the surface tension and contact angle decreased significantly first, then remained constant; the interface energy increased. All the change of physical chemical properties enhanced wetting capability and combination adhesion. And this improved the leaching efficiency.
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