Civil and Environmental Engineering Publications

Self-sustaining Smouldering Combustion of Coal Tar for the Remediation of Contaminated Sand: Two–Dimensional Experiments and Computational Simulations

Document Type

Article

Publication Date

6-15-2015

Journal

Fuel : The Science and Technology of Fuel and Energy

Volume

150

First Page

288

URL with Digital Object Identifier

http://dx.doi.org/10.1016/j.fuel.2015.02.014

Last Page

297

Abstract

This study presents the development and validation of a computational model which simulates the propagation of a smouldering front through a porous medium against unique experiments in coal tar and sand. The model couples a multiphase flow solver in porous media with a perimeter expansion module based on Huygens principle to predict the spread. A suite of two-dimensional experiments using coal tar- contaminated sand were conducted to explore the time-dependent vertical and lateral smouldering front 6 propagation rates and final extent of remediation as a function of air injection rate. A thermal severity analysis revealed, for the first time, the temperature-time relationship indicative of coal tar combustion. The model, calibrated to the base case experiment, then correctly predicts the remaining experiments. This work provides further confidence in a model for predicting smouldering, which eventually is expected to be useful for designing soil remediation schemes for a novel technology based upon smouldering destruction of organic contaminants in soil.

Notes

POSTPRINT (ACCEPTED MANUSCRIPT) Published:

Hasan, T. JI Gerhard, R. Hadden, G. Rein. 2015. Self-sustaining smouldering combustion of coal tar for the remediation of contaminated sand: Two-Dimensional Experiments and Computational Simulations. Fuel, 150: 288-297.

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