Ultra-fine, nano-crystalline six-line ferrihydrite (5Fe2O3-9H2O) and cubic zirconia (ZrO2) powders have been produced using the Rapid Thermal Decomposition of precursors in Solution (RTDS) technology. Nano-crystalline RTDS six-line ferrihydrite powder used as anin situ precursor for first-stage direct coal liquefaction catalysts increased the liquefied products from Blind Canyon Seam coal by 22% absolute over thermal background at 350°C. Initial sintering studies performed on nano-crystalline RTDS ZrO2 powder have also been presented and compared to predictions made from theories derived for micro-crystalline powders.
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Pacific Northwest Laboratory is operated for the United States Department of Energy by the Battelle Memorial Institute under contract DE-AC06-76RLO 1830.
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Darab, J.G., Buehler, M.F., Linehan, J.C. et al. Nano-Crystalline Powders and Suspensions Generated Using A Flow-Through Hydrothermal Process, Part II: Applications. MRS Online Proceedings Library 346, 505–510 (1994). https://doi.org/10.1557/PROC-346-505