Micro-ratcheted surfaces for a heat engine biomass conveyor

Cellulosic particles on surfaces consisting of microstructured, asymmetric ratchets (100 by 400 μm) were observed to spontaneously move orthogonal to ratchet wells above the cellulose reactive Leidenfrost temperature (>750 °C). Evaluation of the accelerating particles supported the mechanism of p...

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Veröffentlicht in:	Energy & environmental science 2016-05, Vol.9 (5), p.1645-1649
Hauptverfasser:	Krumm, Christoph, Maduskar, Saurabh, Paulsen, Alex D, Anderson, Anthony D, Barberio, Nicholas L, Damen, Jonathan N, Beach, Connor A, Kumar, Satish, Dauenhauer, Paul J
Format:	Artikel
Sprache:	eng
Schlagworte:	09 BIOMASS FUELS Asymmetry Biomass Cellulose Conveyors ENGINEERING Fuels Heat engines Pyrolysis Reactors
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Beschreibung
Zusammenfassung:	Cellulosic particles on surfaces consisting of microstructured, asymmetric ratchets (100 by 400 μm) were observed to spontaneously move orthogonal to ratchet wells above the cellulose reactive Leidenfrost temperature (>750 °C). Evaluation of the accelerating particles supported the mechanism of propelling viscous forces (50-200 nN) from rectified pyrolysis vapors, thus providing the first example of biomass conveyors with no moving parts driven by high temperature for biofuel reactors. Biomass particles spontaneously self-propel in the direction of asymmetric ratchets above the reactive Leidenfrost temperature.
ISSN:	1754-5692 1754-5706
DOI:	10.1039/c6ee00519e