A Numerical Model Simulating the Remediation of Hydrocarbon-Impacted Soils Using Low-Temperature Oxidation |
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| Authors: | M Kashir K Zhang G Achari R G Moore S A Mehta M G Ursenbach |
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| Institution: | (1) Saudi Aramco, Engineering Office Bldg., E-3570, Dhahran, 31311, Saudi Arabia;(2) Department of Civil Engineering, University of Calgary, Calgary, Alberta, Canada, T2N 1N4;(3) Department of Chemical Engineering, University of Calgary, Calgary, Alberta, Canada, T2N N4 |
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| Abstract: | A 2-D mathematical model to simulate the temperature distribution, coke formation, and change in residual extractable oil
during remediation by low-temperature oxidation (LTO) process was developed. Simulation results indicate that the spacing
between wells, pressure difference, and air-injection temperature and different well patterns influence the temperature distribution
and consequently the level of remediation in the soil. The model results for coke formation and residual extractable oil distribution
compared well with experimental results. The operating conditions—air-injection temperature of about 200°C, air-injection
pressure of 6 to 10 kPa, air-extraction pressure of −110 Pa, and wells spaced 1 m apart installed in a nine-spot pattern—provide
good remediation of hydrocarbons in soil by LTO process.
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| Keywords: | Low temperature oxidation Hydrocarbon-impacted soils Numerical model Remediation |
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