Experimental Support for Coal Conversion Demonstration Projects at the Oak Ridge National Laboratory: Preheater Rheology, Slurry Mixing, and Vacuum Bottoms Viscosity

摘要

The Oak Ridge National Laboratory has carried out a major support role in the area of thermophysical properties since 1978. From the outset, the emphasis has been on obtaining data on real coal liquids at process conditions of temperature and pressure. The results of rheology (viscosity and density) measurements of reacting mixtures under conditions similar to those of the SRC preheaters are presented, emphasizing the effects of the measured non-Newtonian behavior on design. Data obtained on mixing coal and process solvent up to 500 exp 0 K (450 exp 0 F) will be discussed, emphasizing its impact on thermal efficiency of the SRC processes. Finally, design and initial operation of a unique instrument to measure the viscosity on-line of streams containing up to 55% solids will be discussed. (ERA citation 07:020731)