Physical Properties of Popcorn Ash ACERC Derek Bassett

Physical Properties of Popcorn Ash ACERC Derek Bassett, Nathan Lambson Background l. Coal-fired Conclusions power plant byproduct l. Formed from fly ash deposits on furnace wall l. Deposits break off and fall back down or flow downstream l. Particles interfere with heat exchangers and SCR surfaces l. Particles show apparent correlation between color and mass, porosity, and drag coefficient l. Average drag coefficient of 2. 5 is in range of literature value of 2. 4 l. There is an apparent linear relationship between predicted mass and measured mass Purpose l. Determine aerodynamic properties for use in computational fluid dynamics l. Determine other physical properties such as density, size, porosity, etc. l. Determine chemical composition Future Work l. Perform experiments with falling particles to find empirical velocity measurements l. Validate drag coefficient estimates l. Perform Method l. Used digital photographic analysis to determine projected surface area, outside surface area, and total volume l. Used non-spherical shape factors to find terminal velocity l. Used literature correlation between Re and CD to find drag coefficient chemical analysis to find possible correlation between color and composition l. Further validate porosity measurements with Hg BET analyzer Acknowledgements Dr. Larry Baxter, Brigham Young University, Provo, UT Dr. Larry Monroe. Southern Company Services, Inc. Birmingham, AL