PERC Pittsburgh Energy Research

PERC [Possibly named after the Pittsburgh Energy Research Center, now the National Energy Technology Laboratory] A process for making a heavy fuel oil by reacting a slurry of biomass in aqueous sodium carbonate solution with carbon monoxide. Under development in the United States in 1980. 

The pressure drop data in highly-pulsed- and spray-flow regimes were obtained in a 10.2-cm-i.d. clear acrylic column by the Pittsburgh Energy Research Center (PERC).22 Over 300 pressure-drop data points were obtained for both 0.635-cm x 0.635-cm and 0.32-cm x 0.32-cm pellets. Some of these data are shown in Fig. 7-5. These data were well correlated by Tallmadge s correlation,36 as shown in Fig. 7-6. Sato et al.,27 on the other hand, correlated their data with the Lockhart-Martinelli type of relation. They also graphically illustrated some pressure-drop data in all three bubble-, pulsed-, and spray- (or gas-continuous) flow regimes. 

---