Dry Ash Transport for the Cholla Power Plant

Arizona Public Service (APS) Engineering, 2010-11

Liaison(s): Dennis A. Del Grosso P.E.
Advisor(s): Donald Remer
Students(s): Caitlin Jacques (TL-S), Javier Morquecho (TL-F), Margaret Brier (S), Jinhwa Chun (S), Roxie Bartholomew (F), William Grabill (F)

In May 2010, the Environmental Protection Agency (EPA) proposed new regulations on coal combustion residuals (CCR). These regulations, if ratified, will require coal ash be disposed of with <50% moisture, which would entail major retrofits to existing plants infrastructure for the transport and storage of CCR. Since coal provides about half of the US's power, this will increase the cost of electricity nationwide, warranting the development of cost-effective solutions. This project analyzed cost-effective dry ash capture and transport systems that would comply with the potential regulatory requirements in the disposal of ash for the Cholla Power Plant.